Park Air Systems B6350-S2 VHF ground to air transmitter User Manual t6t

Park Air Systems Limited VHF ground to air transmitter t6t

Contents

User guide

T6T 50 Watt VHF Multimode TransmitterSelect TopicBack toMain PageMaintenanceInstallationOperationSpecificationThis documentation is applicable to transmitters at Mod strike 7Approvals andStandards
Back to TransmitterMain PageApprovals and Standards T6T VHF 50 Watt TransmittersThe following standards are applied:EMC EN 301 489-1; EN 301 489-22.Health & Safety, EN 60950, CAN/CSA-C22.2 No. 60950, UL 60950.Radio EN 300 676, IC RSS141, FCC part 15 and 87.Telecom CS-03.Approvals:Standards:The equipment is designed to meet the essential requirements of Directives1999/5/EC, 89/336EEC as amended by Directive 93/68/EEC, and 72/23/EEC.FCC Statement:This device has been tested and found to comply with the limits for a Class B digital device, pursuantto part 15 of the FCC Rules. These limits are designed to provide reasonable protection againstharmful interference in a residential installation.This equipment generates, uses and can radiate radio frequency energy and, if not installed and usedin accordance with the instructions, may cause harmful interference to radio communications.However, there is no guarantee that interference will not occur in a particular installation.If this equipment does cause harmful interference to radio or television reception, which can bedetermined by turning the equipment off and on, the user is encouraged to try to correct theinterference by one or more of the following measures:❑Reorient or relocate the receiving antenna.❑Increase the separation between the equipment and the receiver.❑Connect the equipment into an outlet on a circuit different from that to which the receiver isconnected. ❑Consult the supplier or an experienced radio/TV technician for help.Operation on 8.33 kHz channel spacing is restricted to European customers.
Back to TransmitterMain PageSpecificationThis section gives the specification applicable to the T6T VHF Multimode Transmitteroperating in AM modes, Mode 2 and Mode 3.All radios operate in AM-voice mode. Additional software must be loaded to allow AM-MSK,Mode 2 and Mode 3.
T6T 50 W VHF Transmitter Page 2 SpecificationBack to TransmitterMain PageGeneral SpecificationThe general specification applies to a transmitter irrespective of the selected operating mode. Separatelistings are given for AM modes, Mode 2 and Mode 3.VariantsThe T6T VHF Multimode Transmitter is available in the variants as listed in Table 1.Frequency accuracy All variants except HS Better than 1 ppm.HS variants Better than 0.3 ppm.Number of ChannelsAll variants The transmitter has a multichannel capability. 100 channels can be stored and recalled.Power RequirementsThe transmitter operates from an ac mains supply, or a dc input supply. When both supplies areconnected, the dc input acts as an automatic backup for the ac mains.ac input supply The transmitter operates from a 48 to 62 Hz single-phase ac supply and automatically adjusts to operate from any supply voltage ranging from 110 Vac to 240 Vac ±10%. The power consumption figures are given in Table 2.dc input supply The transmitter operates from a dc input supply between 21.6 and 32 V (measured at the radio’s input). Current loading is given in Table 2.Table 1 Transmitter VariantsDescription Part Number Frequency Range Special Applications50 watt standard frequency coverage transmitter B6350/NB/50 118 to 136.975 MHz Supports 2, 3 and 4-offset carrier operation50 watt extended frequency coverage transmitterB6350/WB/50 112 to 155.975 MHz Supports 2, 3 and 4-offset carrier operation50 watt, high stability, standard frequency coverage transmitter B6350HS/NB/50 118 to 136.975 MHz Supports 5-offset carrier operation50 watt, high stability, extended frequency coverage transmitterB6350HS/WB/50 112 to 155.975 MHz Supports 5-offset carrier operation
T6T 50 W VHF Transmitter Page 3 SpecificationBack to TransmitterMain PageDimensions and WeightThe dimensions and weight of the transmitter are:Width 483 mm (19 inches).Height 88.9 mm (3.5 inches). The height occupies 2U of equipment cabinet space.Depth 430 mm (16.9 inches) measured from front panel to rear panel.450 mm (17.8 inches) measured from front panel to rear of fan.Weight 13.5 kg (29.76 pounds).EnvironmentalTemperature range The transmitter operates to specification across the temperature range of -20°C to +55°C.The transmitter can be stored at temperatures ranging from-30°C to +70°C without causing any damage.Humidity The transmitter operates to specification at a relative humidity between 5% and 90% non-condensing.Altitude The radios operate to specification up to 15,000 feet. Additionally the equipment is capable of storage at altitudes up to 50,000 feet without damage.Shock and vibration The radios comply with shock and vibration protection MIL-STD-810E, method 516.4, procedure VI - Bench Handling.Ventilation The transmitters are cooled by an integral fan, which normally runs at half speed. At an RF PA temperature of 45°C this is increased to full speed and at 40°C it reduces to half speed again.The transmitters also include an additional temperature controlled fan contained in the power supply.Warm up time All variants are fully operational to specification within 20 seconds after switch on except the T6T HS, which is fully operational within 20 seconds but can takes up to 10 minutes to achieve frequency accuracy for offset carrier.Table 2 Power ConsumptionRequirement Normal Operationac dcMaximum 500 VA 12 ANot Transmitting 60 VA 1 A
T6T 50 W VHF Transmitter Page 4 SpecificationBack to TransmitterMain PageAM ModesThe transmitter can operate in AM-Voice mode (standard) and AM-MSK mode (optional). The followingspecifications apply to both modes unless stated otherwise.Transmitter RF CharacteristicsRF Power OutputThe RF carrier output power is adjustable in 1 W steps from 5 W to 50 W (as an option, the maximumselectable power can be limited). Output power is automatically controlled under the following conditions:Frequency range Variations in power remain within -0 to +1 dB over the operational frequency range.Low supply voltage Variations in power remain within ±1 dB for supply voltages between 24 Vdc and 32 Vdc.High VSWR Loop error can reduce power progressively by up to 3 dB. Variations in power remain within ±1 dB into a VSWR of up to 2.5:1. At a VSWR greater than this the output power may be reduced by 10 dB ±1 dB.High RF PA temperature If the RF PA temperature sensor exceeds 80°C the output power is reduced by 3 dB ±1 dB. If the RF PA temperature sensor exceeds 90°C the transmitter is de-keyed and automatically re-keyed at 70°C.Duty CycleAll variants 100% continuous operation.Channel SpacingAM-Voice mode The transmitters are capable of both 25 kHz channel spacing and 8.33 kHz channel spacing.AM-MSK mode 25 kHz.Offset CarrierNon-HS variants (AM-Voice) The non-HS T6T is capable of offsetting the carrier frequency to provide 2, 3 and 4 carrier offset.HS variants (AM-Voice) The HS T6T is capable of offsetting the carrier frequency to provide 2, 3, 4 and 5 carrier offset.AM-MSK mode Offset carrier is not available.Harmonic OutputsAll variants Second harmonic outputs are less than -36 dBm, third harmonic outputs are less than -46 dBm and fourth harmonic outputs and above up to 4 GHz, are less than -56 dBm.
T6T 50 W VHF Transmitter Page 5 SpecificationBack to TransmitterMain PageSpurious OutputsAll variants The spurious outputs are less than -46 dBm for modulation depths up to 90%, measured at greater than 500 kHz from carrier in the frequency range 9 kHz to 4 GHz. There are no coherent spurious outputs above the spectral mask at less than 500 kHz.IntermodulationAll variants Intermodulation products, caused by an interfering signal with the same power as the transmitter isolated by 30 dB, are at least -40 dBc at ≥±150 kHz and -50 dBc at ≥±500 kHz.Transmitter Modulation CharacteristicsThe transmitter modulation characteristics are as follows:ModeAM-Voice AM-Voice mode uses Double Sideband (DSB) Amplitude Modulation (AM) full carrier; emission designator 6K80A3EJN for 25 kHz channels and 5K00A3EJN for 8.33 kHz channels.AM-MSK AM-MSK mode uses Double Sideband (DSB) Amplitude Modulation (AM) full carrier; emission designator 13K0A2DJN.Modulation DepthAll variants The transmitter is capable of modulation depths up to 95%.Hum and NoiseAll variants The hum and noise is more than 45 dB below the signal level for line input levels <-13 dBm, and more than 50 dB below the signal level for line input levels ≥-13 dBm, for a carrier modulated by a 1 kHz signal with a modulation depth of 90%.Frequency Response25 kHz channel spacing AM-Voice and AM-MSK: The variation in frequency response with reference to a 1 kHz signal is within +0.5 dB and -1.5 dB across the frequency range 300 to 3400 Hz. The response is also less than -20 dB at 100 Hz and below, and less than -30 dB at 4 kHz and above.8.33 kHz channel spacing AM-Voice only: The variation in frequency response with reference to a 1 kHz signal is within +0.5 dB and -1.5 dB across the frequency range 350 Hz to 2500 Hz. The response is also less than -10 dB at 100 Hz and below, and less than -30 dB at 3200 Hz and above.Distortion25 kHz channel spacing The total harmonic distortion is less than 5% due to signals with a modulation depth of 90%, within the frequency range 300 Hz to 3400 Hz.8.33 kHz channel spacing AM-Voice only: The total harmonic distortion is less than 5% due to signals with a modulation depth of 90%, within the frequency range 350 Hz to 2500 Hz.
T6T 50 W VHF Transmitter Page 6 SpecificationBack to TransmitterMain PageResidual FMAll variants For a test signal of 1 kHz set at 80% modulation depth applied to the line input of the transmitter, the unwanted peak frequency modulation does not exceed ±500 Hz.VOGADAM-Voice The VOGAD has an operational range of 30 dB. The VOGAD can be disabled.AM-MSK The VOGAD is disabled.MuteAM-Voice The mute level is set at 15 dB below the average speech line level setting. The mute can be disabled.AM-MSK The mute is disabled.Differential Group DelayAM-MSK There is less than 60 µs differential group delay for signals in the range 1200 to 2400 Hz.Transmitter ControlTransmitter control characteristics are as follows:Audio InputsAll variants Voice can be connected to the transmitter via the front panel microphone connector. Voice can also be connected via the line inputs. Line level setting from -30 to +10 dBm.PTT Time OutAll variants The time out period is adjustable from 2 to 510 seconds in 2 second steps or can be disabled.
T6T 50 W VHF Transmitter Page 7 SpecificationBack to TransmitterMain PageMode 2This section gives the transmitter’s specification applicable to Mode 2 operation. Mode 2 parameters areidentical to AM-Voice mode parameters with the following exceptions:RF Power Rise TimeAll models The transmitter produces more than 90% of full power output within the first 2 symbols of the power stabilization segment, which is the first segment of the training sequence and consists of 4 symbols each representing 000.RF Power Decay TimeAll models The output power decays by more than 20 dB within 2.5 symbols of the middle of the final symbol.Channel SpacingAll models 25 kHz channel spacing only.Transmitter Modulation CharacteristicsModeAll models Mode 2 uses Carrier Sense Multiple Access (CSMA) differentially encoded 8-phase shift keying (D8PSK), using a raised cosine filter with α=0.6 (nominal value), emission designator 14K0G1DE. Information is differentially encoded with 3 bits per symbol transmitted as changes in phase rather than absolute phase. The data stream is divided into groups of 3 consecutive data bits, least significant bit first. Zeros are padded to the end of transmissions if needed for the final channel symbol.Modulation RateAll models The symbol rate is 10,500 symbols/second (±0.005%), resulting in a nominal bit rate of 31,500 bits/s.RMS Phase ErrorAll models The RMS phase error is less than 3°. The error vector magnitude is less than 6%.Phase AccelerationAll models The total frequency change during the transmission of the unique word is less than 10 Hz. After this, the phase acceleration is less than 500 Hz/s.
T6T 50 W VHF Transmitter Page 8 SpecificationBack to TransmitterMain PageMode 3This section gives the transmitter’s specification applicable to Mode 3 operation. Mode 3 parameters areidentical to AM-Voice mode parameters with the following exceptions:RF Power Rise TimeAll models The transmitter produces more than 90% of full power output within the first 2 symbols of the power stabilization segment, which is the first segment of the training sequence and consists of 4 symbols each representing 000.RF Power Decay TimeAll models The output power decays by more than 20 dB within 2.5 symbols of the middle of the final symbol.Channel SpacingAll models 25 kHz channel spacing only.Transmitter Modulation CharacteristicsModeAll models Mode 3 uses Time Division Multiple Access (TDMA) differentially encoded 8-phase shift keying (D8PSK), using a raised cosine filter with α=0.6 (nominal value), emission designator 14K0G7WET. Information is differentially encoded with 3 bits per symbol transmitted as changes in phase rather than absolute phase. The data stream is divided into groups of 3 consecutive data bits, least significant bit first. Zeros are padded to the end of transmissions if needed for the final channel symbol.Modulation RateAll models The symbol rate is 10,500 symbols/second (±0.005%), resulting in a nominal bit rate of 31,500 bits/s.RMS Phase ErrorAll models The RMS phase error is less than 3°. The error vector magnitude is less than 6%.Phase AccelerationAll models The total frequency change during the transmission of the unique word is less than 10 Hz. After this, the phase acceleration is less than 500 Hz/s.End of document
Back to TransmitterMain PageOperationThis document describes the controls, indicators, setting up and operating instructionsapplicable to the T6T VHF Multimode Transmitter.
