DTC Communications VXS250 Video Transmitter User Manual VTX 1920256

DTC Communications Inc. Video Transmitter VTX 1920256

Manual

DTC COMMUNICATIONS INCORPORATED PN OP1920256 REV6VBS2-250 Frequency 2200-2300 MHzVBS-250 Frequency 2400-2500 MHzVBL-250 Frequency 1700-1850 MHz1/4 W1/4 W1/4 W1/4 W1/4 Watt, Body Watt, Body Watt, Body Watt, Body Watt, Body WornornornornornVVVVVideo Tideo Tideo Tideo Tideo TransmitterransmitterransmitterransmitterransmitterManualManualManualManualManual
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 17325-7245
DTC COMMUNICATIONS, INC. 3Manual ConventionsNOTE Describes special issues you should be aware ofwhile using a particular function.WARNING Calls out situations in which equipmentcould be damaged or a process could be incorrectlyimplemented, but in which operator safety is not afactor.TIP Describes application hints.TABLE OF CONTENTSRF EXPOSURE STATEMENTWhen used as directed, the maximum SAR of this device is2.7 W/kg, which meets the limits set forth by the FCC. Referto Appendix A in this manual for instruction in the proper useof antennas with this device.Quick Start ........................................................................... 4Overview .............................................................................. 5Features ............................................................................... 6Specifications ....................................................................... 7Battery Drain ........................................................................ 9Connectors ......................................................................... 10Connections ........................................................................11Equipment Configurations ................................................. 13Optional Accessories ........................................................ 14Programming ..................................................................... 22Appendix A ......................................................................... 26FCC ID# H25VXS250
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)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.Note: While installing the batteries, observe proper polarity as printed in thebattery compartment. Reverse polarity protection is a built-in design feature ofthe transmitter. If a battery is installed backwards, this feature prevents thetransmitter from powering up, without damaging the transmitter or battery.Warning: Do not apply power to the transmitter until an antenna has beenconnected in step 4.Warning: Refer to Appendix A of this manual for information on the properuse of antennas.57 1463 2
DTC COMMUNICATIONS, INC. 5OVERVIEWWhat should you expect to receive with your 250mWTransmitter?1 VBS/VBL Video Transmitter1 Dipole antenna with right angle SMA connector1 One Video and Power In “Y” cable1 DTC programming software package1 DTC programming cable8 BatteriesNOTE: The dipole antenna included is not recommended for normaluse! This antenna enables you to quickly set up your transmitterand ensure 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 an RCA connector and a BNC adapter for yourconvenience.)The VBL/VBS series video transmitters from DTC represent the first true “video body wires” available. DTC has developed afully user programmable video transmitter and mated it with an integral AA battery pack. This dramatically simplifies wiring,lowers the risk of detection, and increases the chances of operational success.For best results, DTC recommends the use of its VidiWIRE on body dual patch antenna system with phase matching module,and a DTC diversity receiver.Users should also consider using the VBL/VBS series transmitters for rapid deployment drop cameras. Packaging thetransmitters with miniature board cameras is exceptionally easy, and in the case of 5 volt cameras, power may be provided tothe camera directly from the VBL/VBS transmitter’s internal battery pack.This product in only available for sale to legitimate state, local, federal and friendly foreign government agencies.
DTC COMMUNICATIONS, INC.6FEATURESFeature DescriptionRemote Switching CapabilityExternal Power Loop ThroughProgrammableAudioEfficient Switching Power SupplyCamera Power Available throughMulti I/O Connector•You may turn the device ON 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. Applying power throughthe multi I/O connector automatically disables the internal AA battery pack.WARNING: Make sure your camera will operate on the voltage being suppliedto the transmitter.User programmable video channels, selectable in 250 kHz steps. Two userprogrammable audio sub carriers, selectable in 10 kHz steps from 6 MHz to7.5 MHz.• 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.• When powering the device using the internal battery pack, regulated 5 VDC isavailable on the multi I/O connector, limited to 200 mA current drain.
