DTC Communications VXS250 Video Transmitter User Manual VTX 1920256B

DTC Communications Inc. Video Transmitter VTX 1920256B

manual

1/4 Watt Video Transmitter Operator GuideDTC COMMUNICATIONS INCORPORATEDVBS-250 Frequency 2400-2500MHzVBL-250 Frequency 1700-1850MHz1/4 Watt Video Transmitter Operator Guide
DTC COMMUNICATIONS, INC.2How to contact DTCFor operator and troubleshootinginformation, customers are encouraged to refer tothe details in this manual. For additional clarificationor instruction, or to order parts, contact DTC.Customer Service is available Monday throughFriday between the hours of 9:00 AM and 5:00 PMEST at:Tel: 603-880-4411Fax: 603-880-6965Website: www.dtccom.comEmail: info@dtccom.com486 Amherst StreetNashua, New Hampshire 03063USACopyright NoticeCopyright © 2002DTC Communications, Inc. All rightsreserved. No part of this document may bereproduced, transmitted, transcribed, stored in a re-trieval system or translated into anylanguage or computer language, in any form or byany means, including but not limited to electronic,magnetic, mechanical, optical, chemical, manual orotherwise, without the prior written permission of DTCCommunications, Inc.DisclaimerThe information in the document is subject to changewithout notice. DTC makes no representations or war-ranties with respect to the contents hereof, and spe-cifically disclaims any implied warranties of merchant-ability or fitness for a particular purpose. DTC reservesthe right to revise this publication and to make changesfrom time to time in the content hereof without obliga-tion of DTC to notify any person of such revision orchanges.TrademarksTrademarks of DTC Communications, Inc. include:• DTC• MiniPIX®• DynaPIX®Other product names used in this manual are the prop-erties of their respective owners.WarrantyDTC warrants its manufactured components againstdefects in material and workmanship for a period oftwo (2) years, commencing on the date of original pur-chase.Products manufactured by others that are approvedfor use with DTC equipment are warranted for themanufacturer’s warranty period, commencing from thedate of shipment from DTC.FCC informationThe following information is provided as aservice to our law enforcement customers whorequire a Part 90 station license for videosurveillance operations using the 2450 to 2483.5 MHzband.You will need to provide:• Form 600 (the application form)Forms can be obtained from the FCC on their web-site at:www.fcc.govYou can also contact the FCC using their FAX backservice at: (888) 418-3676Additional instructions are available by telephone at:(888) 225-5322The filing fee form is returned to:Federal Communications Commission1270 Fairfield RoadGettysburg, PA 17325-7245PN OP1920256 REV2
DTC COMMUNICATIONS, INC. 3NOTE Describes special issuesyou should be aware of whileusing a particular function.WARNING Calls out situations inwhich equipment could bedamaged or a process could beincorrectly implemented, but inwhich operator safety is not afactor.TIP Describes application hints.Manual Conventions Table of ContentsRF EXPOSURE STATEMENTIn bodyworn deployments, when installed as directed, this equipment complieswith the FCC radiation exposure limits set forth for an Occupational/Controlledenvironment. Only antennas specifically designed and tested by DTC for on-bodyapplications should be used.In General Population/Uncontrolled environments, proper spacing must bemaintained between the radiating surface of the antenna and any person’s body. Inthe case of a simple dipole antenna with (2.1 dBi gain), a minimum spacing of 2.5"must be maintained. In the case of gain antennas up to (17dBi), a minimumspacing of 12.5" must be maintained.
