Tait TEL0061 Paging Transmitter User Manual T857 A4 pages

Tait Limited Paging Transmitter T857 A4 pages

Exciter Specification

C1.8T856/857 General InformationM850-0029/02/00 Copyright TEL1.2 Specifications1.2.1 IntroductionThe performance figures given are minimum figures, unless otherwise indicated, forequipment tuned with the maximum switching range and operating at standard roomtemperature (+22°C to +28°C) and standard test voltage (13.8V DC).Where applicable, the test methods used to obtain the following performance figuresare those described in the EIA and ETS specifications. However, there are severalparameters for which performance according to the CEPT specification is given. Referto Section 1.2.6 for details of test standards.Details of test methods and the conditions which apply for Type Approval testing in allcountries can be obtained from Tait Electronics Ltd.The terms "wide bandwidth", "mid bandwidth" and "narrow bandwidth" used in thisand following sections are defined in the following table.1.2.2 GeneralNumber Of Channels .. 128 (standard)1Supply Voltage:Operating Voltage .. 10.8 to 16V DC Standard Test Voltage .. 13.8V DC Polarity .. negative earth only Polarity Protection .. crowbar diode Line Keying Supply (if required) .. -50V DCSupply Current:Transmit - T856 .. 5.5A (typical)- T857 .. 750mAStandby - T856 .. 165mA (typical)- T857 .. 150mA (typical)Operating Temperature Range .. -20°C to +60°CChannel Spacing Modulation100% DeviationReceiverIF BandwidthWide Bandwidth 25kHz ±5.0kHz 15.0kHzMid Bandwidth 20kHz ±4.0kHz 12.0kHzNarrow Bandwidth 12.5kHz ±2.5kHz 7.5kHz1. Additional channels may be factory programmed. Contact your nearest Tait Dealer or Customer Service Organisation.
M850-00T856/857 General InformationC1.9Copyright TEL 29/02/00Dimensions: Height .. 183mm Width .. 60mm Length .. 322mmWeight .. 2.1kgTime-Out Timer (optional) .. 0 to 5 minutes1 adjustable in 10 sec-ond stepsTail Timer .. 0 to 5 seconds adjustable in 100ms2stepsTransmit Key Time .. <30ms Transmit Lockout Timer .. 0 to 1 minute adjustable in 10 secondsteps1.2.3 RF SectionFrequency Range .. 400-520MHz (refer to Section 1.4 andSection 1.5)Modulation Type .. FMFrequency Increment .. 5 or 6.25kHzSwitching Range .. 8MHz (i.e. ±4MHz from the centrefrequency)Load Impedance .. 50 ohmsFrequency Stability .. ±1ppm, -20°C to +60°C(see also Section 1.4 and Section 1.5)Adjacent Channel Power (full deviation): Wide Bandwidth (WB) .. -75dBc(±25kHz/15kHz B/W) Mid Bandwidth (MB) .. -70dBc(±20kHz/12kHz B/W)Narrow Bandwidth (NB) .. -65dBc(±12.5kHz/7.5kHz B/W)Transmitter Switching .. complies with ETS 300 1131. Adjustable from 0 to 10 minutes in PGM800Win version 2.12 and later.2. Adjustable in 20ms steps in PGM800Win version 2.12 and later.
C1.10T856/857 General InformationM850-0029/02/00 Copyright TELTransmitter Side Band Noise:(no modulation, 15kHz bandwidth) At ±25kHz .. -95dBc At ±1MHz .. -105dBcIntermodulation .. -40dBc with interfering signal of-30dBc.. -70dBc with 25dB isolation& interfering signal of -30dBc(PA with output isolator)T856 Mismatch Capability: Ruggedness .. refer to your nearest Tait Dealer orCustomer Service Organisation Stability .. 3:1 VSWR (all phase angles)Radiated Spurious Emissions:Transmit .. -36dBm to 1GHz -30dBm 1GHz to 4GHz Standby .. -57dBm to 1GHz -47dBm 1GHz to 4GHzConducted Spurious Emissions: (T856 Only)Transmit .. -36dBm to 1GHz -30dBm 1GHz to 4GHz Standby .. -57dBm to 1GHz -47dBm 1GHz to 4GHzPower Output:T856 - Rated Power .. 