T6T VHF 50 W Transmitter Page 2 OperationBack to TransmitterMain PageControls, Indicators and Front Panel ConnectorsThis part details the purpose of all controls and indicators of the T6T transmitters.Front PanelThe front panel’s controls, indicators and connectors are shown below and detailed in the followingparagraphs.Scroll/Select Switch and LCDThe Scroll/Select switch is used in conjunction with the LCD to select most of the transmitter's operationalsettings. Use of the switch and LCD is fully detailed in this section applicable to the particular operatingmode. During normal operation, the LCD shows the operating frequency, the channel number (if thechannel store facility is used), the carrier offset (if used), and displays a graphical representation ofinstantaneous peak power.The example LCD screen above shows the transmitter operating on 118.000 MHz; the frequency hasbeen preset as channel 100 and offset at +7.3 kHz.Ready IndicatorA green indicator that lights when the transmitter is ready for use and no BIT faults have been detected.Transmit IndicatorAn amber indicator that lights when the transmit circuit is keyed and producing output power.Alarm IndicatorA red indicator that either flashes, or lights, when a BIT fault has been detected. BIT indications areclassified as either Alarms or Alerts.If an ‘alert’ condition is detected, the Alarm indicator flashes, the Ready indicator remains lit, and thetransmitter remains operational. A BIT ‘alert’ is indicated if:❑If the transmitter RF output power has reduced from its setting by more than 1 dB but not morethan 3 dB.❑If the supply volts falls below a pre-defined level.Any other BIT condition results in an alarm. When detected, the Alarm indicator lights and the Readyindicator becomes unlit; the transmitter cannot be used.READYALARMTRANSMITSTANDBY SCROLL/SELECTMICROPHONE/DIAGNOSTICSREFERENCEF r e q 1 1 8 .0 0 0 M H zC h 1 0 0 + 7 . 3 k H zP w r Scroll/Select SwitchLCDM o d e A M V o i c e 1
T6T VHF 50 W Transmitter Page 3 OperationBack to TransmitterMain PageStandby IndicatorA red indicator that lights when the transmitter is in standby mode. When in standby mode, most of theradio's circuits are inactive, the front panel LCD is blanked, and the transmitter cannot be keyed.Standby mode is selected and deselected using the front panel Scroll/Select switch and LCD, by initiatingan instruction through a MARC system, through a T6 controller or through the VFP. For details of frontpanel selection and deselection see page 13.Reference ConnectorAn SMB jack socket that allows a frequency counter to monitor the transmitter's reference frequency.This connector is used only for maintenance purposes. The instructions for checking and adjusting thereference frequency are given in the Maintenance section.Microphone/Diagnostics ConnectorA dual purpose connector that allows either a microphone, or a PC, to be connected to the transmitter.The connector is a 7-pin self-locking DIN socket; the pin-out is shown in Table 1.A microphone is fitted to this connector to enable the transmitter to be operated in AM local mode. Theconnections are detailed in Table 1. A PC can also be connected to allow the VFP to be displayed. Usingthe VFP is detailed in the Maintenance section. The PC connections at the transmitter are shown inTable 2 on page 4.Table 1 Microphone/Diagnostics Connector - Audio ConnectionsPinNumber Signal Input or Output Description1 Microphone ground - 0 V.3 Microphone PTT Input 0 V to PTT.5 Sidetone Output 0 to 3 V pk-pk.6 Microphone input Input 2 to 35 mV rms on Passive setting and 8 to 140 mV rms on Active setting to remain in VOGAD range.7 Ground - 0 V. Viewed from front
T6T VHF 50 W Transmitter Page 4 OperationBack to TransmitterMain PageRear Panel Power SwitchThe rear panel's power switch is a 2-way rocker switch used to select between power on, and standby.When the POWER SWITCH is set to the Standby position, dangerous voltages are stillpresent in the transmitter's internal power supply circuitry. To ensure safe working, thetransmitter must be isolated from the ac and dc input supplies.Table 2 Microphone/Diagnostics Connector - PC ConnectionsPinNumber Signal Input or Output Description2 Transmit data Output RS232, 115200 baud, 8 data bits, 1 stop bit, no parity, no handshaking.4 Receive data Input RS232, 115200 baud, 8 data bits, 1 stop bit, no parity, no handshaking.7 Ground - 0 V.WARNING Dangerous Voltages= Standby= On
T6T VHF 50 W Transmitter Page 5 OperationBack to TransmitterMain PageSetting Up and OperationIntroductionSetting up the transmitter involves selecting various parameters using the Virtual Front Panel (VFP),through a Multi-Access Remote Control (MARC) system, from a T6 controller, or from the transmitter’sfront panel. The transmitter can be configured for remote or local use.Table 9 on page 30 details the functions and parameters that can be set from all these sources.The rest of this document details how to configure the transmitter from the front panel, and how to operatethe radio in local mode.Selecting most of the transmitter's operational settings is carried out using the front panel Scroll/Selectswitch and the LCD (see the illustration below). No attempt to set up the transmitter should be made untilthe transmitter has been installed as per the installation procedures given in the Installation section.Normal OperationDuring normal operation, the LCD displays the Main screen. This screen shows the operating frequency,the channel number (if the channel store facility is used), the carrier offset (if used), and displays agraphical representation of output power when the transmitter is keyed. If the transmitter has been set toStandby mode, which is shown by the front panel Standby indicator being lit, the LCD is blanked.Using the Scroll/Select SwitchThe Scroll/Select switch (referred to throughout this section as the ‘Switch’) is used to leave the Mainscreen and display the Control screen (see page 8). Further use of the Switch displays various selectionmenus and allows the required parameters to be set. The switch has three actions: it can be turnedclockwise, anti-clockwise, or momentarily pushed in.READYALARMTRANSMITSTANDBY SCROLL/SELECTMICROPHONE/DIAGNOSTICSREFERENCEF r e q 1 1 8 .0 0 0 M H zC h 1 0 0 + 7 . 3 k H zP w r Scroll/Select SwitchLCDM o d e A M V o i c e 1
T6T VHF 50 W Transmitter Page 6 OperationBack to TransmitterMain PageScreen ProtocolThe following protocol is applicable to all screens described in this document.Main Screen During normal operation, the Main screen (an example of which is shown below whilst the transmitter is transmitting) is displayed.Switch Refers to the front panel Scroll/Select switch. The switch is turned clockwise to scroll through fields from left to right, and from top to bottom. The switch is turned anti-clockwise to scroll through fields from right to left, and from bottom to top. The switch is pressed to make a selection.Time out If during any setting up procedure the Scroll/Select switch is not operated for 30 seconds, the display returns to the Main screen. If editing any parameter has not been completed, the transmitter stays on the original setting.>> Indicates more fields are available other than those currently displayed. To access those fields, turn the switch clockwise through the last displayed field.<< Indicates more fields are available other than those currently displayed. To access those fields, turn the switch anti-clockwise through the first displayed field.Back When Back is selected, you are returned to the previous menu.Exit When Exit is selected, you are returned to the Main screen.Menu SystemThe front panel control of the radio is implemented through a hierarchical menu system as shown on thefollowing page. F r e q 1 1 8 . 0 0 0 M H zC h 1 0 0 + 7 . 3 k H zM o d e A M V o i c ePwr IIIIIIIIII
T6T VHF 50 W Transmitter Page 7 OperationBack to TransmitterMain Page Menu SystemF r e q 1 1 8 . 0 0 0 M H zCh100M o d e A M V o i c ePwr IIIIIIIIIISettingsSet the transmitter operational settingsBITInitiate a BIT test and view resultsStandbyEnter or Exit standby modeRef FreqAdjust the transmitter reference frequencyBand EdgesSet up the transmitter band edgesPolaritiesSet the active polarity for certain hardwire connections BacklightAdjust the display’s backlightAM-Voice ModeSettings(see page 16)AM-MSK ModeSettings(see page 18)Digital Modes(see page 19)Mode and Mode SettingsSelect ModeMenu Lock Screen(see page 8)Main Screen(Example)Displayed during normal transmitter operationFrequencySet the transmitter operating frequencyChannelSet or recall up to 100 preset frequency channelsControl ScreenConfigure the transmitter operating parameters, access the BIT facility or view the software configuration.S/W ConfigView the transmitter software configuration
T6T VHF 50 W Transmitter Page 8 OperationBack to TransmitterMain PageMenu Lock ScreenA security facility available only from the VFP allows the transmitter's front panel to be ‘locked’. Whenthis facility is active, no operational settings can be made from the front panel until an ‘unlock’ commandis sent from the VFP.The following screen is displayed when ‘lock’ is active, and the front panel switch is pressed.To exit the system lock screen:❑Select OK, then press the switch. You are returned to the Main screen.or,❑Wait for the 30 second time-out to expire. You are returned to the Main screen.Control ScreenThe Control screen is entered from the Main screen by pressing the switch. The following screen isdisplayed:S E C U R I T Y M E S S A G EF r o n t P a n e lL o c k e dO KF r e q u e n c yChannelS e t t i n g sE x i t > >B I TS / W C o n f i gS t a n d b yE x i t < <Change the transmitter’s operating frequency.Store or recall preset channel frequencies.Select operating mode and mode settings.Initiate a BIT test and view results.View software configuration.Enter or exit standby mode.
T6T VHF 50 W Transmitter Page 9 OperationBack to TransmitterMain PageNotes for Setting Up the TransmitterThe following notes should be read before setting up the transmitter. They advise on the specialfrequency display when using 8.33 kHz channel spacing, and give guidance on the optimum line levelsettings. Note that for operation in the United States of America, this equipment is certified only foroperation using 25 kHz channel spacing.Front Panel Display for 25 kHz and 8.33 kHz Channel SpacingWhen setting the operating frequency of the transmitter and 8.33 kHz channel spacing is required, thedisplayed frequency differs from the actual channel frequency. Table 3 shows the pattern used for25 kHz and 8.33 kHz spaced channel frequencies from 118.000 MHz to 118.141 MHz. The pattern is thesame for any frequency within the transmitter's frequency range. The display conforms to ICAOconvention for 8.33 kHz operation.Line Level SettingsThe input line level setting displayed on the front panel is equivalent to the average speech level with apeak-to-average ratio of 13 dB. This corresponds to the level specified for the lines.When testing the transmitter using a sine wave, the line input level should be set to 10 dB above the linelevel setting. The VOGAD and mute thresholds are pre-set at 10 dB and 15 dB respectively below theline level setting.Table 4 shows the relationship between the input line level, VOGAD threshold and mute threshold.Table 3 25 kHz and 8.33 kHz Channel Spacing DisplaysActual Frequency(to 4 decimal places) Channel Spacing Displayed Frequencyat Transmitter's Front Panel118.0000 MHz118.0000 MHz118.0083 MHz118.0166 MHz118.0250 MHz118.0250 MHz118.0333 MHz118.0416 MHz118.0500 MHz118.0500 MHz118.0583 MHz118.0666 MHz118.0750 MHz118.0750 MHz118.0833 MHz118.0916 MHz118.1000 MHz118.1000 MHz118.1083 MHz118.1166 MHz118.1250 MHz118.1250 MHz118.1333 MHz118.1416 MHz25 kHz8.33 kHz8.33 kHz8.33 kHz25 kHz8.33 kHz8.33 kHz8.33 kHz25 kHz8.33 kHz8.33 kHz8.33 kHz25 kHz8.33 kHz8.33 kHz8.33 kHz25 kHz8.33 kHz8.33 kHz8.33 kHz25 kHz8.33 kHz8.33 kHz8.33 kHz118.000 MHz118.005 MHz118.010 MHz118.015 MHz118.025 MHz118.030 MHz118.035 MHz118.040 MHz118.050 MHz118.055 MHz118.060 MHz118.065 MHz118.075 MHz118.080 MHz118.085 MHz118.090 MHz118.100 MHz118.105 MHz118.110 MHz118.115 MHz118.125 MHz118.130 MHz118.135 MHz118.140 MHz
T6T VHF 50 W Transmitter Page 10 OperationBack to TransmitterMain PageChanging the Transmitter’s Operating FrequencyThe transmitter’s frequency can be changed in two ways: either from the frequency screen, or byrecalling a preset channel. This procedure details using the Frequency screen.Table 4 Relationship Between Line Level, VOGAD Threshold and Mute ThresholdLine Level Setting (dBm) Average Speech Level (dBm) Sine Wave Level (dBm) VOGAD Threshold (dBm) Mute Threshold (dBm)+10 +10 +20 0 -5+5 +5 +15 -5 -1000+10-10-15-5 -5 +5 -15 -20-10 -10 0 -20 -25-15 -15 -5 -25 -30-20 -20 -10 -30 -35-25 -25 -15 -35 -40-30 -30 -20 -40 -45F r e q 1 1 8 . 0 0 0 M H zC a n c e l O K(1) From the Control screen, selectfrequency to display the Frequencyscreen.(2) Turn the switch to highlight the digit tobe changed, then press the switch.(3) Turn the switch until the required digitis shown, then press the switch.(4) Repeat until the required frequency isshown, then highlight OK and press theswitch.(5) Only frequencies that fall between theband edge settings can be selected.
T6T VHF 50 W Transmitter Page 11 OperationBack to TransmitterMain PageTo Store and Recall Frequency ChannelsUp to 100 frequency channels can be stored in the transmitter.C h 1 0 0F r e q 1 2 1 . 5 0 0 M H zR e c a l lB a c k E x i tC h 1 0 0F r e q 1 1 8 . 0 0 0 M H zS t o r eB a c k E x i tC h 1 0 0F r e q 1 1 8 . 0 0 0 M H zI nn v a l i d f o r M o d eB a c k E x i tC h 1 0 0F r e q 1 1 8 . 0 0 0 M H zO u t s i d e B a n d E d g eB a c k E x i tTo store a Channel Frequency(1) From the Control screen, selectChannel to display the Channelscreen. Highlight Channel, press theswitch and then turn it until the requiredchannel number is displayed; press theswitch.(2) Highlight the MHz frequency value(see Example 2) press the switch andthen turn it until the required MHz valueis shown. Press the switch.(3) Highlight the kHz frequency value (seeExample 3), press the switch and thenturn it until the required kHz value isshown. Press the switch.(4) Highlight Store and press the switch.The new frequency is now stored in theselected channel number.To recall a Stored Frequency Channel(1) From the Control screen, selectChannel to display the Channelscreen.(2) To make the transmitter operate onany preset channel frequency,highlight Channel and press the switch.Turn the switch until the requiredchannel number/frequency isdisplayed, then press the switch.(3) Turn the switch to highlight Recall, thenpress the switch. Exit the screen. Thetransmitter now operates on therecalled channel frequency.Notes:If a frequency outside the band edge limits isentered, a message (see Channel Screen -Example 3) is displayed.If a frequency not valid for the mode ofoperation is entered, a message (see ChannelScreen - Example 4) is displayed.Channel Screen - Example 1Channel Screen - Example 2Channel Screen - Example 3Channel Screen - Example 4
T6T VHF 50 W Transmitter Page 12 OperationBack to TransmitterMain PageTo Initiate a BIT TestUse the following procedure to initiate an interruptive BIT test from the transmitter's front panel. A BITtest cannot be initiated while the transmitter is keyed. After a BIT test has been run, the BIT screen isdisplayed (see AM-Voice and AM-MSK BIT Screen on page 24). An interruptive BIT test cannot beinitiated in Mode 2 or Mode 3.(1) From the Main screen, press the switch to display the Control screen. Turn the switch until BITis highlighted. Press the switch.(2) Ensure the BIT menu is displayed. Turn the switch until BIT Initiate is highlighted. Press theswitch.(3) During the test, which takes approximately two seconds, the Testing screen is displayed.B I T I n i t i a t eE T I 0 0 0 0 0 : 0 0 h r sA C S u p p l y O NE x i t > >T e s t i n gP l e a s e W a i tDuring an interruptive BIT test, the transmitter radiates modulated carrier waves at the set power.Users should therefore obtain the necessary authority before initiating a test.If the test is to be carried out with the antenna disconnected, ensure a load is fitted to thetransmitter's antenna connector.In order to test the line input stages, an internally generated 1 kHz tone is injected into the line inputcircuit. Any other audio present on the line input will cause the test to be inaccurate. Therefore thetransmitter must not be keyed during the test.B I TS / W C o n f i gS t a n d b yE x i t < <
T6T VHF 50 W Transmitter Page 13 OperationBack to TransmitterMain Page(4) On completion, and if the interruptive test was initiated from the front panel, one of the followingscreens will be shown.(5) Selecting OK takes the user back to the BIT screen.(6) Selecting OK takes the user back to the BIT screen. The user can then scroll through the screento check out transmitter parameters for failure.Standby ModeStandby mode is a power saving feature that can be used for non-operational transmitters. When instandby mode, most of the transmitter's circuits are inactive, the LCD is blanked, and the transmittercannot be keyed. To put the transmitter into standby mode, use the following procedure.When the transmitter is in Standby mode, the red front panel Standby indicator is lit.To Enter Standby ModeTo Exit Standby ModeT e s t S t a t u sPASSO KT e s t S t a t u sF A I LO KE n t e r S t a n d b y ?Y e s N o(1) From the Control screen selectStandby.(2) At the Standby screen, select Yes.(3) Check that the display blanks andthe front panel Standby indicator islit.E x i t S t a n d b y ?Y e s N o(1) Press the Switch.(2) Select Yes.(3) Check that the Main screen isdisplayed and that the front panelStandby indicator is unlit.
T6T VHF 50 W Transmitter Page 14 OperationBack to TransmitterMain PageSettingsOperational settings for the T6T VHF transmitter are configured at the front panel, through the VFP, andthrough an associated MARC system (or compatible control system). Some settings can also be maderemotely via a T6 controller. The Settings screen is entered from the Control screen.The settings that can be selected at the front panel Settings screen are:❑Mode - either AM-Voice, AM-MSK, Mode 2 or Mode 3❑Mode Settings - allows the selected mode parameters to be set❑Polarities❑Band edges❑Backlight ❑Reference frequency.Note that the mode selection, reference frequency and backlight are set from this screen. When modesettings, polarities and band edges are selected the user is taken to other screens. General and mode specific settings, showing default values, are referenced in Table 5 on page 15. Clickon any required parameter by page number for further references.M o d e A M V o i c eM o d e S e t t i n g sP o l a r i t i e sE x i t > >Band EdgesR e f F r e q 5 0 . 0 %B a c k l i g h t 0 3 0 sE x i t < < > >B a c kE x i tSelect between AM-Voice, AM-MSK, Mode 2 or Mode 3.Select to take you to the mode specific Settings menu.Select to take you to the Polarities menu.Set the transmitter’s frequency band edges.Align the transmitter’s reference frequency (Note 1).Adjust the LCD’s backlight time out (Note 2).Notes:1.Setting the transmitter’s reference frequency is a maintenance operation. The current value shouldnot be reset unless the correct test equipment is connected. See the Maintenance section.2.The LCD’s backlight can be set for permanently on, off, or timed to stay on for a period between15 and 120 seconds.
T6T VHF 50 W Transmitter Page 15 OperationBack to TransmitterMain PageTable 5 Operational Settings from the Front PanelParameter Mode Adjustment Range Factory Default Setting Further ReferenceMenu lock screen All Locked or unlocked Unlocked page 8Enter standby modeAll Yes or No - page 13Exit standby mode All Yes or No - page 13Set mode ofoperationAll AM-voice, AM-MSK, Mode 2 or Mode 3AM-voice page 14Set polarities AM-voice,AM-MSKSTD or INV STD page 20Band edges All 118.000 to 136.975 MHzor112.000 to 155.975 MHz118.000 and 136.975 MHzor112.000 and 155.975 MHzpage 28LCD Backlight All 15 to 120 s, On or Off 30 s page 14RF power All 5 to 50 W 50 W page 16Audio line in level AM-voice,AM-MSK -30 to +10 dBm -13 dBm page 16 and page 18 Inhibit AM-voice,AM-MSKOn or Off Off page 16 and page 18PTT (key) AM-voice,AM-MSK On (key), Off (de-key) Off page 16 and page 18Tx time out AM-voice,AM-MSK2 to 510 s or Off 180 s page 16 and page 18Modulation depth AM-voice,AM-MSK 5 to 95% 85% page 16 and page 18Mute AM-voice On or Off On page 16VOGAD AM-voice On or Off On page 16Antenna C/O delay AM-voiceAM-MSKOn or Off OnOffpage 16page 18Offset AM-voice 0, ±2.5, ±5, ±7.3, ±7.5 kHz(additionally, ±4 and ±8 kHz on HS models)0 (No offset) page 17Step AM-voice 8.33 kHz, 25 kHz or both 25 kHz page 17Mic AM-voice Active or Passive Passive page 17Key priority AM-voice,AM-MSKLocal-Remote orRemote-LocalLocal-Remote page 17 and page 18Local PTT AM-voice,AM-MSKEnabled or Disabled Enabled page 17 and page 18Remote PTT AM-voice,AM-MSKEnabled or Disabled Enabled page 17 and page 18Remote phantom PTTAM-voice,AM-MSKEnabled or Disabled Enabled page 17 and page 18
T6T VHF 50 W Transmitter Page 16 OperationBack to TransmitterMain PageAM Voice Settings ProcedureDuring this procedure, the following parameters, applicable to AM-voice operation, can be set:❑RF power output❑Audio line input level❑Inhibit❑PTT on (key) or off (de-key)❑Transmitter time out❑Modulation depth❑Mute (on or off)❑VOGAD (on or off) ❑Antenna c/o delay (on or off)❑Offset❑Step❑Mic❑Key priority (local or remote)❑Enable or disable local PTT❑Enable or disable remote PTT❑Enable or disable remote phantom PTT.AM Voice Mode Settings ScreenThe AM-voice mode setting screen is accessed from the Settings screen. Use the Scroll/Select switch toselect the parameter, then enter the required setting(s).P o w e r 5 0 WL i n e I n - 1 3 d B mI n h i b i t O F FE x i t > >P T T O F FT X T i m e o u t 1 8 0 sM o d D e p t h 8 5 %E x i t < < > >M u t e O NV O G A D O NA n t C / O D e l O NE x i t < < > >AdjustmentsRF power between 5 W to 50 W.Audio line in level between -30 to +10 dBm.On or Off.On (key), Off (de-key).2 to 510 s.5 to 95%.On or Off.On or Off.On or Off.