DTC COMMUNICATIONS, INC.4QUICK START GUIDE1Make sure that the ON/OFF switch is set to OFF. (Red dot is OFF).2Install 4 “AA” batteries in the internal battery compartment of the module. (Lithium batteries are recommended)Note: The module is power efficient, enabling 3 hours of operation.3Using a screwdriver, turn the channel selector to the correct transmissionchannel number.4Connect an antenna to the ANTENNA connector on the module.5Connect the microphone or microphones to the MIC-1 and MIC-2 connectorson the module.6Connect a video source to the Video/Multi I/O connector.7Slide the power switch to the ON position (Green dot is ON) to apply power tothe transmitter.Warning: Do not apply power tothe transmitter until an antennahas been connected in step 4.57 146VBS/VBL-250 Video Transmitter3Note: While installing the batteries, observe proper polarity as printedin the battery compartment. Reverse polarity protection is a built-indesign feature of the transmitter. If a battery is installed backwards, thisfeature prevents the transmitter from powering up, without damagingthe transmitter or battery. 2
DTC COMMUNICATIONS, INC. 5VBS/VBL-250 Video Transmitter OVERVIEWThe VBS and VBL transmitters are small module transmitters designed for both on and off body applications. They are part ofa family of video transmitters from DTC that provide 250mW, 2 Watts and 5 Watts output power.What should you expect to receive with your 250mW Transmitter?1 VBS/VBL Video Transmitter1 Dipole antenna with right angle SMA connector1 One Video and Power In “Y” cable1 DTC programming software and cableNOTE: The dipole antenna included is not recommended for normaluse! This antenna enables you to quickly set up your transmitter andensure proper operation. DTC highly recommends the use ofcircularly polarized antennas for the best rejection of multi-path.NOTE: DTC has provided you with a “Y” cable (power and video)terminated with a BNC connector for your convenience.DescriptionUser programmable video channels, selectable in 250kHz steps. Two userprogrammable audio sub carriers, selectable in 10kHz steps from 6 MHz to7.5MHz.• Audio sub carriers are OFF unless microphones are attached. Thetransmitter automatically senses when a microphone has been attached.• The audio sub carriers are phase locked, and will not drift into the videosignal.• Automatic Gain Control is provided on each audio input, amplifying softsounds.• They generate far less heat than a traditional video transmitters.• They operate significantly longer than traditional video transmitters on thesame power source.FeatureProgrammableEfficient Switching PowerSupply
DTC COMMUNICATIONS, INC.6Description•You may turn the device ON or OFF, remotely, by attaching a switch to oneof the pins on the Multi I/O connector. DTC provides hard-wired and wirelessswitches for this application.• The power applied to the Multi I/O pin is automatically looped through theunit, and available on a second pin to power a remote device, such as acamera. If you apply 9 Volts in, you will get 9 Volts out.WARNING:Make sure your camera will operate on the voltage beingsupplied to the transmitter.• The VBL/S series supports Ovation Micro ViewLock II encryption, whichadds approximately .35” to the width of the unit.FeatureRemote Switching CapabilityExternal Power Loop ThroughEncryption OptionFEATURES
DTC COMMUNICATIONS, INC. 7 SPECIFICATIONSSpecifications for the Module (VBS/VBL-250)Power Supply Internal batteries 4 “AA”lithium batteries or external 9-16Vdc.Power Consumption 2.5 Watts (not including camera)Battery life 3 hoursReverse polarityprotection yesDimensions 2.5x4.5x0.675”Camera Power Using external power input: Same as supply voltage,switched (200mA max)Using internal batteries: 5Vdc@175mA,switched (internalregulator)Controls 10 channel select rotary switch Panel mounted, slide ON/OFF switchVMx -2000 2 Watt Unit onlyConnectors 2 pin Lemo: Mic 12 pin Lemo: Mic 2SMA: Antenna6 pin Multi I/O: Video in, Data in, DC input 9-16Vdc,camera power, Remote ON/OFF, Multiplexed Data out,GroundProgrammability Video: 2400-2500MHz (VBS-250)1700-1850MHz (VBL-250) 250KHz resolution stepsAudio: User programmable from 6.0-7.5 MHz, in10kHz stepsChassis notes Machined solid aluminum with rounded edges.AudioGeneral Mic level input (line level factory opt.) 50-3000HzPhased locked with AGC on both inputs. Sub-carrier autosensing, only active when microphone is attached.Number of sub-carriers 2Sub-carriers frequencies 6.0-7.5MHz , user programmable
DTC COMMUNICATIONS, INC.8 SPECIFICATIONS Sub-carrier ON/OFFcontrol Subcarriers are activated when mic is connected.Subcarrier frequencystability +/- 0.003%, -30 to +70°CSub-Carrier Deviation 50kHz peakAudio S/N 45dB min.Frequency Response BW1.5dB = 50-3000HzTotal Harmonic Distortion <2%Input Level 8 mVpp@400Hz for 50 kHz peak dev.Pre-Emphasis 75uSInput Impedance 10k OhmVideoVideo FrequencyResponse BW1.5dB = 6 Hz - 5.0 MHzInput Input Impedance 75 OhmsInput Level 1Vp-p Max.S/N 60 dB min.Pre-Emphasis Per CCIR 405 525 line curveDifferential Gain 5%RFOperating Frequency 1700-1850MHz, 250KHz resolution steps2400-2500MHz, 250KHz resolution stepsPower output 250 mW min. @ nominal supply voltage, 25 Deg. C.-3dB @ 3.6Vdc int-2 dB over temp.Output Impedance 50 OhmsSpurs and Harmonicsoutput -50 dBcLoad Pull Stability 8:1 VSWR
DTC COMMUNICATIONS, INC. 9Frequency Stability +/- 0.003%, -30 to +50°CModulation Sensitivity 8MHz/V nom.Modulation SensitivityVariation +/- 5% across the bandPeak Carrier Deviation 4 MHz nom.Number of channels 10 max. (user programmable)Sub-carrier sidebandlevel -28dBc, +/- 2dBEnvironmentalTemperature Range -30 - +70°CHumidity 90% (non-condensing)SPECIFICATIONSBattery DrainBattery Type With Camera Without Cameralithium 3 Hours Min. 5 Hours Min.Alkaline Not Recommended 3 Hours Min.