25W (see Duty Cycle)- Range Of Adjustment .. 5-25WT857 .. 1W ±300mWDuty Cycle (T856 Only) .. 100% @ 25W at +25°C.. 25% @ 25W at +60°C.. 100% @ 10W at +40°C1.2.4 Audio Processor1.2.4.1 InputsInputs Available .. line, microphone and CTCSSLine Input: Impedance .. 600 ohms (balanced) Sensitivity (60% modulation @ 1kHz)- With Compressor .. -50dBm Without Compressor .. -30dBm
M850-00T856/857 General InformationC1.11Copyright TEL 29/02/00Microphone Input: Impedance .. 600 ohms Sensitivity (60% modulation @ 1kHz)- With Compressor .. -70dBm Without Compressor .. -50dBm1.2.4.2 Modulation CharacteristicsFrequency Response .. flat or pre-emphasised (optional) (below limiting)Line And Microphone Inputs: Pre-emphasised Response- Bandwidth .. 300Hz to 3kHz (WB & MB).. 300Hz to 2.55kHz (NB)Below Limiting .. within +1, -3dB of a 6dB/octavepre-emphasis characteristic Flat Response .. within +1, -2dB of output at 1kHzAbove Limiting Response .. within +1, -2dB of a flat response(ref. 1kHz)Distortion .. 2% max.Hum And Noise: Wide Bandwidth .. -55dB (300Hz to 3kHz [EIA]) typical Mid Bandwidth .. -54dB (CEPT)Narrow Bandwidth .. -50dB (CEPT) Compressor (optional): Attack Time .. 10ms Decay Time .. 800ms Range .. 50dB1.2.4.3 CTCSSStandard Tones .. all 37 EIA group A, B and C tonesplus 13 commonly used tonesFrequency Error .. 0.08% max.(from EIA tones)Generated Tone Distortion .. 1.2% max.Generated Tone Flatness .. flat across 67 to 250.3Hz to within 1dBModulation Level .. adjustableModulated Distortion .. <5%
C1.12T856/857 General InformationM850-0029/02/00 Copyright TEL1.2.5 MicrocontrollerAuxiliary Ports:Open Drain Type .. capable of sinking 2.25mA via 2k2ΩVds max. .. 5V1.2.6 Test StandardsWhere applicable, this equipment is tested in accordance with the following standards.1.2.6.1 European Telecommunication StandardETS 300 086 January 1991Radio equipment and systems; land mobile service; technical characteristics and testconditions for radio equipment with an internal or external RF connector intended pri-marily for analogue speech.ETS 300 113 March 1996Radio equipment and systems; land mobile service; technical characteristics and testconditions for radio equipment intended for the transmission of data (and speech) andhaving an antenna connector.ETS 300 219 October 1993Radio equipment and systems; land mobile service; technical characteristics and testconditions for radio equipment transmitting signals to initiate a specific response in thereceiver.ETS 300 279 February 1996Radio equipment and systems; electromagnetic compatibility (EMC) standard for pri-vate land mobile radio (PMR) and ancillary equipment (speech and/or non-speech).1.2.6.2 DTI CEPT Recommendation T/R-24-01Annex I: 1988Technical characteristics and test conditions for radio equipment in the land mobileservice intended primarily for analogue speech.Annex II: 1988Technical characteristics of radio equipment in the land mobile service with regard toquality and stability of transmission.1.2.6.3 Telecommunications Industry AssociationANSI/TIA/EIA-603-1992Land mobile FM or PM communications equipment measurement and performancestandards.

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