T6T VHF 50 W Transmitter Page 17 OperationBack to TransmitterMain PageO f f s e t 0 . 0 k H zS t e p 2 5 k H zM i c P A S S I V EE x i t < < > >K e y P r i o r i t y L - RL o c a l P T T E NR e m o t e P T T E NE x i t < < > >R e m P h a n P T T E NB a c kE x i t < <Adjustments0, ±2.5, ±5, ±7.3, ±7.5, (or ±4, ±8 HS only) kHz.25 kHz, 8.33 kHz or both.Active or Passive.Local-remote or Remote-local.Enabled or Disabled.Enabled or Disabled.Enabled or Disabled.Return to screen.
T6T VHF 50 W Transmitter Page 18 OperationBack to TransmitterMain PageAM-MSK Mode Settings ProcedureDuring this procedure, the following parameters, applicable to AM MSK operation, can be set:❑RF power output❑Audio line input level❑Inhibit❑PTT on (key) or off (de-key)❑Transmitter time out❑Modulation depth❑Antenna c/o delay (on or off)❑Key priority (local or remote)❑Enable or disable remote PTT❑Enable or disable remote phantom PTT.AM-MSK Mode Settings ScreensThe AM-MSK mode setting screen is accessed from the Settings screen. Use the Scroll/Select switch toselect the parameter, then enter the required setting(s).P o w e r 5 0 WL i n e I n - 1 3 d B mI n h i b i t O F FE x i t > >P T T O F FT X T i m e o u t 1 8 0 sM o d D e p t h 8 5 %E x i t < < > >A n t C / O D e l O NK e y P r i o r i t y L - RL o c a l P T T E NE x i t < < > >R e m o t e P T T E NR e m P h a n P T T E NB a c kE x i t < <AdjustmentsRF power between 5 W to 50 W.Audio line in level between -30 to +10 dBm.On or Off.On (key), Off (de-key).2 to 510 s.5 to 95%.On or Off.Local-remote or Remote-local.Enabled or Disabled.Enabled or Disabled.Enabled or Disabled.
T6T VHF 50 W Transmitter Page 19 OperationBack to TransmitterMain PageMode 2 Settings ScreenThis is an advisory screen. Pressing OK returns the user to the Main screen.Mode 3 Settings ScreenThis is an advisory screen. Pressing OK returns the user to the Main screen. M o d e 2 p a r a m e t e r sa r e s e t v i a t h eH L D C i n t e r f a c eO KM o d e 3 p a r a m e t e r sa r e s e t v i a t h eT 1 / E 1 i n t e r f a c eO K
T6T VHF 50 W Transmitter Page 20 OperationBack to TransmitterMain PagePolarities Screens AM-Voice and AM-MSKA number of remote indication and control signals can be hard-wire connected to the transmitter. Thesesignals include a transmitter ready indication, a PTT control signal, a phantom PTT control signal, a PTTout indication, a transmitter inhibit control signal, a BIT test initiation control signal, an external VSWRfault indication and antenna C/O. The following paragraphs detail the signals applicable to theoperational mode of the transmitter.The Polarities screen is accessed from the Settings screen.AM-Voice and AM-MSK Polarity SettingsR e a d y O u t S T DE - B I T I n S T DI n h i b i t I n S T DE x i t > >B I T S t a r t I n S T DP T T R e f + 1 4 VP T T I n S T DE x i t > >P h a n P T T I n S T DP T T O u t S T DF a s t P T T O u t S T DE x i t < < > >E x t V S W R I n S T DA n t C / O O u t S T DB a c kE x i t < <Each of ten polarity settings applicable toAM-voice and AM-MSK can be set to the defaultSTD (standard) setting or INV (inverted).The signal connections are shown in Table 6 onpage 21 along with the conditions when STD orINV is selected.The settings for the PTT Reference voltage arealso shown in Table 6.
T6T VHF 50 W Transmitter Page 21 OperationBack to TransmitterMain PageTable 6 AM-Voice and AM-MSK Polarity SettingsSignal Connector Polarity set to STD Polarity set to INVReady Out Facilities, pin 13 An open collector grounded output when the radio is ready to transmit and no BIT faults are detected.An open collector high impedance output when the radio is ready to transmit and no BIT faults are detected.E-BIT In Facilities, pin 2 TTL input. 0 V indicates an external fault.TTL input. 5 V indicates an external fault.Inhibit In Facilities, pin 10 TTL input. 0 V inhibits transmitter operation.TTL input. 5 V inhibits transmitter operation.BIT Start In Facilities, pin 11 TTL input. 0 V initiates an interruptive BIT test.TTL input. 5 V initiates an interruptive BIT test.PTT In MARC, pin 4MARC Audio, pin 6Active when input differs from reference by more than ±10 V. Inactive when input differs from reference by less than ±1 V. Maximum input level ±60 V with respect to reference. Input will draw no more than 6 mA, requires at least 1 mA to operate. Active when input differs from reference by less than ±1 V. Inactive when input differs from reference by more than +10 V. Maximum input level +60 V with respect to reference. Input will draw no more than 6 mA, requires at least 1 mA to operate.Phantom PTT In MARC orMARC Audio, pin 2Active when input differs from reference by more than ±10 V. Inactive when input differs from reference by less than ±1 V. Maximum input level ±60 V with respect to reference. Input will draw no more than 6 mA, requires at least 1 mA to operate. Active when input differs from reference by less than ±1 V. Inactive when input differs from reference by more than +10 V. Maximum input level +60 V with respect to reference. Input will draw no more than 6 mA, requires at least 1 mA to operate.PTT Out Facilities, pin 3 Grounding solid state relay. +60 to -60 V, ac or dc, 100 mA max, n/o. Activated 20 ms(±1 ms) before the start of the power ramp up to allow for the antenna relay to pull-in time.Grounding solid state relay. +60 to -60 V, ac or dc, 100 mA max, n/c. Activated 20 ms(±1 ms) before the start of the power ramp up to allow for the antenna relay to pull-in timeExternal VSWR InputFacilities, pin 4 TTL input. 0 V active. TTL input. 5 V active.Antenna ChangeoverFacilities, pin 5(Common pin 6)Solid state relay. +60 to -60V, ac or dc, 100 mA max, n/o. Activated 35 ms (±1 ms) before the start of the power ramp up to allow for the antenna relay pull-in time.Common 0 V.Solid state relay. +60 to -60V, ac or dc, 100 mA max, n/c. Activated 35 ms (±1 ms) before the start of the power ramp up to allow for the antenna relay pull-in time.Common 0 V.Continued >>
T6T VHF 50 W Transmitter Page 22 OperationBack to TransmitterMain PageFast PTT Output (antenna changeover) MARC Audio, pin 3 Open collector NPN transistor grounding output, 200 mA max, n/o).Open collector NPN transistor grounding output, 200 mA max, n/c.PTT Ref.-PTT Ref can be set to +14 V,0 V or -14 V. PTT state is:+14 V Ref. key ≤+4 V ≥+24 V unkey +13 to+15 V 0 V Ref. key ≤-10 V ≥+10 V unkey -1 V to +1 V-14 V Ref. key ≤-24 V ≥-4 V unkey -13 to -15 VMaximum input level ±60 V with respect to reference. Input will draw no more than 6 mA, and requires at least 1 mA to operate.PTT Ref can be set to +14 V,0 V or -14 V. PTT state is:+14 V Ref. unkey ≤+4 V ≥+24 V key +13to +15 V 0 V Ref. unkey ≤-10 V ≥+10 V key -1 V to +1 V-14 V Ref. unkey ≤-24 V ≥-4 V key -13 to -15 V Maximum input level ±60 V with respect to reference. Input will draw no more than 6 mA, and requires at least 1 mA to operate.Table 6 AM-Voice and AM-MSK Polarity Settings (Continued)Signal Connector Polarity set to STD Polarity set to INV
T6T VHF 50 W Transmitter Page 23 OperationBack to TransmitterMain PageMode 2 and Mode 3 Polarity SettingsTable 7 Mode 2 and Mode 3 Polarity SettingsSignal Connector Polarity set to STD Polarity set to INVReady Out Facilities, pin 13 An open collector grounded output when the radio is ready to transmit and no BIT faults are detected.An open collector high impedance output when the radio is ready to transmit and no BIT faults are detected.E-BIT In Facilities, pin 2 TTL input. 0 V indicates an external fault. TTL input. 5 V indicates an external fault.External VSWR InputFacilities, pin 4 TTL input. 0 V active. TTL input. 5 V active.R e a d y O u t S T DE - B I T I n S T DE x t V S W R I n S T DE x i t > >B a c kE x i t< <Each of the three polarity settings applicable toMode 2 and Mode 3 can be set to the default STD(standard) setting or INV (inverted).The signal connections are shown in Table 7along with the conditions when STD or INV isselected.
T6T VHF 50 W Transmitter Page 24 OperationBack to TransmitterMain PageAM-Voice and AM-MSK BIT ScreenThe AM-voice and AM-MSK BIT screen is accessed from the Control screen. B I T I n i t i a t eE T I 0 0 0 0 0 : 0 0 h r sA C S u p p l y O NE x i t > >D C S u p p l y O NS u p p l y 2 8 VS y n t h L o c k P A S SE x i t < < > >P A T e m p 5 0 d e g CP A C o o l i n g P A S SB a s e b a n d P A S SE x i t < < > >R F D r i v e P A S SP A O u t p u t P A S SP A L o o p P A S SE x i t < < > >M o d D e p t h P A S SR F F i l t e r s P A S SV S W R P A S SE x i t < < > >L o o p E r r o r P A S SA u d i o I n P A S SD S P 1 P A S SE x i t < < > >Select to initiate BIT test.Shows elapsed time 0:00 to 99999:59 (Hrs:Min).Shows state of ac supply (On or Off).PA temperature -20°C to +150°C.Pass or Fail.Pass, Fail or Not Tested. Pass, Fail or Not Tested.Pass, Fail or Not Tested. Pass, Fail or Not Tested.Shows state of dc supply (On or Off).dc supply 0 to 40 V, <21.6 V Alert, <19 V Alarm.Pass or Fail (Out-of-Lock).Pass, Fail or Not Tested.Pass, Fail or Not Tested.Pass, Fail or Not Tested.Pass or Fail.Pass, Fail or Not Tested.Pass or Fail.
T6T VHF 50 W Transmitter Page 25 OperationBack to TransmitterMain PageDSP2 PASSX i l i n x 1 P A S SX i l i n x 2 P A S SE x i t < < > >E E P R O M P A S SS t a r t U p P A S SC a l i b r a t i o n P A S SE x i t < < > >U n k e y e d P w r P A S SE - B I T P A S SM A R C A C T I V EE x i t < < > >H D L C I N A C T I V ET 1 / E 1 I N A C T I V EB a c kE x i t < <Pass or Fail.Pass or Fail.Pass or Fail.Pass or Fail.Pass or Fail.Active or Inactive.Pass or Fail.Pass or Fail.Pass or Fail.Active or Inactive.Active or Inactive.
T6T VHF 50 W Transmitter Page 26 OperationBack to TransmitterMain PageMode 2 and Mode 3 BIT ScreenThe Mode 2 and Mode 3 BIT screen is accessed from the Control screen.E T I 0 0 0 0 0 : 0 0 h r sA C S u p p l y O ND C S u p p l y O NE x i t > >S u p p l y 2 8 VS y n t h L o c k P A S SP A T e m p 5 0 d e g CE x i t < < > >P A C o o l i n g P A S SVSWR PASSL o o p E r r o r P A S SE x i t < < > >D S P 1 P A S SD S P 2 P A S SX i l i n x 1 P A S SE x i t < < > >X i l i n x 2 P A S SE E P R O M P A S SS t a r t U p P A S SE x i t < < > >C a l i b r a t i o n P A S SE - B I T P A S SM A R C A C T I V EE x i t < < > >Shows elapsed time 0:00 to 99999:59 (Hrs:Min).Shows state of ac supply (On or Off).Shows state of dc supply (On or Off).Shows value of dc supply.Synth lock (Pass or Fail).Indicates the PA temperature.Pass or Fail.Pass or Fail.Pass or Fail.Pass or Fail.Pass or Fail.Pass or Fail.Pass or Fail.Pass, Fail or Not Tested.Pass or Fail.Pass or Fail.Pass or Fail.Active or Inactive.H D L C I N A C T I V ET 1 / E 1 I N A C T I V EB a c kE x i t < <Active or Inactive.Active or Inactive.
T6T VHF 50 W Transmitter Page 27 OperationBack to TransmitterMain PageSoftware Configuration ScreensSoftware configuration screens are as follows:T 6 V H F 5 0 W T X1 1 8 - 1 3 6 . 9 7 5 M H zH i g h S t a b i l i t yE x i t > >B o o t S o f t w a r e65- xxxxxxxx/ vvE x i t < < > >B a s e S o f t w a r e65- xxxxxxxx/ vvE x i t < < > >M o d e S o f t w a r e65- xxxxxxxx/ vvE x i t < < > >F i l l 1 S o f t w a r e65- xxxxxxxx/ vv[ D e s c r i p t i o n ]E x i t < < > >F i l l 2 S o f t w a r e65- xxxxxxxx/ vv[ D e s c r i p t i o n ]E x i t < < > >Second line variation for WB radios reads 112-155.975 MHz.Third line variation for WB radios is blank.65-xxxxxxxx represents the software partnumber and /v v represents its version.65-xxxxxxxx represents the software partnumber and /v v represents its version.Current mode running. 65-xxxxxxxxrepresents the software part number and /v vrepresents its version.65-xxxxxxxx represents the software partnumber and /v v represents its version.65-xxxxxxxx represents the software partnumber and /v v represents its version.
T6T VHF 50 W Transmitter Page 28 OperationBack to TransmitterMain PageBand EdgesThe frequency range of the transmitter is 118 to 136.975 MHz for the B6350/NB version, or 112 to155.975 MHz for the B6350/WB version.If required, transmission can be limited to either one or two smaller parts of the frequency band by settingthe band edges BE1 to BE4. Transmission is possible between BE1 and BE2 frequencies, andfrequencies between BE3 and BE4. Table 8 Band Edge ValuesBE1 BE2 BE3 BE4B6350/NB set so that operation is over the full frequency range.118.000 136.975 118.000 136.975B6350/WB set so that operation is over the full frequency range.112.000 155.975 112.000 155.975Example: Transmitter set to transmit only those frequencies in the range 120 to 130 MHz.120.000 130.000 120.000 130.000Example: Transmitter set to transmit only those frequencies in the ranges 120 to 125 MHz and 130 to 135 MHz.120.000 125.000 130.000 135.000F i l l 3 S o f t w a r e6 5 - x x x x x x x x / v v[ D e s c r i p t i o n ]F i l l 4 S o f t w a r e6 5 - x x x x x x x x / v v[ D e s c r i p t i o n ]65-xxxxxxxx represents the software part numberand /v v represents its version.65-xxxxxxxx represents the software part numberand /v v represents its version.B E 1 1 1 8 . 0 0 0 M H zB E 2 1 3 6 . 9 7 5 M H zB E 3 1 1 8 . 0 0 0 M H zE x i t > >B E 4 1 3 6 . 9 7 5 M H zE x i t < <The Band Edge screen is accessed from theControl screen.Band edge frequencies can be set only inincrements of 25 kHz.If the transmitter is required to operate over thefull range, the band edge parameters must be setto the lowest and highest values in the range (seeTable 8).