DTC COMMUNICATIONS, INC.10CHANNEL SELECT SWITCHSelect a transmission channel by using the rotary switch located on the frontsurface of the transmitter. Use a screwdriver to rotate the switch to thedesired channel number.Channel Select SwitchCONNECTIONSLemo Male Part# (FFS.01.250.DLAE31)DTC Male Part # (8570003)Hirose Part# HR10A-7P-6P (02)DTC Part # 954020Standard Male SMA connectorMATING CONNECTORS
DTC COMMUNICATIONS, INC. 11ANTENNASA standard SMA connector is used as the antenna connector on both the VBS/VBL-250. Refer to a list of DTC antennas available on page 21.CHASSIS MOUNTED POWER ON/OFF SWITCHA slide switch is provided for local control of power ON and OFF. Green dot is ON,Red dot is OFF.MICROPHONE CONNECTORSTwo connectors accommodate two microphone inputs. Each connector has twocontacts and provides power to the microphone as well as connecting the audiosignal into the transmitter. The audio sub-carriers are activated by the presence ofthe microphone. If a microphone is removed, that sub-carrier is removed from thetransmit signal. Turning off the unused sub-carrier saves power and may improvepicture quality.CONNECTIONSNOTE: REMOTE ON overrides thechassis mounted ON/OFF switch.(i.e. When the chassis mountedpower switch is set to OFF,REMOTE ON can be used to turnthe transmitter ON.)TIP You may use the VBS/VBL seriestransmitters with other manufacturersantennas. Verify that they are suited forthe band you are operating in.Microphone ConnectorsOn/OFFSwitchAntenna Connector
DTC COMMUNICATIONS, INC.12MULTI I/O CONNECTORThe multi I/O (6-pin Multi I/O) connector is mainly used as the video and externalpower input connector. It also provides access to many transmitter functions, suchas:• Programming the device• Video in• Power in• Remote on• Camera powerCONNECTIONSMulti I/O ConnectorUSING THE MULTI I/O CONNECTION FOR DIFFERENT EQUIPMENTCONFIGURATIONSPin 3: Camera Power OutputNOTE: Same as supplyvoltage. Do not exceed200mA.Pin 1: GroundPin 2: Ext power input 9-16VDCPin 6: Video inPin 5: RS-232 inPin 4: Remote On,switched to groundmultiplexed RS-232 outNOTE: Remote Onoverrides the chassismounted ON/OFFswitch.
DTC COMMUNICATIONS, INC. 13NOTE: You will need externalcamera power if voltage to thetransmitter is not compatible withyour camera’s operating voltage,and/or you need greater batterylife, and/or your camera drawsmore than 200mA.This equipment configuration shows thevideo signal coming in, and an externalDC Power source for the transmitteronly at 9-16V. It is also configured witha seperate DC power source for thecamera.The “remote on” function isaccomplished by connecting the remoteon to ground (optional feature).Video In, External DC for Transmitter,External DC for Camera and optionalRemote OnUSING A SEPARATE CAMERA POWER SOURCE
DTC COMMUNICATIONS, INC.14Video In, External DC, Camera Power, and optional RemoteOnUSING LOOP THROUGH, SINGLE POWER SOURCE, FOR TRANSMITTER AND CAMERANOTE: You will need externalcamera power if voltage to thetransmitter is not compatible withcamera’s operating voltage, and/or you need greater battery life,and/or your camera draws morethan 200mA.This equipment configuration shows thevideo signal coming in, and an externalDC Power source for the transmitterand camera at 9-16V. The powersource for the camera is an internalloop. The “Remote On” function isaccomplished by connecting theRemote On to ground.
DTC COMMUNICATIONS, INC. 15USING LOOP THROUGH, BATTERY POWER SOURCE, FOR TRANSMITTER ANDCAMERAVideo In, Internal Battery Power, Camera Power, and optionalRemote OnThis equipment configuration shows thevideo signal coming in, with an internalbattery power source loop whichpowers the camera and the transmitter.The “Remote On” function is accom-plished by connecting the Remote Onto ground.
DTC COMMUNICATIONS, INC.16USING A SEPARATE CAMERA POWER SOURCEVideo In, Battery Powered Transmitter, External Power forCamera only and Remote OnNOTE: You will need externalcamera power if voltage to thetransmitter is not compatible withcamera’s operating voltage, and/or you need greater battery life,and/or your camera draws morethan 200mA.This equipment configuration usesinternal battery power for the transmit-ter and an external power source forthe camera. The video signal comesinto the transmitter. The “Remote On”function is accomplished by connectingthe “Remote On” to ground.
DTC COMMUNICATIONS, INC. 17COMPONENTSPart Number Description7011145-012 Microphone, 12” length7011145-024 Microphone, 24” length7011145-036 Microphone, 36” length7011145-048 Microphone, 48” length7011145-072 Microphone, 6’ length7011145-144 Microphone 12’ length4045170-024 Video In cable, Mullti-I/O to RCA(M)with RCA/BNC adaptor, 24” standard4045171-024 Video In/EXT Power cable, 24”standardVideo In: Multi I/O to RCA(M) with BNCadaptor Ext. Power: 24 AWG wirestripped and tinned leads.List of Optional AccessoriesNOTE: To order a custom cable length, change the-xxxin the part number to reflect the dimension in inches.
DTC COMMUNICATIONS, INC.18COMPONENTSPart Number Description4045173 Programming cable(Connects from the Multi I/Oconnector to the DB9 connector)4045174-006 Antenna cable, SMA to TNC,6”standard lengthD cell battery packList of Optional AccessoriesNOTE: To order a custom cable length, change the -xxxin the part number to reflect the dimension in inches.
DTC COMMUNICATIONS, INC. 19VW-ANT-2-SMA VidiWire antenna system 2.4-2.5 GHzVW-ANT-1-SMA VidiWire antenna system 1.7-1.9 GHzPart Number DescriptionList of Optional AccessoriesThe VidiWire™ antenna system was specifically designed for video transmissionfrom on-body transmitters. This DTC Proprietary system provides the best possibleomnidirectional video transmission from a body-worn system. The system iscomposed of three parts: two special patch-type antennas, and a phasing module.When used in conjunction with a DynaPix™ diversity receiver system, the bestpossible performance will be obtained.WARNING: VidiWire Antennas are housed in a milled aluminum coverwhich shields the wearer from RF energy. Make sure the antennas radiat-ing side is directed away from the body.WARNING: Do not use the VidiWire antenna system on the body with anytransmitter outputting more than 250mW of RF energy.ANT-5-PIG 5 dBi Patch AntennaConnector: SMA or TNC Male on 18"coax. “pigtail”. ANTENNASDTC has developed a series of circularly polarized patch antennas for use in the2.0 to 2.5 GHz indoor and short-term outdoor installations. The ANT-5-P is a 5dbigain, 90 degree wide beamwidth, antenna, mounted on a 0.125 in. thick aluminumplate. Typical uses include disguised transmitters (i.e. tissue box), and vehicular-mounted transmitter antennas and in a variety of receive applications.
DTC COMMUNICATIONS, INC.20ANTENNAS List of Optional AccessoriesPart Number DescriptionANT-VIL Dipole Antenna 1.70-1.85 GHz withright angle SMA adaptorANT-VIS Dipole Antenna 2.4-2.5 GHz withright angle SMA adaptorThe ANT-VIL/S is a 1/2 wave coaxial dipole portable duck antenna. It can bemounted directly to the video transmitter, or at a right angle using the adaptorprovided.7011129 ANT-2 2dB: Dipole 1.7-1.85GHz*Must be used with SMA to TNCantenna cable (4045174-006).7011131 ANT-2 2dB: Dipole 2.4-2.5 GHz*Mustbe used with SMA to TNC antennacable (4045174-006).ANT-2 is a rugged, lightweight linearly polarized dipole for use in the 2.4 to 2.5GHz and 1.7-1.85 GHz bands. It can be mounted at the end of a cable with acompatible connector. This antenna is ground plane independent.