T6T VHF 50 W Transmitter Page 29 OperationBack to TransmitterMain PageBIT Status Warning ScreensThe following shows some example BIT screens. These screens alternate with the Main screen when analert or alarm condition is present. Only the parameters causing the alert or alarm are displayed, and ifboth an alert and alarm condition exists simultaneously only the alarm information is displayed. If multipleparameters are signalling an alert or alarm condition, multiple screens are used to display the statusalternating with the Main screen. A L E R TS u p p l y 2 1 VA L E R TR F P o w e r R e d u c e dL o o p E r r o rS u p p l y 2 1 VA L E R TR F P o w e r R e d u c e dP A T e m p 8 5 d e g CA L A R MR F P o w e r R e d u c e dV S W R F A I LA L A R MR F P o w e r R e m o v e dL o o p E r r o r F A I LS u p p l y 1 8 VA L A R MR F P o w e r R e m o v e dP A T e m p 9 5 d e g CNo RF power reductionAlarm indicator flashingRF power reduced between 1 and 3 dBAlarm indicator flashing RF power reduced between 1 and 3 dBAlarm indicator flashingRF power reduced by more than 3 dBAlarm indicator onRF power shut downAlarm indicator onRF power shut downAlarm indicator on
T6T VHF 50 W Transmitter Page 30 OperationBack to TransmitterMain PageTable 9 Functions and ParametersFunction Front Panel VFP MARC T6 Controller T1/E1 HDLC Default SettingFREQUENCYChange frequency ✔✔✔ ✔ ✔✔ 118.000 MHzFREQUENCY CHANNELSStore/Recall preset frequency channels ✔✔✔ ✔ ✗✗ -SETTINGSSet modulation mode ✔✔✔ ✔ ✔✔ AM-VoiceRadio Settings (AM Modes):Set RF output power ✔✔✔ ✔ ✔✔ 50 WSet audio input line level ✔✔✔ ✗ ✔✗ -13 dBmSet inhibit on or off ✔✔✔ ✗ ✗✗ OffPTT test facilityon (key), off (de-key)✔✔View state ✗✔✗ OffSet Tx time out ✔✔✔ ✗ ✔✗ 180 sSet modulation depth ✔✔✔ ✔ ✔✗ 85%Set mute on or off(AM-Voice only) ✔✔✔ ✗ ✗✗ OnSet VOGAD onor off (AM-Voice only)✔✔✔ ✗ ✗✗ OnSet antenna C/O delay on or off ✔✔✔ ✗ ✗✗ AM-Voice - OnAM-MSK - OffSet frequency offset(AM-Voice only) ✔✔✔ ✗ ✗✗ 0 (No offset)Set frequency step size(AM-Voice only)✔✔✗ ✗ ✗✗ 25 kHzContinued >>
T6T VHF 50 W Transmitter Page 31 OperationBack to TransmitterMain PageSet microphone type(active or passive)(AM-Voice only)✔✔✗ ✗ ✗✗ PassiveSet keying priority(local or remote) ✔✔✗ ✗ ✗✗ Local-RemoteEnable or disable local PTT ✔✔✗ ✗ ✗✗ EnabledEnable or disable remote PTT ✔✔ ✗ ✗ ✗✗ EnabledEnable or disable remote phantom PTT✔✔✗ ✗ ✗✗ EnabledRadio Settings (Digital Modes):MAC TM1 (inter access delay) ✗✔✗ ✗ ✗✔ 2.5 msMAC TM2 (channel busy) ✗✔✗ ✗ ✗✔ 60 sMAC p (persistance) ✗✔✗ ✗ ✗✔ 13/256MAC M1 (maximum number of access attempts)✗✔✗ ✗ ✗✔135Scramble vector ✗✔✗ ✗ ✗✔ 4D4B19787Tx enable ✗✔✗ ✗ ✗✔ OnPolarities:Ready out ✔✔Viewstate ✗✗✗ STDSet PTT input polarity(AM modes only)✔✔Viewstate ✗✗✗ STDSet phantom PTT input polarity(AM modes only)✔✔Viewstate ✗✗✗ STDContinued >>Table 9 Functions and Parameters (Continued)Function Front Panel VFP MARC T6 Controller T1/E1 HDLC Default Setting
T6T VHF 50 W Transmitter Page 32 OperationBack to TransmitterMain PageSet PTT reference voltage(AM modes only)✔✔Viewstate ✗✗✗ +14 VSet PTT output polarity(AM modes only)✔✔Viewstate ✗✗✗ STDSet fast PTT antenna changeover output polarity(AM modes only)✔✔Viewstate ✗✗✗ STDSet antenna changeover output polarity(AM modes only)✔✔Viewstate ✗✗✗ STDSet external VSWR input polarity(All modes)✔✔Viewstate ✗✗✗ STDSet inhibit input polarity(AM modes only)✔✔Viewstate ✗✗✗ STDBIT interruptive test input polarity(AM modes only)✔✔Viewstate ✗✗✗ STD (active low)E-bit input polarity(All modes) ✔✔Viewstate ✗✗✗ STD (active low)Band Edges:Set band edges ✔✔✗ ✗ ✗✗118.000 and 136.975 MHzor112.000 and 155.975 MHzReference Frequency:Adjust transmitter’s reference frequency ✔✔✗ ✗ ✗✗ -LCD Backlight:Adjust LCD backlight ✔✔✗ ✗ ✗✗ 30 sContinued >>Table 9 Functions and Parameters (Continued)Function Front Panel VFP MARC T6 Controller T1/E1 HDLC Default Setting
T6T VHF 50 W Transmitter Page 33 OperationBack to TransmitterMain PageEnd of DocumentBITInitiate BIT interruptive test ✔✔✔ ✔ ✗✗ -STANDBYEnter and exit standby facility ✔✔✔ ✔ ✗✗ Not in StandbySOFTWARE CONFIGURATIONView the transmitter’s software configuration✔✔✗ ✗ ✔✔ -LOCK FACILITIESFront panel lock ✗✔✗ ✗ ✗✗ OffMARC lock ✗✔✗ ✗ ✗✗ OffT1/E1 lock ✗✔✗ ✗ ✗✗ OffHDLC lock ✗✔✗ ✗ ✗✗ OffTable 9 Functions and Parameters (Continued)Function Front Panel VFP MARC T6 Controller T1/E1 HDLC Default Setting
Back to TransmitterMain PageInstallation
T6T VHF 50 W Transmitter Page 2 InstallationBack to TransmitterMain PageWarnings and CautionsThe instructions given in this section involve connecting dangerous voltages to thetransmitter. The instructions detailed in this document must be carried out only by suitablyqualified personnel.The equipment is permanently connected to the mains supply when the mains connector isattached. Switching the rear panel Power switch to off does not isolate all internal circuitsfrom the mains supply. For this reason, a mains isolating switch should be fitted close to,and easily accessible from, the transmitter's position. The isolation switch should isolateboth live and neutral supplies, be clearly labelled, and adequately rated to protect theequipment.The antenna used with the transmitter must be installed such that the resultant radiated fieldstrength is below 10 W/m² in areas normally accessible to personnel.The T6T transmitter's circuitry contains Electrostatic Sensitive Devices (ESSDs). Personnelmust be aware of the precautions necessary to prevent damage to such devices. Duringinstallation all precautions necessary to prevent ESSD damage must be taken.Changes or modifications made to this equipment that are not expressly approved byPark Air, or parties authorized by Park Air, could void the user’s authority to operate theequipment.WARNING Dangerous VoltagesWARNING Dangerous VoltagesWARNING Antenna RadiationCaution ESSDsCaution Unauthorized Modifications
T6T VHF 50 W Transmitter Page 3 InstallationBack to TransmitterMain PageIntroductionThe procedures necessary to install a transmitter are listed in Table 1.Fuses and ConnectorsThe following list details the radio’s supply fuses and connectors. Some of the connectors (depending onyour particular configuration) are required during installation.Table 1 Installation ProceduresProcedure Reference1 Read and understand the warnings and cautions given on page 2.2 Perform an initial inspection of the transmitter and fit the correct ac input fuse. page 93 Fit the transmitter into an equipment cabinet. page 94 Make external signal connections. See Fig 1 to Fig 5 to determine which external connections are required for the particular configuration.page 105 Connect the chassis stud to the cabinet or system earth. page 226 Connect the antenna. page 227 Connect the dc input supply (if required). page 228 Connect the ac input supply (if required). page 23Table 2 Fuses and ConnectorsComponent Type Park Air Part NumberFuses:AC input fuse, F2, for 110/120 V inputAC input fuse, F2, for 220/230 V inputT4A, 125V, ULT4A, 250V, IEC29C11120102S29E01120108SDC input fuse 15A size 0 29-01350201Connectors:AC supply connector IEC 20-02030102DC supply connector XLR3 socket 20-01030106Antenna connector N-type plug 19-01030301MARC connector 9-way D-type plug Plug: 20-01090100Cover: 20-09090101MARC audio RJ48 plug 20K01080100MARC data RJ48 plug 20K01080100Facilities connector 15-way D-type plug Plug: 20-01150100Cover: 20-09150101HDLC connector RJ48 plug 20K01080100T1/E1 connector RJ48 plug 20K01080100Reference connector SMB connector 19C01050300Microphone/Diagnostics connector 7-pin DIN plug 20-01070101
T6T VHF 50 W Transmitter Page 4 InstallationBack to TransmitterMain PageConfigurationConnection of external equipment depends on the configuration required. Possible configurations are:❑T6T transmitter configured for local operation (see Fig 1).❑T6T transmitter configured for remote operation (see Fig 2).❑T6T transmitter configured for use with MARC (see Fig 3).❑T6T Mode 2 configuration (see Fig 4).❑T6T Mode 3 configuration. (see Fig 5).Fig 1 T6T Transmitter Configured for Local OperationFor local operation, the transmitter is operated from the front panel using a microphone/headset.Any of the optional facilities may be connected.AntennaConnectorReferenceConnector Microphone/DiagnosticsConnectorFrequency Counterrequired only formaintenanceFacilitiesConnectorT6T TransmitterE-BIT inputPTT relay outputExternal VSWR inputUnregulated supply outputInhibit inputBIT interruptive test inputAntenna changeover outputReady outputTape outputOptional Facilities thatcan be used if requiredLaptop (or PC) requiredonly for maintenanceMic/Headset forlocal operation
T6T VHF 50 W Transmitter Page 5 InstallationBack to TransmitterMain PageFig 2 T6T Transmitter Configured for Remote OperationAntennaConnectorMicrophone/DiagnosticsConnectorMARC Connectoror,MARC Data and MARC AudioConnectorsMic/Headset forengineering useLaptop (or PC) requiredonly for maintenanceT6T TransmitterAudioRS422 DataPTTUnregulated supplyOptional Facilities thatcan be used if requiredE-BIT inputPTT relay outputExternal VSWR inputUnregulated supply outputInhibit inputBIT interruptive test inputAntenna changeover outputReady outputTape outputReferenceConnectorFrequency Counterrequired only formaintenanceFacilitiesConnectorFor remote operation, Audio and PTT signals from the control equipment terminate on the MARCconnector, or alternatively on the MARC Audio connector. If data is required by a compatible data system,the RS422 data lines terminate on the MARC connector, or alternatively on the MARC Data connector.Any of the optional facilities may be connected.
T6T VHF 50 W Transmitter Page 6 InstallationBack to TransmitterMain PageFig 3 T6T Transmitter Configured for use with MARCAntennaConnectorReferenceConnector Microphone/DiagnosticsConnectorT6T TransmitterEquipmentConnectorRSE2MARCConnectorAudioPTTRS422 dataUnregulated supplyE-BIT inputPTT relay outputExternal VSWR inputUnregulated supply outputInhibit inputBIT interruptive test inputAntenna changeover outputReady outputTape outputFacilitiesConnectorFrequency Counterrequired only formaintenanceMic/Headset forengineering useLaptop (or PC) requiredonly for maintenanceOptional Facilities thatcan be used if requiredWhen using a T6T transmitter with a MARC Remote Site Equipment (RSE2) the transmitter MARCconnector is pin-to-pin wired to one of the RSE2 Equipment connectors.Any of the optional facilities may be connected.
T6T VHF 50 W Transmitter Page 7 InstallationBack to TransmitterMain PageFig 4 T6T Transmitter Mode 2 ConfigurationAntennaConnectorT6R ReceiverAntennaConnectorT6T TransmitterHDLCConnector T1/E1Connector FacilitiesConnectorReferenceConnectorMicrophone/DiagnosticsConnectorReferenceConnectorHeadset/DiagnosticsConnectorT1/E1ConnectorFast AntennaChange-OverSwitchAntenna c/o controlMode 2Network ComputerLaptop (or PC) requiredonly for maintenanceConnects to theMicrophone/DiagnosticsconnectorFrequency Counterrequired only formaintenanceConnects to theReference connectorControl and dataControl anddata. 2 kmmaximumdistance
T6T VHF 50 W Transmitter Page 8 InstallationBack to TransmitterMain PageFig 5 T6T Transmitter Mode 3 ConfigurationAntennaConnectorT6T TransmitterT1/E1Connector ReferenceConnector Microphone/DiagnosticsConnectorMode 3Network Computer Control and dataFrequency Counterrequired only formaintenanceLaptop (or PC) requiredonly for maintenance
T6T VHF 50 W Transmitter Page 9 InstallationBack to TransmitterMain PageInstallation ProceduresInitial Inspection of the TransmitterOn receipt of the transmitter, remove all transit packaging and check that there is no damage. If damageis evident, contact Park Air immediately and retain the original transit packaging. One copy of the T6 UserGuide CD (part number 31-36T62VCD) is normally supplied with the transmitter. This CD includes theVFP software.Fitting the Correct AC Input FuseThe mains input fuse F2 is an integral part of the rear panel ac connector. The fuse type must be correctfor the local mains supply as detailed below.Fitting a Radio into an Equipment CabinetIt is essential that the chosen mechanical installation provides adequate support along thedepth (front to rear) of the unit. The transmitter must not be supported by the front panel;doing so can cause damage.The transmitter can be installed on telescopic slides, or on fixed runners, within a standard 483 mm(19 inch) equipment cabinet. M4 tapped holes, each 10 mm deep (see Fig 6) are provided on each sideof the equipment to accept the slides. Details of suitable telescopic slides and fixed runners are availablefrom Park Air.When fitted in the cabinet, the transmitter's front panel must be secured to the cabinet’s chassis usingfour M6 x 16 mm screws and plastic washers.FS2Spare FuseLineNeutralEarthFor a mains input in the range 110 to 120 Vac, fuseF2 should be rated T4A, 125V, UL.For a mains input in the range 110 to 240 Vac, fuseF2 should be rated T4A, 250V, IEC.Holder for sparefuse (not supplied)Caution Mechanical Support
T6T VHF 50 W Transmitter Page 10 InstallationBack to TransmitterMain PageFig 6 Slide FittingsMake External Signal ConnectionsMaking the external signal connections involves configuring the transmitter to suit its operational mode.Illustrations showing various configurations are shown in Fig 1 to Fig 5; these figures should be used onlyas a guide.Front Panel ConnectorsThe front panel has two connectors; Microphone/Diagnostics and Reference connectors. These areillustrated in Fig 7.Fig 7 Front PanelFrontPanel399390.9378.2232.2207.5152.847.029.041.743088.9450All measurements in mm
T6T VHF 50 W Transmitter Page 11 InstallationBack to TransmitterMain PageMicrophone/Diagnostics ConnectorThe Microphone/Diagnostics connector is a self-locking 7-way DIN socket used for connecting amicrophone, microphone/headset or PC. The connector pin-out is detailed in Table 3.Reference ConnectorThe Reference connector is an SMB plug used to monitor the radio’s reference frequency. It monitorsthe frequency at a level of 100 mV (±50 mV) with less than -10 dBc harmonics.Table 3 Microphone/Diagnostics ConnectorPin Number Signal Characteristic Usage1 Microphone ground 0 V Microphone/Headset2 Transmit data RS232. 115200 baud, 8 data bits, 1 stop bit, no parity, no handshaking. PC3 Microphone PTT 0 V to PTT. Microphone/Headset4 Receive data RS232. 115200 baud, 8 data bits, 1 stop bit, no parity, no handshaking. PC5 Sidetone – Microphone/Headset6 Microphone input To ensure correct VOGAD operation, the fol-lowing microphone input levels are required:Passive setting: between 2 and 35 mVActive setting: between 8 and 140 mV.Microphone/Headset7 Ground 0 V PCPin-out of the Microphone/Diagnostics connector looking intothe mating face of the chassis mounted socket.A suitable free socket is detailed in Table 2 on page 3.