DTC COMMUNICATIONS, INC. 21 dBic Wideband PanelConnector: TNC FemaleANTENNASPart Number DescriptionDTC has developed a series of circularly polarized panel antennas for use inwideband transmit and receive applications from 1.7 to 2.7 GHz.The ANT-10-R is a very wide bandwidth, unidirectional log-spiral array. Thisantenna has useful gain, with some sidelobe variation, to 4 GHz.It can be mounted to a wall or swivel mounted with the MAF-1 grip on two sur-faces, via two pairs of “1¦4-20” tapped holes located in the rear center and thebottom center of the aluminum housing. The front of theantenna is a radome made of a polycarbonate material. The antenna is suitable forindoor and short-term outdoor use. It must be protected for extended outdoor useand installations since it is not waterproof.DTC developed this very high gain RHCP antenna for the 2.4 to 2.5 GHz band. Itprovides unidirectional broadside coverage. Unlike conventional Yagi antennas,this antenna is especially suitable for wall mounting. This panel antenna is usefulin long-range receive applications, applications in high, multi-path environments,where it is impractical or impossible to mount a dish antenna.ANT-17-RANT-10917 dBic Directional Patch ArrayConnector: TNC Male on 18" coax.“pigtail”
DTC COMMUNICATIONS, INC.22DTC has built in a lot of flexibility in the programming options you have on theVBL and VBS series transmitters. You can choose to use some, all or none ofthis flexibility.When you order a VBL or VBS transmitter, DTC will factory program yourfrequencies at no additional charge to you. You may want to place a stickerover the rotary switch on the chassis, so users in the field don’t attempt tochange frequencies. This is often the best path for state and local agencieswith limited frequencies available to them.DTC will also provide you with free software and a free programming cable,enabling you to change your video frequencies and their associated audio sub-carriers. This ideal if you often work with other agencies, or anticipate theequipment being used by a multi-jurisdictional task force. You can program upto ten channel settings per unit. In general, this allows you to program mostvariations you might encounter in the field at the depot level.As a practical matter, your VBL or VBS transmitter’s video frequencies andaudio sub-carriers will be dictated by the frequency and sub-carriers(s) of yourreceiver and/or repeater. In many cases, these devices are crystal controlledor have few channel options. PROGRAMMING IntroductionTIP: Make sure that you programyour transmitter to match thefrequencies and audio sub-carriers or your receiver, and testthe components as a systemprior to going into the field!
DTC COMMUNICATIONS, INC. 23PROGRAMMINGInstalling DTC Universal Programming Software on your PCNOTE: Uninstall any previous versions by going to Add/Remove Pro-grams, clicking on DTC Universal Programming, and clicking on uninstall.1Click on Start, click on run.2Click on the Browse button.3Click on or find your CD drive.4Install the JAVA Runtime Environment Application first (CD provided).5Follow the install wizard screens.6Install the Universal Programming software next (floppy provided).7Click on Start, click on run.8Click on the Browse Button.9Click on your floppy drive.10 Double click on the setup.11 Follow the install wizard screens.12 Your programming software is installed.
DTC COMMUNICATIONS, INC.24 PROGRAMMING Programming1Make sure the video transmitter ON/OFF. The red dot is OFF.2Make sure the transmitter has an antenna installed into the antennaconnector prior to programming.3Install the programming cable into the Multi I/O connector on the transmit-ter4Connect the programming cable into a power source.5Plug the serial cable of the programming cable into the COM1 or COM2port of your computer and turn thetransmitter switch to ON. The green dot is ON.6Select Start, programs, DTC communications on your computer.7The system allows you to select device COM1 or COM2, depending onwhich serial port you are connected to.8Follow the instructions on the DTC Universal Programming screens tobegin the download process.9The frequency settings that are currently in your transmitter are down-loaded to your computer.10 Click on the “Tx Channel” tab in the programmer screen.11 Select a channel and click on the Edit Channel button to change settings.12 Enter your new frequency and settings.13 To change any of the MIC-2 or MIC-1 settings, click on the settingsprovided, then click OK.14 Click on the Upload button to upload your new settings to the transmitter.Your new settings have been installed.
486 Amherst Street • Nashua, New Hampshire 03063 • 603-880-4411 www.dtccom.com

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