T6T VHF 50 W Transmitter Page 12 InstallationBack to TransmitterMain PageRear Panel ConnectorsThe rear panel connectors are shown in Fig 8 and listed in Table 4. Select which connectors are goingto be used and then make connections as required.Fig 8 Rear Panel (Connectors)Table 4 Rear Panel Connector UsageConnector Type UsageAC Supply IEC Terminating the ac input supply.DC Supply XLR 3-pin Terminating the dc input supply.Antenna N-type Terminating the antenna feeder coaxial cable.External Speaker 3.5 mm stereo jack Connects an external loudspeaker for monitoring sidetone.MARC 9-way D-type Used to connect to a MARC remote site equipment.Used to connect a T6 controller or hub.Used to terminate remote audio and PTT signals when a remote site equipment or T6 controller is not used.MARC Audio RJ48 Used as an alternative to the MARC connector for terminating remote audio and PTT signals.MARC Data RJ48 Used as an alternative to the MARC connector for terminating data signals to and from a compatible data system.Facilities 15-way D-type Provides a number of optional facilities that can be used as required.T1/E1 RJ48 Used for connecting the radio to a Mode 3 network computer, connecting a transmitter and receiver together as a Mode 2 base station, or for connecting to a digital voice and data net-work.HLDC RJ48 Used to connect to a Mode 2 network computer.ANTENNADANGER HIGHRF VOLTAGESCONNECTANTENNABEFOREUSET1/E1 HDLC MARCDATA MARCAUDIO MARC FACILITIES21. 6 - 32 V 10 APOWER 400VA max~ 110 - 240V ( +10%) 4ASEE INSTALLATION INSTRUCTIONS BEFORECONNECTING SUPPLIESDISCONNECT SUPPLIES WHEN NOT IN USEDC SUPPLYAC SUP PL Y48 - 62HzFUSE F1F15A 32V110V - 120V T4A 125V UL110-240V T4A 250V IECRATINGSFUSE F2DC SUPPLYFUSE F2FUSE F1SUPPLYAC SUPPLY
T6T VHF 50 W Transmitter Page 13 InstallationBack to TransmitterMain PageMARC ConnectorThe MARC connector is a 9-way D-type socket used to connect the transmitter to a MARC remote siteequipment, or it can also be used for normal remote operation.As an alternative to using this connector, the RJ48 style MARC Audio and MARC Data connectors canbe used to provide the same functions.The MARC connector pin-out is shown below and detailed in Table 5.Note ...The line level figures shown for the MARC connector are the limits when testing the transmitter usinga sine wave; the line level will be 10 dB above the line level setting. See the information suppliedunder the heading ‘Line Level Settings’ in Operation.Table 5 MARC ConnectorPin Number Signal Characteristic1 Ground 0 V23Audio line in (+)Audio line in (-)Balanced 600 ohm, -20 to +20 dBm.Phantom keying can be superimposed on the audio lines. See Fig 10.4 PTT input Remote PTT signal input. See Fig 9.5 Output supply This output is between 21.6 and 32 Vdc (nominally 28 V) fused at 500 mA. 67Data in (+) Data In (-)RS422 differential asynchronous data at 9600 baud, 8 data bits, 1 stop bit, no parity, no handshaking.89Data Out (+)Data Out (-)RS422 differential asynchronous data at 9600 baud, 8 data bits, 1 stop bit, no parity, no handshaking.Pin-out of MARC connector looking into the mating face of thechassis mounted socket.A suitable free socket is detailed in Table 2 on page 3.1569
T6T VHF 50 W Transmitter Page 14 InstallationBack to TransmitterMain PageMARC Audio ConnectorThe MARC Audio connector is an 8-way RJ48 socket. It can be used as an alternative to the MARCconnector for audio and PTT connections. The connector pin-out is shown below and detailed in Table 6.Note ...The line level figures shown for the MARC Audio connector are the limits when testing thetransmitter using a sine wave; the line level will be 10 dB above the line level setting. See theinformation supplied under the heading ‘Line Level Settings’ in Operation.Table 6 MARC Audio ConnectorPin Number Signal Characteristic12Audio line in -(input)Audio line in +(input)Balanced 600 ohm, -20 to +20 dBm.Phantom keying can be superimposed on the audio lines. See Fig 10.3 Fast antenna changeover/PTT(output)Open collector NPN transistor grounding output, 200 mA max, configurable n/o or n/c).4 Not used -5 Not used -6 PTT (input) Remote PTT signal input. See Fig 9.7 Ground 0 V.8 Not used -Pin 1RJ48 PlugNumbering is shown looking from the top of the connector.The top is being viewed when the lever is on the bottom.
T6T VHF 50 W Transmitter Page 15 InstallationBack to TransmitterMain PageFig 9 Remote KeyingFig 10 Phantom KeyingT6T TransmitterMARC Audio Connectoraudio is pins 1 and 2Audio line 1Audio line 2PTT Reference Voltage (0 V, +14 V or -14 V)Set from front panelPTTSwitchVPTTThe transmitter reference voltage (0 V, +14 V or -14 V) is selected from the Polarities screen.❑PTT is active when VPTT differs from the transmitter reference voltage by more than ±10 V.❑PTT is inactive when VPTT differs from the transmitter reference voltage by less than ±1 V.❑Maximum value of VPTT is ±60 V with respect to transmitter reference voltage.Example:To use 0 V as the keying potential, VPTT = 0 V; set transmitter reference voltage to +14 V; set PTT In to STD.Cross-Site LinesAudioCircuitPTT input requires at least 1 mA to operate.Input will draw no more than 6 mA.PTT is pin 6MARC Connectoraudio is pins 2 and 3PTT is pin 4MARC orMARC AudioConnectorControlEquipment ground is pin 7.ground is pin 1.T6T TransmitterPTTSwitchReference Voltage (0 V, +14 V or -14 V)Set from front panelVPTTTo reduce the number of cross-site lines between the control site and the transmitter, phantom keying may be employed.This method has the keying potential (VPTT) superimposed on the audio lines instead of using a separate line.The transmitter reference voltage (0 V, +14 V or -14 V) is selected from the Polarities screen.❑PTT is active when VPTT differs from the transmitter reference voltage by more than ±10 V.❑PTT is inactive when VPTT differs from the transmitter reference voltage by less than ±1 V.❑Maximum value of VPTT is ±60 V with respect to transmitter reference voltage.Example:To use 0 V as the keying potential, VPTT = 0 V; set transmitter reference voltage to +14 V; set PTT In to STD.Audio lines with phantom keyingsignal superimposedPTT input requires at least 1 mA to operate.Input will draw no more than 6 mA.MARC Audio Connector:Audio is pins 1 and 2MARC Connector:Audio is pins 2 and 3MARC orMARC AudioConnectorAudioCircuitControlEquipment
T6T VHF 50 W Transmitter Page 16 InstallationBack to TransmitterMain PageMARC Data ConnectorThe MARC Data connector is an 8-way RJ48 socket. It can be used as an alternative to the MARCconnector for data connections. The connector pin-out is shown below and detailed in Table 7.Table 7 MARC RJ48 Data ConnectorPin Number Signal Characteristic12Data in (-)Data in (+)RS422 differential asynchronous data, 9600 baud, 8 data bits, 1 stop bit, no parity, no handshaking.3 Not connected -45Data out (+)Data out (-)RS422 differential asynchronous data, 9600 baud, 8 data bits, 1 stop bit, no parity, no handshaking.6 Remote Supply ON/OFF 0 V to switch off.Note: Rear panel switch must be in ON position for this function to operate.7 Ground 0 V.8 Output supply This output is between 21.6 and 32 Vdc (nominally 28 V) fused at 500 mA.Pin 1RJ48 PlugNumbering is shown looking from the top of the connector.The top is being viewed when the lever is on the bottom.
T6T VHF 50 W Transmitter Page 17 InstallationBack to TransmitterMain PageT1/E1 ConnectorThe T1/E1 connector is an 8-way RJ48 socket used for connecting to a Mode 3 network computer orconnecting a transmitter and receiver together when operating as a Mode 2 base station. The connectorpin-out is detailed in Table 8. Table 8 T1/E1 ConnectorPin Signal Characteristic1 RRing T1 - Balanced 100 ohm (±10%), 1.544 Mbits per second (±50 ppm), AMI/B8ZS Coding.E1 - Balanced 120 ohm (±10%), 2.048 Mbits per second (±50 ppm), AMI/HDB3 Coding.Protected with 28 V differential and common mode clamp and 1.25 A fuse in each line.2RTip3 Not connected -4 TRing T1 - Balanced 100 ohm (±10%), 1.544 Mbits per second (±50 ppm), AMI/B8ZS Coding.E1 - Balanced 120 ohm (±10%), 2.048 Mbits per second (±50 ppm), AMI/HDB3 Coding.Protected with 28 V differential and common mode clamp and 1.25 A fuse in each line.5TTip6 Not connected -7 Not connected -8 Not connected -Pin 1RJ48 PlugNumbering is shown looking from the top of the connector.The top is being viewed when the lever is on the bottom.
T6T VHF 50 W Transmitter Page 18 InstallationBack to TransmitterMain PageHDLC ConnectorThe HDLC connector is an 8-way RJ48 socket used for connecting to a Mode 2 network computer. Theconnector pin-out is detailed in Table 9..Table 9 HDLC ConnectorPin Signal Characteristic1 HDLC RX A(input) RS422 differential synchronous data, 128 kbytes per second (±50 ppm).2 HDLC RX B(input)3 HDLC CL A(output)RS422 differential synchronous data, 128 kbytes per second (±50 ppm).4 HDLC TX B(output) RS422 differential synchronous data, 128 kbytes per second(±50 ppm).5 HDLC TX A(output)6 HDLC CL B(output) Pair to pin 3.7 Ground 0 V.8 Output supply This output is between 21.6 and 32 Vdc (nominally 28 V) fused at 500 mA.Pin 1RJ48 PlugNumbering is shown looking from the top of the connector.The top is being viewed when the lever is on the bottom.
T6T VHF 50 W Transmitter Page 19 InstallationBack to TransmitterMain PageExternal SpeakerThe External Speaker connector is a 3.5 mm stereo jack used for connecting an external speaker to thetransmitter to provide sidetone. This speaker should be a high impedance active type.Table 10 External SpeakerPin Signal CharacteristicTip Speaker Drive (output) 0 to 3 V pk-pk. Connected directly to Ring.Ring Speaker Drive (output) 0 to 3 V pk-pk. Connected directly to Tip.Sleeve Ground 0 V.
T6T VHF 50 W Transmitter Page 20 InstallationBack to TransmitterMain PageFacilities ConnectorThe Facilities connector is a 15-way D-type filtered socket used for connecting to associated parts of asystem. The connector pin-out is detailed in Table 11.Table 11 Facilities ConnectorPin Number Signal Characteristic1 Ground 0 V.2 E-BIT (input) An external BIT input that connects from any ancillary equipment having a compatible BIT alarm output.When this input is active, the transmitter’s front panel Alarm indicator flashes and an E-BIT message is displayed on the display. The input is TTL having a 4.7 kohm pull-up resistor to 5 V. The input is configurable from the front panel to be active high or low.3 PTT output Grounding solid state relay. +60 to -60 V, ac or dc, 100 mA max, configurable n/o or n/c. Activated 35 ms (±1 ms) before the start of the power ramp up to allow for the antenna relay pull-in time.4 External VSWR input Used to indicate an external VSWR fault. TTL input with 4.7 kohm pull-up to 5 V. Configurable active high or low.56Antenna changeover (output)Antenna changeover common (output)Solid state relay linked to pin 6. See Fig 11 for further detail.Solid state relay linked to pin 5.7 Not used -8 Ground 0 V.9 Output supply This output is between 21.6 and 32 Vdc (nominally 28 V) fused at 500 mA.10 Inhibit (Input) Active signal prevents the transmitter keying. TTL with 4.7 kohm pull-up to 5 V. Configurable active high or low.11 BIT interruptive test (input)Active signal initiates a BIT test. TTL with 4.7 kohm pull-up to 5 V. Configurable active high or low. Must be asserted for >300 ms.12 Not used -13 Ready (output) An output that is active when the radio is ready to transmit and no faults are detected. Open collector NPN transistor grounding output, 200 mA max, configurable n/o or n/c.14 Tape (output) An audio output for connection to a recording system. 0 dBm fixed output into 600 ohm for 90% modulation depth.15 Reserved (output) Do not connect to pin 15 unless advised to do so by Park Air.18915Pin-out of Facilities connector looking into the mating face ofthe chassis mounted socket.A suitable free socket is detailed in Table 2 on page 3.
T6T VHF 50 W Transmitter Page 21 InstallationBack to TransmitterMain PageFig 11 Example: Using the Antenna Changeover OutputT6T Transmitter65FacilitiesConnectorAntennaT6T TransmitterFacilitiesConnectorAntenna928 Vdc (nominal)Control(Main)(Standby)AntennaMain/StandbyTransmit RelayExampleThis example shows the Antenna Changeover Output configured to control the antenna switching between mainand standby transmitters. The potential on Facilities connector pin 6 is switched through to pin 5 when the standbytransmitter is keyed; in this example, pin 6 is linked to ground. This energizes the Main/Standby Transmit Relay toroute the standby transmitter to the antenna.Other ConfigurationsThe antenna changeover output can be configured in other ways to suit the user’s requirement subject to:❑Pin 6 can be any potential between -60 and +60 Vac, or dc.❑The maximum current drawn must not exceed 100 mA.❑The output at pin 5 is configurable normally open or normally closed from the Polarities screen.❑The internal solid state switch activates 35 ms before the start of the power ramp to allow for the antennarelay pull-in time.8Solid StateRelayLink
T6T VHF 50 W Transmitter Page 22 InstallationBack to TransmitterMain PageChassis Stud ConnectionA chassis stud is fitted to the transmitter's rear panel. This stud is used to connect theequipment to the equipment cabinet, or to the user's system earth point. The stud must notbe used as the safety earth.In order not to compromise the transmitter’s Electromagnetic Compatibility (EMC) the chassis stud,marked and fitted to the rear panel (see Fig 8) must be connected to the equipment cabinet (if acabinet is being used) or to the user's system earth point. The connection should be made using a singletri-rated, green-and-yellow cable having a cross-sectional area of 2.5 mm2. The cable should have CSAand UL1015 approval, and be connected to the chassis stud through an M6 eyelet (for example, Park Airpart number 20-08010103).Failure to comply with this instruction could result in non-compliance with the European Commission EMC Directive 89/336/EEC.Connect the AntennaThe antenna connector is an N-type socket suitable for connecting a 50 ohm antenna.Connect the DC Input SupplyThe transmitter operates from either an ac, or a dc input supply. When both ac and dc are connected,operation from the ac supply takes priority; automatic change-over to the dc supply occurs if the acsupply fails. On restoration of the ac supply, the equipment reverts to ac operation. A dc input supply connector (see Fig 12) is fitted to the equipment's rear panel. The recommendedminimum rating of the dc supply cable is: 2-core having a cross-sectional area of 1.5 mm2 per core. Thesupply cable should be fitted with an XLR 3-pin socket (Park Air part number 20-01030106).Fig 12 DC ConnectorWARNING Chassis EarthPositive NegativeNot usedPin-out of DC connector lookinginto the mating face of the chassismounted socket.
T6T VHF 50 W Transmitter Page 23 InstallationBack to TransmitterMain PageConnect the AC Input SupplyThe equipment is permanently connected to the mains supply when the mains connector isattached. Switching the rear panel Power switch to off does not isolate all internal circuitsfrom the mains supply. For this reason, a mains isolating switch should be fitted close to,and easily accessible from, the transmitter's position. The isolation switch should isolateboth live and neutral supplies, be clearly labelled, and adequately rated to protect theequipment.This equipment must be earthed. The earth terminal of the ac connector should be used asthe safety earth.An ac input connector is fitted to the equipment’s rear panel. The cable used to connect between theequipment and the user’s ac power source should be 3-core (to IEC 227) rated 250 Vac at 8 amps, andhave a minimum cross-sectional area of 1.0 mm2 per core. Park Air recommends the use of polyvinylchloride (PVC) insulated cable. The cable must be fitted with the IEC approved equipment connector andconform to the following specification:❑If PVC insulated, be not lighter than ordinary polyvinyl chloride sheathed flexible cord accordingto IEC publication 227 (designation H05 VV-F, or H05 VVH2-F).❑If rubber insulated, be of synthetic rubber and not lighter than ordinary tough rubber-sheathedflexible cord according to IEC publication 245 titled ‘Rubber Insulated Cables of Rated Voltagesup to and Including 450/750 V (designation H05 RR-F)’.The T6T transmitter is a Class 1 equipment. The ac supply cable should have a green-and-yellowprotective earthing conductor electrically connected to the protective earthing terminal of the equipmentconnector and the mains plug. Park Air recommends the ac supply cable is colour coded in accordancewith the electrical appliance (colour code) regulations for the UK. That is:WARNING Dangerous VoltagesWARNING Earth ConnectionFS2Spare FuseLineNeutralEarth❑The core coloured green-and-yellow must beconnected to the terminal in the plug that ismarked with the letter E or by the earth symbolor coloured green-and-yellow.❑The core coloured blue must be connected tothe terminal that is marked with the letter N orcoloured black.❑The core coloured brown must be connected tothe terminal that is marked with the letter L orcoloured red.Holder for sparefuse (not supplied)
T6T VHF 50 W Transmitter Page 24 InstallationBack to TransmitterMain PageSwitching OnWhen the POWER SWITCH is set to the Standby position, dangerous voltages are stillpresent in the transmitter's internal power supply circuitry. To ensure safe working, thetransmitter must be isolated from the ac and dc input suppliesWhen installation is complete, the transmitter should be switched on at the rear panel 2-way rockerPower switch. The Power switch is used to switch on, and switch off, power to the transmitter's circuitrybut does not remove power from the radio.Under normal circumstances this screen is displayed for a few seconds when the radio is switched on.The bottom row begins empty and dots are added as the initialisation progresses. When the initialisationis complete the Main Screen is displayed.Setting UpWhen installation has been successfully completed the transmitter must be set up using the front panelconntrols or the VFP.Setting up is detailed in the Operation section of this documentation.T 6 D i g i t a l R a d i o( c ) 2 0 0 3 P a r k A i rI n i t i a l i s i n g . . . ................WARNING Dangerous Voltages= Standby= OnWhen setting up the transmitter, pay particular attention to the Polarities of anyfunctions that have been hard-wired during installation. For example, the polarity ofthe PTT input and the polarity and configuration of the Antenna Changeover output.Failure to select the correct settings will result in incorrect operation.
Back to TransmitterMain PageMaintenance
T6T 50 W VHF Transmitter Page 2 MaintenanceBack to TransmitterMain PageIntroductionThis section gives the scheduled and unscheduled maintenance procedures for the T6T transmitter andshows how to use the Virtual Front Panel (VFP).Scheduled Maintenance A scheduled maintenance procedure is given on page 3. Park Air recommends that this task be completed every twelve months.Unscheduled Maintenance Normally, the T6 transmitter is considered a Line Replaceable Unit (LRU) and should be replaced with a serviceable spare if a fault occurs. The faulty transmitter should then be returned to Park Air for repair.In certain circumstances, Park Air Customer Support may suggest that the user change one of the transmitter modules. Dismantling and assembly instructions are therefore given under the heading Unscheduled Maintenance starting on page 7.Using the VFP Operating parameters can be set from the transmitter front panel, or by using the VFP. Some additional functions are available from the VFP. See page 18.
T6T 50 W VHF Transmitter Page 3 MaintenanceBack to TransmitterMain PageScheduled MaintenancePark Air recommends that scheduled maintenance is carried out at twelve-monthly intervals. Scheduledmaintenance comprises the following checks:Cleaning and Checking Security of ConnectorsRemove all dust and dirt from the equipment's exterior using a lint free cloth and camel hair brush. Checkall external connections are secure and free from damage.Setting the Transmitter’s Internal Reference FrequencyTo set the transmitter’s internal reference frequency, use the following procedure. Note that referencesto the switch in the procedure mean the Scroll/Select switch.(6) Turn the switch clockwise until Exit is highlighted, then press the switch. You are returned to theMain screen. (7) Disconnect the frequency counter.Number Check Tools/Test Equipment Required1 Ensure the equipment is clean and that external connectors are securely fitted. Camel hair brush/clean lint-free cloths2 Check and reset (if required) the transmitter's frequency standard. VHF Frequency Counter3 Perform a BIT interruptive test.4 Perform an ac and dc change-over check (if both supplies are connected).Control ScreenSettings ScreenFr equencyChannelS e t t i n g sE x i tB a n d E d g e sR e f F r e q 5 0 . 0 %B a c k l i g h t 0 3 0 sE x i t < < > >(1) Ensure the transmitter does not havean offset(2) Connect a frequency counter to thefront panel Reference connector.(3) From the Main screen, press the switchto display the Control screen. Turn theswitch until Settings is highlighted.Press the switch.(4) Ensure the Settings screen isdisplayed. Turn the switch until RefFreq is highlighted, then press theswitch.(5) With Ref Freq selected turn the switchclockwise or anti-clockwise until thefrequency counter reads 20.950000MHz ±10 Hz, then press the switch.
T6T 50 W VHF Transmitter Page 4 MaintenanceBack to TransmitterMain Page(8) If not 5-carrier offset, refer to AM Voice Mode Settings Screen in the Operation section of thisdocument and set to the required offset. (9) If 5-carrier offset is required, restore the carrier offset using the following routine:❑Connect a 50 ohm frequency counter, through a 60 dB attenuator, to the transmitter’s rearpanel Antenna connector (see Fig 1 for location of the Antenna connector).❑Refer to AM Voice Mode Settings Screen in the Operation section of this document and setthe desired 5-carrier offset.❑Refer to Changing the Transmitter’s Operating Frequency in this document and set thetransmitter to the nearest 25 kHz channel frequency. For example, if the required frequencyis 124.504 (+4 kHz offset), set the transmitter to 124.500 MHz.❑Key the transmitter and adjust the reference frequency, using the front panel Scroll/Selectcontrol, until the frequency counter displays the required operating frequency. For example124.504 MHz.❑When the frequency counter displays the exact operating frequency, press the Scroll/Selectcontrol and stop keying the transmitter.❑Disconnect the test equipment and reconnect the antenna.
T6T 50 W VHF Transmitter Page 5 MaintenanceBack to TransmitterMain PageTo Initiate a BIT TestAn interruptive BIT test cannot be initiated in Mode 2 or Mode 3.(1) From the Main screen, press the switch todisplay the Control screen. Turn the switchuntil BIT is highlighted. Press the switch.(2) Ensure the BIT menu is displayed. Turnthe switch until BIT Initiate is highlighted.Press the switch.(3) During the test, which takes approximatelytwo seconds, the Testing screen isdisplayed.(4) After the test, either a Pass or Fail screenis displayed. Selecting OK takes the userback to the BIT screen.(5) If fail is displayed, scroll through the screento check the cause of the failure.During an interruptive BIT test, the transmitter radiates modulated carrier waves at the set power.Users should therefore obtain the necessary authority before initiating a test.If the test is to be carried out with the antenna disconnected, ensure a load is fitted to thetransmitter's Antenna connector.In order to test the line input stages, an internally generated 1 kHz tone is injected into the line inputcircuit. Any other audio present on the line input will cause the test to be inaccurate. Therefore thetransmitter MUST NOT be keyed during the test.B I TS / W C o n f i gSt andbyE x i t < <B I T I n i t i a t eE T I 0 0 0 0 0 : 0 0 h r sA C S u p p l y O NE x i t > >T e s t i n gP l e a s e W a i tT e s t S t a t u sP A S SO KT e s t S t a t u sF A I LO K
T6T 50 W VHF Transmitter Page 6 MaintenanceBack to TransmitterMain PageAC and DC Change-over CheckIf both ac and dc input supplies are connected to the transmitter, carry out the following check:(1) Confirm that both ac and dc supplies are connected to the transmitter. Ensure that the rear panelPower switch is set to the I (on) position.(2) Confirm that the front panel Ready indicator is lit, the LCD is illuminated, and the transmitter isoperational.(3) Switch off the ac supply from its source.(4) Check that the transmitter continues to operate correctly from the dc supply. If accessed, thefront panel BIT screen will show AC Supply as off, and DC supply as on. The value of the dcsupply is also shown.
T6T 50 W VHF Transmitter Page 7 MaintenanceBack to TransmitterMain PageUnscheduled MaintenanceThe instructions given in this document involve connecting dangerous voltages to thetransmitter. Maintenance should be carried out only by suitably qualified personnel.When an ac supply is connected, dangerous voltages are present within the transmitter. Caremust be taken by personnel to avoid accidental contact with exposed circuitry duringmaintenance or alignment procedures.When the power switch is set to the Standby position, dangerous voltages are still presentin the transmitter's internal power supply circuitry. To ensure safe working, the ac and dcinput supplies must be disconnected from the transmitter.The antenna used with the transmitter must be installed such that the resultant radiated fieldstrength is below 10 W/m² in areas normally accessible to personnel.The T6 transmitter's circuitry contains Electrostatic Sensitive Devices (ESSDs). Personnelmust be aware of the precautions necessary to prevent damage to such devices. Changes or modifications made to this equipment that are not expressly approved byPark Air, or parties authorized by Park Air, could void the user’s authority to operate theequipment.When carrying out repairs to the PA module, care must be taken not to damage the gasket.If the strips become damaged, they must be replaced. Failure to comply with this instructionmay compromise the transmitter’s Electromagnetic Compatibility (EMC) and breachEuropean Commission regulations.When screws are inserted into the transmitter PA casting care must be taken not to exceeda torque of 6 Ibs/inch when tightening. This applies when replacing the top and bottomcovers and during the refitting of the PA module. WARNING Dangerous VoltagesWARNING Antenna RadiationCaution ESSDsCaution Unauthorized ModificationsCaution Repairs
T6T 50 W VHF Transmitter Page 8 MaintenanceBack to TransmitterMain PageIntroductionThis document provides the user with detailed instructions on the removal and replacement of modulesand assemblies.(1) When removing or refitting modules, observe antistatic handling precautions.(2) Do not change any potentiometer (or link) settings unless detailed in these instructions.Potentiometers have been set using specialist equipment.(3) The transmitter uses the following Molex KK connectors:CN2 on the PA Control moduleCN7 and CN6 on the PSU Regulator module.To remove KK type connectors:❑Free the locking mechanism on the connector by moving one side of the connector up, thenmove the other side up (see the following diagram). The upward motion should only be as faras needed to free the locking mechanism❑DO NOT pull the cable to free the connector❑Note that KK type connectors are designed to be removed in this manner to free the lockingmechanism. Do not use this procedure with non-KK type connectors as damage to theconnector may occur.Tools, Materials and Test Equipment RequiredThe following tools, materials and test equipment should be made available to complete themaintenance tasks described in this section:❑Personal Computer (PC)❑General Purpose Tool kit (including a 1.5 mm Allen key)❑5 mm Nut Spinner❑Camel Hair Brush❑Clean Lint-free Cloths❑Frequency Counter❑Power Meter❑Dummy Load❑PC to Radio Interconnection Lead(Park Air part number 17E12600001)❑SMB to BNC Lead for reference frequency(Park Air part number 17K11000004)Lift 2Lift 1PCB
T6T 50 W VHF Transmitter Page 9 MaintenanceBack to TransmitterMain PageTop CoverTo remove the top cover, locate and unscrew the 18 countersunk screws securing the top cover to themainframe. Access can then be gained to the following modules:❑Processor module❑PSU Regulation module❑Power Supply (requires top cover and bottom cover to be removed)❑RF PA module (requires top cover and bottom cover to be removed)❑Front Panel assembly PCB (requires top cover and bottom cover to be removed)Removing and Refitting the Processor ModuleThe Processor module is located as shown in Fig 3. A module removal diagram is shown in Fig 4. Dangerous voltages are present within the transmitter. Care must be taken by personnel toavoid accidental contact with exposed circuitry when the top cover is removed and power isapplied to the radio.RemovalBefore attempting to remove the Processor module, and if possible, save the radio’s settings. To achievethis connect a PC with the VFP software loaded to the radio using the PC to Radio Interconnection Lead(Park Air part number 17E12600001). With the VFP software active, upload the radio settings to aspecified file.Ensure that the transmitter is isolated from the ac and dc input supplies. Then proceed as follows:(1) Unscrew the 18 countersunk screws and remove the transmitter’s top cover.(2) Locate the Processor module (Fig 3) and disconnect the following connectors (Fig 4):❑CN1 50-way connector (50-way ribbon cable from PA Control module)❑CN3 14-way connector (14-way ribbon cable from PSU Regulator module)❑CN4 34-way connector (34-way ribbon cable from Front Panel module).(3) Gain access to the rear of the transmitter. Using a 5 mm nut spinner tool, remove the fourscrewloc 8 mm-4-40 UNC screws that secure the Processor module interface connectors CN5and CN6 to the rear panel.(4) Remove the seven M3 x 8 mm screws that secure the module to the transmitter’s mainframe.(5) Remove the module from the chassis. RefittingTo refit the Processor module, proceed as follows:(1) Place the module in position. Ensure no wires are trapped by the module. Ensure jumper J2 onthe module is set to ‘T’ for transmitter (see the following diagram).WARNING Dangerous Voltages
T6T 50 W VHF Transmitter Page 10 MaintenanceBack to TransmitterMain Page(1) Ensure the module’s interface connectors CN5 and CN6 are located correctly and are alignedwith the screw holes in the rear panel. Fit the four screwloc 8 mm-4-40 UNC screws and wavywashers but leave them loose.(2) Fit the 11 (Mod Strike 5 modules), 7 (Mod Strike 6 and 7 modules) M3 x 8 mm screws that securethe module to the transmitter’s mainframe, but leave them loose.(3) Using a 5 mm nut spinner, tighten the four screwloc 8 mm-4-40 UNC screws and wavy washersthat secure the connectors; then tighten the 11 (Mod Strike 5 modules), 7 (Mod Strike 6 and 7modules) M3 x 8 mm screws that secure the module to the transmitter’s mainframe. (4) Refit the following connectors to the module:❑CN1 50-way connector (50-way ribbon cable from PA Control module).❑CN3 14-way connector (14-way ribbon cable from PSU Regulator module).❑CN4 34-way connector (34-way ribbon cable from Front Panel module).(5) Re-establish the ac and/or dc supplies (take heed of the warning on page 9).(6) Switch power on at the radio using the rear mounted Power switch.(7) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.(8) If a new module has been fitted, connect the VFP PC to the radio using the PC to RadioInterconnection Lead, Park Air part number 17E12600001 (if not already connected). Note thatany module sent from Park Air as a spare for a particular radio will be programmed withcompatible operating and Fill software. Park Air keeps records of module software in all radiossupplied. Care must be taken when using a module removed from another radio as this modulemay not have compatible software.(9) Download the saved radio settings from file using the VFP. Alternatively, the settings can beedited by hand as described in the Operation section of thisdocument Once entered, ensure the required settings appear in the VFP screen.(10) Carry out the Calibrate routine using the VFP, as detailed in the procedure To Calibrate theTransmitter on page 22.(11) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.(12) Set the transmitter’s internal reference frequency by carrying out the procedure detailed onpage 3.IC25T2 C84TS7T3IC27JP2Shown set fortransmitterTTR/TRR/TRIC21IC20IC19IC38
T6T 50 W VHF Transmitter Page 11 MaintenanceBack to TransmitterMain Page(13) Remove the VFP connector and switch power off at the transmitter using the rear mountedPower switch. Isolate the transmitter from the ac and/or dc supplies.(14) Refit the transmitter’s top cover (take note of repairs caution (1) on page 7 before carrying outthis task). The transmitter can now be returned to service.Removing and Refitting the PSU Regulator ModuleThe PSU Regulator module is located as shown in Fig 3. A module removal diagram is shown in Fig 5.RemovalBefore attempting to remove the PSU Regulator module, ensure that the transmitter is isolated from theac and dc input supplies. Then proceed as follows:(1) Remove the transmitter’s top cover as described on page 9 (take heed of the warning).(2) Locate the PSU Regulator module and remove the three M3 x 8 mm captive washer screws thatsecure the module to the transmitter’s mainframe.(3) Carefully raise the module to gain access to the module connectors.(4) Disconnect the following connectors:❑CN5 10-way connector (10-way ribbon cable to PA Control module)❑CN6 6-way connector (2-way loom to power supply). Note caution (3) on page 8❑CN4 14-way connector (14-way ribbon cable to Processor module)❑CN3 3-way connector (3-wire loom to PA module)❑CN7 3-way connector (3-wire loom to rear panel On/Off switch). Note caution (3) on page 8❑CN2 2-way connector (2-wire loom from dc input connector on rear panel)❑CN1 4-way connector (4-wire cable from power supply)❑CN9 2-way connector (2-wire cable ac input to power supply)❑CN8 3-way connector (2-wire loom to rear panel ac input connector plus chassis connection).(5) Remove the module from the chassis. RefittingTo refit the PSU Regulator module, proceed as follows:(1) While holding the module in position, connect the following connectors:❑CN8 3-way connector (2-wire loom to rear panel ac input connector plus chassis connection)❑CN9 2-way connector (2-wire cable ac input to power supply)❑CN1 4-way connector (4-wire cable from power supply)❑CN2 2-way connector (2-wire loom from dc input connector on rear panel)❑CN7 3-way connector (3-wire loom to rear panel On/Off switch)❑CN3 3-way connector (3-wire loom to PA module)❑CN4 14-way connector (14-way ribbon cable to Processor module)❑CN6 6-way connector (2-way loom to power supply)❑CN5 10-way connector (10-way ribbon cable to PA Control module).(2) Locate the module in position. Ensure no wires are trapped by the module.
T6T 50 W VHF Transmitter Page 12 MaintenanceBack to TransmitterMain Page(3) Secure the module to the transmitter’s mainframe using the three M3 x 8 mm captive washerscrews removed during the removal procedure.(4) Re-establish the ac and/or dc supplies (take heed of the warning on page 7).(5) Switch power on at the radio using the rear mounted Power switch.(6) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.(7) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.(8) Switch power off at the transmitter using the rear mounted Power switch. Isolate the transmitterfrom the ac and/or dc supplies.(9) Refit the transmitter’s top cover. The transmitter can now be returned to service.Bottom CoverTo remove the bottom cover, locate and unscrew the 15 countersunk screws securing the bottom coverto the mainframe. Access can then be gained to the following modules:❑PA Control module❑Power Supply (requires top and bottom covers to be removed)❑PA module (requires top and bottom covers to be removed)❑Front Panel assembly (requires top and bottom covers to be removed).Dangerous voltages are present within the transmitter. Care must be taken by personnel toavoid accidental contact with exposed circuitry when the bottom cover is removed andpower is applied to the radio.Removing and Refitting the PA Control Module The PA Control module is located as shown in Fig 3. A module removal diagram is shown in Fig 6.RemovalBefore attempting to remove the PA Control module, ensure that the transmitter is isolated from the acand dc input supplies. Then proceed as follows:(1) Remove the transmitter’s bottom cover as described above (take heed of the warning).(2) Locate the module and disconnect the following connectors:❑CN1 50-way connector (50-way ribbon cable from Processor module)❑CN6 10-way connector (10-way ribbon cable from PSU Regulator module)❑CN5 SMB connector (reference frequency)❑CN3 SMB connector (RF drive)❑CN4 SMB connector (forward power sense)❑CN2 6-way connector (5-wire loom to PA module).(3) Remove the seven M3 x 8 mm captive washer screws that secure the module to the transmitter’smainframe.(4) Remove the module from the chassis. WARNING Dangerous Voltages
T6T 50 W VHF Transmitter Page 13 MaintenanceBack to TransmitterMain PageRefittingTo refit the PA Control module, proceed as follows:(1) Place the module in position. Ensure no wires are trapped by the module.(2) Fit the seven M3 x 8 captive washer screws that secure the module to the transmitter’smainframe.(3) Refit the following connectors to the module:❑CN2 6-way connector (5-wire loom to PA module)❑CN4 SMB connector (forward power sense)❑CN3 SMB connector (RF drive)❑CN5 SMB connector (reference frequency)❑CN6 10-way connector (10-way ribbon cable from PSU Regulator module)❑CN1 50-way connector (50-way ribbon cable from Processor module).(4) Re-establish the ac and/or dc supplies (take heed of the warning on page 12).(5) Switch power on at the radio using the rear mounted Power switch.(6) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.(7) Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedureTo Calibrate the Transmitter on page 22.(8) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.(9) Set the transmitter’s internal reference frequency by carrying out the procedure detailed onpage 3.(10) Remove the VFP connector and switch power off at the transmitter using the rear mountedPower switch. Isolate the transmitter from the ac and/or dc supplies.(11) Refit the transmitter’s bottom cover. The transmitter can now be returned to service.Removing and Refitting the Power SupplyThe Power Supply is located as shown in Fig 3. A module removal diagram is shown in Fig 7.RemovalBefore attempting to remove the Power Supply, ensure that the transmitter is isolated from the ac anddc input supplies. Then proceed as follows:(1) Remove the transmitter’s top and bottom covers as described on page 9 and page 12 (take heedof the warnings on those pages).(2) Support the radio on its side. (3) Locate the power supply. From the bottom half of the unit remove the four No. 6 x 32 UNCcountersunk screws that secure the power supply to the transmitter’s mainframe. During thisoperation support the power supply from the top half of the unit.(4) Withdraw the power supply from the chassis sufficient to allow access to the power terminalblocks taking care not to damage the ac terminal plastic supply guard. (5) Remove the connector CN4 (power supply to the power regulator).(6) Disconnect the dc wires from the eight connector terminal block.
T6T 50 W VHF Transmitter Page 14 MaintenanceBack to TransmitterMain Page(7) Slide back the terminal block cover and disconnect the ac wires from the three connector terminalblock (marked L N E).(8) Carefully remove the power supply from the transmitter.Refitting(1) With the transmitter on its side hold the power supply near to its securing position in the top halfof the radio.(2) Slide back the terminal block cover and connect the ac wires to the three connector terminalblock (marked L N E); brown to terminal L, blue to terminal N and yellow/green to terminal E.(3) Connect the dc wires to the eight connector terminal block; red to terminal 2 and terminal 3 andblack to terminal 6 and terminal 7.(4) Connect connector CN4.(5) Taking care not to damage the plastic supply guard, lower the power supply into position andsecure from the bottom half of the unit using the four countersunk screws.(6) Re-establish the ac and/or dc supplies.(7) Switch power on at the radio using the rear mounted Power switch.(8) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.(9) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.(10) Switch power off at the transmitter using the rear mounted Power switch. Isolate the transmitterfrom the ac and/or dc supplies.(11) Refit the transmitter’s top and bottom covers. The transmitter can now be returned to service.Removing and Refitting the PA ModuleThe PA module is located as shown in Fig 3. A module removal diagram is shown in Fig 8.RemovalBefore attempting to remove the PA module, ensure that the transmitter is isolated from the ac and dcinput supplies. Then proceed as follows:(1) Remove the transmitter’s top and bottom covers as described on page 9 and page 12 (take heedof the warnings on those pages).(2) Remove CN3 from the PSU Regulator module.(3) With the transmitter upside-down disconnect CN2 from the PA Control module.(4) Disconnect the SMB connectors CN8 and CN10. Note that CN10 is located within the heatsinkfins and should be disconnected using long nosed pliers. Do not attempt to remove the connectorby pulling on the cable.(5) Remove the black equipment handle from the PA side of the radio by unscrewing and removingthe two M5 x 16 mm panhead screws that secures it to the transmitter.(6) Remove the six M3 x 8 mm countersunk screws and two M3 x 8 mm captive screws that securethe PA from the bottom and top of the mainframe as shown in Fig 8. Ensure the PA module iswell supported during this operation.(7) Withdraw the PA module from the mainframe taking care not to snag the wiring looms.
T6T 50 W VHF Transmitter Page 15 MaintenanceBack to TransmitterMain PageRefittingTo refit the PA module, proceed as follows:(1) Place the module in position and butt it up to the mainframe. Ensure no wires are trapped by themodule.(2) Fit the six M3 x 8 countersunk screws and two M3 x 8 mm captive screws that secure the moduleto the transmitter’s mainframe.(3) Fit the black equipment handle to the PA side of the radio using the two M5 x 16 mm panheadscrews.(4) Connect the SMB connectors CN8 and CN10. Note that CN10 is located within the heatsink finsand should be connected using long nosed pliers if unable to use fingers in the enclosed space.(5) With the transmitter upside-down connect CN2 to the PA Control module.(6) Fit CN3 to the PSU Regulator module.(7) Re-establish the ac and/or dc supplies.(8) Switch power on at the radio using the rear mounted Power switch.(9) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.(10) Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedureTo Calibrate the Transmitter on page 22.(11) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.(12) Remove the VFP connector and switch power off at the transmitter using the rear mountedPower switch. Isolate the transmitter from the ac and/or dc supplies.(13) Refit the transmitter’s top and bottom covers. The transmitter can now be returned to service.Removing and Refitting the Front Panel Assembly PCBThe Front Panel assembly is located as shown in Fig 3. An assembly and PCB removal diagram is shownin Fig 9.RemovalBefore attempting to remove the Front Panel assembly PCB, ensure that the transmitter is isolated fromthe ac and dc input supplies. Then proceed as follows:(1) Remove the transmitter’s top and bottom covers as described on page 9 and page 12 (take heedof the warnings on those pages).(2) Disconnect CN4 at the Processor module. Carefully pull the cable through the aperture in themainframe to free it.(3) Disconnect SMB connector CN5 at the PA Control module. (4) Remove the four M3 x 8 mm countersunk screws from the bottom and top of the mainframe boxsection (see Fig 9, Diagram A).(5) Remove the two black equipment handles by unscrewing and removing the four M5 x 16 mmpanhead screws that secure them to the transmitter. The front panel can now be moved forwardand away from the mainframe.(6) At the front panel, release the control knob by unscrewing the Allen head grub screw using a1.5 mm Allen key. Withdraw the control knob from the spindle.
T6T 50 W VHF Transmitter Page 16 MaintenanceBack to TransmitterMain Page(7) Remove the Front Panel PCB from the Front Panel assembly by removing the six M3 x 6 mmpanhead screws and wavy washers (see Fig 9 Diagram B). RefittingTo refit the Front Panel assembly PCB, proceed as follows:(1) Place the PCB in position at the Front Panel assembly. Ensure the spindle of the control knoband microphone/diagnostics connector are correctly located. Secure the PCB to the Front Panelassembly using the six M3 x 6 mm panhead screws and wavy washers (see Fig 9, Diagram B). (2) At the front panel, place the control knob onto the spindle and using a 1.5 mm Allen key, securethe Allen head grub screw.(3) Secure the Front Panel assembly to the top and bottom of the mainframe box section using thefour M3 x 8 mm countersunk screws. Fit the two black equipment handles using the fourM5 x 16 mm panhead screws (see Fig 9, Diagram A).(4) Route the ribbon cable to the Processor module connector CN4 and connect it.(5) Route the SMB connector to CN5 on the PA Control module and connect it.(6) Re-establish the ac and/or dc supplies.(7) Switch power on at the radio using the rear mounted Power switch.(8) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.(9) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.(10) Switch power off at the transmitter using the rear mounted Power switch. Isolate the transmitterfrom the ac and/or dc supplies.(11) Refit the transmitter’s top and bottom covers. The transmitter can now be returned to service.Removing and Refitting the Cooling FanThe cooling fan is at the rear of the PA module as shown in Fig 3. An assembly and removal diagram isshown in Fig 10.RemovalBefore attempting to remove the fan, ensure that the transmitter is isolated from the ac and dc inputsupplies. Then proceed as follows:(1) Disconnect the two-pin connector.(2) Remove fan's finger guard.(3) Using an Allen key, inserted through the holes in the fan exposed with the finger guard removed,remove the three M4 x 12 mm caphead Allen screws that secure the fan to the PA moduleheatsink.(4) Remove the fan from the PA module. RefittingTo refit the cooling fan, proceed as follows:(1) Locate the fan in position and using a suitable Allen key inserted through the holes for the fan'sfinger guard, secure using the three M4 x 12 mm caphead Allen screws.(2) Secure the finger guard to the fan.
T6T 50 W VHF Transmitter Page 17 MaintenanceBack to TransmitterMain Page(3) Connect the 2-pin fan connector to the fan. Ensure the + marked socket mates with the + markedplug on the fan.(4) Re-establish the ac and/or dc supplies.(5) Switch power on at the radio using the rear mounted Power switch.(6) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit. The transmitter cannow be returned to service.
T6T 50 W VHF Transmitter Page 18 MaintenanceBack to TransmitterMain PageVirtual Front Panel (VFP)Virtual Front Panel (VFP) software is supplied on CD-ROM and is compatible with any PC or laptoprunning Windows 2000™ or Windows XP™. The VFP allows changes to a radio’s settings and channelinformation, it displays the current BIT state, displays BIT history, allows security locks to be set, andprovides maintenance facilities.A radio can be set up using the front panel Scroll/Select switch and LCD, or by using the VFP. Using theVFP has several advantages over setting the transmitter from the front panel; these are:❑A profile of the transmitter’s operation settings and channel information can be created, stored ondisk, and then recalled to download into other transmitters.❑A print out of the transmitter’s profile can be made from the VFP.❑Front Panel Lock is available only when using the VFP. As part of the transmitter’s Settings (seetypical screen display shown below), Front Panel Lock can be set to ON. When selected to on, nosettings or frequency information can be changed from the front panel.❑If the transmitter is part of a MARC system or operates in a digital mode, a MARC Lock, HDLCLock and T1E1 Lock are available when using the VFP. When selected to on, no settings orfrequency information can be changed from the MARC equipment screen, or the digital controlequipment.Typical VFP Screen - AM-Voice Profile Shown
T6T 50 W VHF Transmitter Page 19 MaintenanceBack to TransmitterMain PageInstalling the VFP SoftwareThe VFP software is supplied by Park Air on CD-ROM. The software can be run from the Main page orinstalled on your PC via Explorer.To install the software onto your PC:(1) Using explorer, display the contents of the CD-ROM supplied by Park Air. Identify the file namedS0473Vxx.EXE (where xx is the version number).(2) Using the mouse, right click on the file and then select Copy.(3) Display the Windows desktop. Right click anywhere on the desktop and select Paste.(4) Check that the VFP icon is shown on the desktop. Reposition the icon as required. The VFPapplication is now installed on the PC’s desktop.VFP IconVFP FeaturesThe VFP screen is divided into four main windows: Settings, Channels, BIT and Status Information. Fourcolours are used to display text. The colours have the following meanings:❑Black indicates a valid parameter that has been accepted by the radio.❑Red indicates an invalid parameter that has been rejected by the radio, or a BIT failure.❑Green indicates text that has not yet been downloaded to the radio. Text loaded into the VFP froma previously stored file, or any text that is manually amended is green until it is downloaded intothe radio; after being downloaded into the radio the text changes to black, or if it is invalid, to red.❑Blue indicates Help text and is shown in the Status Information window.The Menu BarThe menu bar has four categories: File, Serial Port, Radio and Help. FileHas the sub-categories: Open, Save and Print. These sub-categories allow the user to openpreviously saved profiles, save a new profile, or print a profile.A special sub-category: File > Save > Diagnostics should only be used when advised by Park Air.Serial PortHas the sub-categories: Com 1 and Com 2. Before the VFP can be used, the appropriateCom 1 or Com 2 must be selected to correspond with the PC’s Com Port used for the radio connection.RadioHas the sub-categories: Retrieve, Send, Calibrate and Test.This category allows a radio’s profile to be loaded into the VFP, allows a profile to be downloaded fromthe VFP to a radio, calibrates a radio and initiates a BIT test.HelpProvides detail about the VFP software.Settings WindowThis window lists all attributes that can be adjusted by the user. If any individual attribute is clicked onusing the mouse, help information is displayed in the Status Information window showing the range ofadjustment for that attribute. Click on the value and use the keyboard to amend it; press Enter to confirmthe new value noting that the amended text is green until it is downloaded into the radio.
T6T 50 W VHF Transmitter Page 20 MaintenanceBack to TransmitterMain PageAny invalid parameters are not indicated until the Settings are downloaded to the radio. It is the radio thatrejects invalid parameters, not the VFP.The transmitter’s reference frequency setting is displayed in the window. Adjusting the referencefrequency is a maintenance operation that requires external test equipment to be connected. The valueshown in the Settings window should not be changed; instead, adjustment of the reference frequencyshould be performed using the radio’s front panel controls as detailed on page 3.Channels WindowUp to 100 preset channels can be stored in the radio. These are listed in the Channels window. Anychannel frequency can be amended by clicking on the value to amend it and pressing Enter to confirmthe new value. Note that the amended channel is green until it is downloaded into the radio.Any invalid frequencies are not indicated until the Channels are downloaded to the radio. It is the radiothat rejects invalid frequencies, not the VFP.BIT WindowTwo lists of information are presented. The current BIT status and the BIT history. The BIT history showsthe last 100 entries. Status Information WindowThe Status Information window gives information regarding the type of radio, the software fills, recentVFP actions and Help information.To Change the Transmitter’s Profile or Save a Profile(1) Using a radio to PC serial interconnection lead, Park Air part number 17E12600001, connect theradio’s front panel Microphone/Diagnostics connector to the PC’s Com Port 1 or Com Port 2(note which Com Port is used).(2) Run up the VFP software and check that a blank VFP screen (as shown below) is displayed.
T6T 50 W VHF Transmitter Page 21 MaintenanceBack to TransmitterMain PageBlank VFP Screen(3) At the Menu Bar, click on Serial Port and select either Com 1 or Com 2. The selection mustcorrespond to the port used to connect to the radio.(4) Load the required information from the radio, or from a stored file. The required information canbe radio settings, frequency channels, BIT information, or all of these.To load a previously stored file, selectFile > Open > Allor,File > Open >Settingsor,File > Open > Channelor,File > Open > BITTo load information from the radio, selectRadio > Retrieve > Allor,Radio > Retrieve > Settingsor,Radio > Retrieve > Channelor,Radio > Retrieve > BIT(5) If required, amend any radio Settings or Channel information.(6) Download the radio’s profile as shown on the VFP screen to either the radio, or to a file.To download into the radio, select Radio > Send > Allor,Radio > Send > Settingsor,Radio > Send > ChannelTo download to a file, selectFile > Send > Allor,File > Send > Settingsor,File > Send > Channelor,File > Send > BIT
T6T 50 W VHF Transmitter Page 22 MaintenanceBack to TransmitterMain Page(7) Check that after downloading to a radio, no invalid parameters are returned (such parametersare displayed as red text). If there are invalid parameters, amend them and then repeat thedownload.(8) When there is no further requirement for using the VFP, exit the VFP software and disconnectthe radio from the PC.To Initiate a BIT Test(1) Using a radio to PC serial interconnection lead, Park Air part number 17E12600001, connect theradio’s front panel Microphone/Diagnostics connector to the PC’s Com Port 1 or Com Port 2(note which Com Port is used).(2) Run up the VFP software and check that a blank VFP screen is displayed.(3) At the Menu Bar, click on Serial Port and select either Com 1 or Com 2. The selection mustcorrespond to the port used to connect to the radio.(4) At the Menu Bar select Radio > Test.(5) An interruptive BIT test now takes place. The results are displayed in the BIT window.(6) If there is no further requirement for using the VFP, exit the VFP software and disconnect theradio from the PC.To Calibrate the Transmitter(1) Connect a dummy load via a power meter to the transmitter’s Antenna connector.(2) Remove the transmitter’s bottom cover.(3) Using a radio to PC serial interconnection lead, Park Air part number 17E12600001, connect theradio’s front panel Microphone/Diagnostics connector to the PC’s Com Port 1 or Com Port 2(note which Com Port is used).(4) Run up the VFP software and check that a blank VFP screen is displayed.(5) At the Menu Bar, click on Serial Port and select either Com 1 or Com 2. The selection mustcorrespond to the port used to connect to the radio.(6) At the Menu Bar select Radio > Retrieve > All.(7) At the Menu Bar select Radio > Calibrate. The Confirm screen will then be displayed to remindyou that a dummy load must be connected before proceeding.During an interruptive BIT test, the transmitter radiates modulated carrier waves at the set power.Users should therefore obtain the necessary authority before initiating a test.If the test is to be carried out with the antenna disconnected, ensure a load is fitted to thetransmitter's antenna connector.In order to test the line input stages, an internally generated 1 kHz tone is injected into the line inputcircuit. Any other audio present on the line input will cause the test to be inaccurate. Therefore thetransmitter must not be keyed during the test.
T6T 50 W VHF Transmitter Page 23 MaintenanceBack to TransmitterMain Page(8) With the Confirm screen displayed and dummy load connected, select Yes to continue with thecalibrate routine. The Progress screen will then be displayed.(9) When the PA Control/PA loop has been calibrated the Progress screen disappears and the VFPscreen reappears showing a calibration complete message in the Status Information window. (10) Gain access to the PA Control module and identify RV8 (see component layout diagram onpage 24). From the transmitter’s front panel AM-Voice or AM-MSK Settings screen, select PTTOn.(11) From the Settings pane of the VFP screen, note the RF power setting. Adjust RV8 until the powermeter reads this value. (12) From the transmitter’s front panel AM-Voice or AM-MSK Settings screen select PTT Off, thenremove the power meter and dummy load. This completes the calibration routine.(13) When there is no further requirement for using the VFP, exit the VFP software and disconnectthe radio from the PC.
T6T 50 W VHF Transmitter Page 24 MaintenanceBack to TransmitterMain PageLocation of RV8Location of PA Control Module RV8Figs 1 to 10 followR130R131R125C421R135RV8CN4R455R456C424R348D24R231R382 R243TP10Small Screening CanRV8
Back to TransmitterMain PageFig 1 T6T Front and Rear PanelsANTENNADANGER HIGHRF VOLTAGESCONNECTANTENNABEFOREUSET1/E1 HDLC MARCDATA MARCAUDIO MARC FACILITIES21.6 - 32V 10APOWER 400VA max~ 110 - 240V ( +10%) 4ASEE INSTALLATION INSTRUCTIONS BEFORECONNECTING SUPPLIESDISCONNECT SUPPLIES WHEN NOT IN USEDC SUPPLYAC SUPPLY48 - 62HzFUSE F1F15A 32V110V - 120V T4A 125V UL110-240V T4A 250V IECRATINGSFUSE F2DC SUPPLYFUSE F2FUSE F1SUPPLYAC SUPPLYRear ViewFront ViewSA3597SA3594
Back to TransmitterMain PageFig 2 Wiring and Interconnection DiagramCN2Microphone/DiagnosticsFront P anelCN3 CN1Microphone /Front PanelConnections Name CharacteristicCN2-1 1 Ground - Microphone 0 VCN2-62 Transmit Data RS232CN2-3 3 MIC PTTCN2-4 4 Receive Data RS232CN2-5 5 Sidetone (Headset Drive) 3 Vac pk-pk, 200RCN2-26 Microphone I nputCN2-7 7 Ground 0 VCN4CN5Power Supply RegulationCN212231CN3132CN14dc I nputInput-1 CN2-2 Fused 21.6 to 32 Vdc InputIn pu t-2 CN 2- 1 G round S u ppl y 0 VConnectionsDC Input RegulationName CharacteristicInput-3 n/cDiagnosticsLNEac InputCN1-3CN1-2CN1-1RegulationCN1-3CN1-2CN1-1PSUConnectionsGround SupplyName CharacteristicCN1-40 VCN3 CN4CN7FacilitiesCN5MARCCN650CN6CN5CN1ProcessorPA ControlConnectionsCN2-1Processorn/cChar acteri sticNameIFFront PanelProcessorConnections Name CharacteristicCN4-1CN4-2CN4-3CN4-4CN1-1CN1-2CN1-3CN1-4LED AlarmLED ReadyLED StandbyLED TxLCD RSOpen collector (5mA)CN4-5CN4-6CN4-7CN4-8CN4-9CN4-10CN4-11CN4-12CN4-13CN4-14CN4-16CN4-17CN4-18CN1-20CN1-19CN4-15CN1-25CN4-24CN4-23CN1-22CN1-21CN1-5CN1-24CN1-23CN1-16CN4-19CN4-22CN4-21CN4-20CN1-18CN1-17CN1-6CN1-7CN4-25LCD R/WLCD BacklightTransmit Data+5 V Supply-5 V SupplyGround+15 V SupplyGroundMic PTTLED RX (not used)5 V pull-upTTLTTLTTLTTL0 V-5 VTTLTTL+1 5 VLCD EnableData 3Data 2Data 7Data 6Data 5Data 4RS232+5 V0 V34CN3-14CN3-13CN3-12CN3-11CN3-10CN4-14CN4-13CN4-12CN4-11CN4-10n/cRemote on/offV UnregV Unregdc DetectCN3-9CN3-8CN3-7CN3-6CN3-5CN3-4CN3-3CN3-2CN3-1ConnectionsCN4-6CN4-9CN4-8CN4-7CN4-5CN4-4CN4-3CN4-2CN4-1 Regulationac Detect-15 V SupplyGround+5 V Supply+15 V SupplyProcessorName Characteristic+15 V Supply-15 V Supply+5 V SupplyGround-15 V21.6 to 32 V21.6 to 32 VOpen collector15V on, 0V of f+15 V+5 V+15 V-15 V+5 V0V0VCN6-7CN6-6CN6-10CN6-9CN6-8CN5-10CN5-9CN5-6CN5-7CN5-8-15 V Supplyac Detectdc Detect-15 V SupplyGround-15 V-15 V0VConnectionsCN6-5CN6-4CN6-3CN6-2CN6-1CN5-2CN5-4CN5-3CN5-5RegulationCN5-1Name+5 V Supply+15 V Supply+5 V Supply+15 V SupplyGroundPA ControlCharacteristic+15 V+5 V+5 V0V+15 V**CN6-7 7CN6-8CN6-9 98ProcessorCN6-1CN6-2CN6-3CN6-5CN6-6CN6-4**465312MARC P ortConnectionsData RX A - Data I n - RS422RS422RS422Data TX B - Data Out +Data TX A - Data Out -RS4220 V or +10 V to +60 V orFused 500mA, 21.6 to 32 V+20 dBm to -20 dBm 600RCharacteristicPTT InputData RX B - Data In +Unregulated SupplyLine In +Ground 0 VName+20 dBm to -20 dBm 600R**CN5-4CN5-6CN5-7CN5-57564Grounding output +/- 60V,100mA max.TT L pu ll -up active lowGrounding output +/- 60V ,100mA max.S quelch Defea t (not used)Antenna Change OverExternal VSWRCN5-3CN5-2CN5-1ProcessorConnectionsFacilities231TT L pu ll -up active lowCharacteristicNameE BitPTTGround 0 VGroundUnregulated SupplyCN5-8CN5-9 980 VFused 300mA 21.6 to 32 VGrounding output +/- 60V,100mA max.NameReservedTape OutputCN5-14CN5-15CN5-13CN5-12CN5-111415131211 BIT Interruptive TestRSSI (not used)Ready OutputFacilitiesConnectionsCN5-10Processor10 InhibitOpen collector, 0 V = Ready-10 dBm. 100RTT L pull-up active lowCharacteristic***V UnregReceive Data0 V=PT T,5 V pull-up=PTTTurn +TTLTTLTTLRS232Turn -Sidetone (Headset Drive) 3 Vac pk-pkLoudspeaker Amp DriveGroundMic InputGround 0V1.6V p-p maximum0V2V p- p ma x imumPushGround 0 VCN1-26CN4-26CN1-27CN4-27CN1-31CN1-29CN4-28CN1-30CN4-31CN4-29CN1-28CN4-30CN4-33CN1-34CN1-33CN4-34CN1-32CN4-32Open collector (200mA)0V = off, open collector = onn/cn/cn/cn/cn/cCN2CN1CN3CN4CN2CN3-1CN3-2Front PanelCharacteristicGroundConnectionsLoudspeaker OutputName0 V = PT T, 5 V pull-up = not PTT6k8 input impedance, 5mV sensitivityCN10 CN16Fan2PAReference FrequencyConnectionsFront P anel-20 dBm to 0 dBmCharacteristicNameCN5-1Forward Power Sense CN8Connections17 dBm ± 1 dBName CharacteristicRF OutputConnectionsPACN1-1Name Characteristic5 to 50 WCN4-1Antenna Port(Rear Panel)CN8Open collector (5mA)Open collector (5mA)Open collector (5mA)Data 1Data 0TTLTTLCN1-12CN1-13CN1-14CN1-15CN1-8 CN1-9CN1-10CN1-115 V pull-up5 V pull-upRF PA1 dBm carr ierRF DriveCN10CN3-1Connections Name CharacteristicRF PAPA HeatsinkCN6 Fan ControlGround 0V10V approx. or 26.5VCharacteristicConnections NameFanFan-10 V to -60 V at 6mATT L pull-up active lowRegulatorConnectionsRF PAName CharacteristicCN3-1CN3-2CN3-3 HeatsinkCN3 V Unreg-33 VGround Supply21.6 to 32 V0 Vn/c10143CN3-3 n/c n/cCN5CN4Reference Frequency(Front Panel)CN4-1CN3CN2CN4CN5CN7CN9CN6(-30.5 dBc ± 0.9 dB)Mains IECConnectorFiltered/Fused0 to 4 V / 0 to 6VFrequency TrimCN1-14 CN1-14CN1-50CN1-48CN1-49CN1-47CN1-45CN1-46CN1-44CN1-43CN1-42CN1-41CN1-15CN1-16CN1-21CN1-22CN1-23CN1-17CN1-19CN1-18CN1-20CN1-24CN1-25CN1-30CN1-26CN1-29CN1-28CN1-27CN1-31CN1-32CN1-33CN1-34CN1-36CN1-35CN1-37CN1-40CN1-39CN1-38CN1-50CN1-45CN1-43CN1-44CN1-47CN1-46CN1-49CN1-48CN1-28CN1-42CN1-41CN1-38CN1-39CN1-36CN1-37CN1-40CN1-32CN1-31CN1-29CN1-30CN1-34CN1-33CN1-35CN1-21CN1-24CN1-23CN1-22CN1-26CN1-27CN1-25CN1-17CN1-16CN1-15CN1-20CN1-19CN1-18TTLTTLTTLTTLTT L - Low OCXO fittedTTL - High fan onTTLBIT Control 3 (Not used)BIT Control 2 (Not used)Step Size (Not used)V/U DetectTR DetectReservedOCXO FittedFan EnableTTLTTLTTLTTLTTLTTL0 to 2.5 V10 mV / °C10 mV / °C0 to 5 V (5 V 3dB back off)TTLTTLTTLTTLTTLBIT Loop CorrectBIT Synth LockBIT Open LoopBIT V SW R OKBIT Control 1BIT Control 0Reflected PowerPA TemperatureAuto Level ControlExternal V SWRPAC TemperatureNarrow/Wide (Not used)Tx KeyTTLTTLTTLTTL0 VTTL0 VTT L pull up active lowTTLTTLTTLTTLFilter 3DataPhase LoadClockSynth LoadGroundFilter 4Filter 0Filter 2Filter 1GroundPower DownTx/Rx DetectCN1-10CN1-13CN1-12CN1-11PA ControlProcessorCN1-7CN1-7CN1-9CN1-10CN1-8CN1-12CN1-13CN1-11CN1-9CN1-8CN1-2CN1-3CN1-1CN1-5CN1-6CN1-4CN1-6CN1-5CN1-4CN1-2CN1-3CN1-1Connections0 to 2.5 V0 V±2.5 V±2.5 V0 to 2.5 V0 to 2.5 V0 to 2.5 V0 V0 V0 V0 V0 V0 VGroundGroundQGroundGroundBIT Q MonitorBIT I MonitorRF AGC (Not used)IGroundIF AGC (Not used)GroundGroundName Characteristic***A B C DCN8ProcessorCN8 RingCN8 Tip External Speaker DriveExternal Speaker Drive 3 Vac pk-pk maxCharacteristicConnections NameExternal Speaker12CN8 Sleeve Ground 0 V33 Vac pk-pk maxAntenna Change OverTTL pull-up active lowPotential range 0 V to 10 V6782435Pin Number1NameCN7ACN7ACN7ACN7An/cn/cn/cRTIPTRINGn/cTTIPRRING*6782435Pin Number1NameCN7BCN7BCN7BCN7BHDLC CL BHDLC CL AUnregulated SupplyHDLC R x BHDLC Tx BHDLC Rx AHDLC Tx AGround6782435Pin Number1NameCN7CCN7CCN7CCN7Cn/cUnregulated SupplyData Rx B (Data In +)Data T x B (Dat a Out +)Data Rx A (Data In -)Data T x A (Data Out -)Ground*6782435Pin Number1NameCN7DCN7DCN7DCN7DNot usedFast Antenna Change Over /PTTNot usedLine In +PTT InputLine In -Not usedGround*CharacteristicChar acteri sticChar acteri sticCharacteristic+20 dBm to -20 dBm 600R+20 dBm to -20 dBm 600R0 V0 V or +10 V to +60 V or-10 V to -60 V at 6mA+20 dBm to -20 dBm 600R+20 dBm to -20 dBm 600RANSI T1.403-1995 (T1),ITU-T: G.703 (E1)ANSI T1.403-1995 (T1),ITU-T: G.703 (E1)NPN open collectorgrounding transistor0 V or +10 V to +60 V or-10 V to -60 V at 6mA0VRS 422RS 422RS 422RS 422RS 422RS 42221.6V to 32VReservedRF PA Bias DisableTTL0 V7.5V pk-pk MaxOpen collector (5mA)EXTSPKRT1/E1MARC AUDIOMARC DAT AHDLCTTLRF PA PA ControlPA ControlPA Control0V21.6V to 32VRS 422RS 422RS 422RS 42213(Rear Panel)CN72Supply(shown inoff position)CN8 1 L2 N3EPower Supply1CN1432LNECN6CN1-4CN4CN9 LN0 VCharacteristic0 V = ono/c OKPSU OKCN6-3CN6-5CN6-40 VPSU offPSURegulationConnections NameCN6-6CN6-2CN6-1 0 VPSU OK0 V0 V OKCN4-3CN4-1 PSU off PSU off 0V = 0ff22(Rear Panel)Ground Supply 0 V29 VV Unreg 29 VR emote Supply On/OffLine In -50 W = 670 mVCharacteristicTT L - High for fan onTTL - High for bias onPA Bias EnableCN2-3CN2-5CN2-4Reflected PowerFan EnableRF PAConnections NameCN2-6CN2-2CN2-1 PA TemperatureDrive Detect10 mV/°C + 0.5V0.5 V for +10 dBmCN4CN9CN5CN7CN2CN12 PA Current Detect (not used) 0.1V per AmpPA ControlCN12T6S2VHF Tx Interconnection and Wiring
Back to TransmitterMain PageFig 3 Module Location DiagramPower SupplyT6 Series 2 VHF TransmitterModule Location DiagramProcessor ModuleVHF TX RF PA ModuleVHF TX PA Control ModuleFront Panel ModuleRegulation ModuleAntenna ConnectorFanTop view - Top Cover removedView on underside - Bottom Cover removedTx Module Location
Back to TransmitterMain PageFig 4 Processor Module - Removal andRefitting DetailPA CN8GA10931
Back to TransmitterMain PageFig 5 PSU Regulator Module - Removal and Refitting DetailBrown (L)Blue (N)CN3CN1CN2CN8CN7CN6GA10929
Back to TransmitterMain PageFig 6 PA Control Module - Removal andRefitting DetailCN5CN4CN5CN4CN3This connector will twist on itselfPC3
Back to TransmitterMain PageFig 7 Power Supply - Removal and Refitting DetailPower SupplyGA10928
Back to TransmitterMain PageFig 8 PA Module - Removal and Refitting DetailGA10930
Back to TransmitterMain PageFig 9 Front Panel Assembly PCB - Removaland Refitting DetailFront PanelFront panel PCBAllen head grub screwCN5 PA ControlDiagram BDiagram AGA10944, GA10927
Back to TransmitterMain PageFig 10 Cooling Fan - Removal andRefitting Detailpower connections hereFinger guardAIRFLOWGA10945

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