DTC COMMUNICATIONS, INC. 7SPECIFICATIONSSpecifications for the body worn VBS/VBL-250Power Supply Internal batteries 4 “AA” batteries or external 9-16 VDC.Power Consumption 2.5 Watts (not including camera)Battery life 3 hours - Alkaline AAReverse polarityprotection YesDimensions 2.5 x 4.5 x 0.675”Camera Power Using external power input: Same as supply voltage,switched (200 mA max)Using internal batteries: 5 VDC @ 175 mA, switched(internal regulator)Controls 10 channel select rotary switchPanel mounted, slide ON/OFF switchConnectors 2 pin Lemo: Mic 12 pin Lemo: Mic 2SMA: Antenna6 pin Multi I/O: Video in, Data in, DC input 9 -16 VDC,camera power, Remote ON/OFF, Multiplexed Data out,GroundProgrammability Video: 2400 - 2500 MHz (VBS-250)1700 - 1850 MHz (VBL-250)250 KHz resolution stepsAudio: User programmable from 6.0 - 7.5 MHz, in10 kHz stepsChassis notes Machined solid aluminum with rounded edges.AudioGeneral Mic level input (line level factory opt.) 50 - 3000 HzPhased locked with AGC on both inputs. Sub-carrier autosensing, only active when microphone is attached.Number of sub-carriers 2Sub-carriers frequencies 6.0 - 7.5 MHz , user programmableFour lithium “AA” batteriesFRONT PATCH ANTENNABACK PATCHANTENNASPLITTERCAMERAMICROPHONESTRANSMITTER
DTC COMMUNICATIONS, INC.8SPECIFICATIONS Sub-carrier ON/OFFcontrol Subcarriers are activated when mic is connected.Subcarrier frequencystability +/- 0.003%, -30°C to +70°CSub-Carrier Deviation 50 kHz peakAudio S/N 45 dB min.Frequency Response BW1.5dB = 50 - 3000 HzTotal Harmonic Distortion <2%Input Level 8 mVpp @ 400 Hz for 50 kHz peak dev.Pre-Emphasis 75 uSInput Impedance 10 k OhmVideoVideo FrequencyResponse BW1.5dB = 6 Hz - 5.0 MHzInput 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 - 1850 MHz, 250 KHz resolution steps2400 - 2500 MHz, 250 KHz resolution stepsPower output 250 mW min. @ nominal supply voltage, 25 Deg. C.-3 dB @ 3.6 VDC 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°C to +50°CModulation Sensitivity 8 MHz/V nom.Modulation SensitivityVariation +/- 5% across the bandPeak Carrier Deviation 4 MHz nom.Number of channels 10 max. (user programmable)Sub-carrier sidebandlevel -28 dBc, +/- 2 dBEnvironmentalTemperature Range -30°C - +70°CHumidity 90% (non-condensing)SPECIFICATIONSFour lithium batteriesTransmitter & CameraBattery Type Part Number Transmitter Only Camera 9V@153mA Camera 12V@120mA9 AA Alkaline Pack 4045131 6 hours 3.3 hours 3.6 hours(External)9 AA Lithium 4045132 9 hours 5 hours 5.5 hours(External)9 AA NiMH 4045130 7 hours 4 hours 4.3 hoursRechargeable(External)4 AA(Internal)4 AA Lithium(Internal
DTC COMMUNICATIONS, INC.10MICROPHONE 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 of themicrophone. If a microphone is removed, that sub-carrier is removed from thetransmit signal. Turning off the unused sub-carrier saves power and improves picturequality.CONNECTORSMicrophone ConnectorsLemo 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 beginning on page 18.TIP: You may use the VBS/VBL series transmitters with other manufacturersantennas. Verify that they are suited for the band you are operating in.WARNING: Refer to Appendix A of this manual for information on the proper useof antennas.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.NOTE: REMOTE ON overrides the chassis mounted OFF switch. (i.e. When thechassis mounted power switch is set to OFF, REMOTE ON can be used to turnthe transmitter ON.)CHANNEL SELECT SWITCHSelect a transmission channel by using the rotary switch located on the front surface ofthe transmitter. Use a screwdriver to rotate the switch to the desired channel number.MULTI 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, such as:• Programming the device• Video in• Power in• Remote on• Camera powerCONNECTIONSOn/OFFSwitchAntenna ConnectorChannel SelectMulti I/O ConnectorNOTE: Same as supply voltage. Donot exceed 200mA.Pin 3: CameraPower OutputPin 1: GroundPin 2: Ext powerinput 9-16VDCPin 6: Video inPin 5: RS-232 inPin 4: Remote on,switched to ground
DTC COMMUNICATIONS, INC.12EXTERNAL CAMERA POWERTRANSMITTERSPLITTERCAMERAFRONT PATCHANTENNABACK PATCHANTENNAMICROPHONEMICROPHONE+-The basic VBS/VBL-250 configurationconsists of the video transmitter, Vidi-WireAntenna, and DTC cable part number4045170-024. This cable is connected to themulti I/O port of the transmitter, and isconfigured to supply:• The video signal from the camera to thetransmitter.• Power to the transmitter through theinternal battery pack.NOTE: You will need external camerapower if voltage to the transmitter is notcompatible with your camera’s operatingvoltage, and/or you need greater batterylife, and/or your camera draws more than200mA.
DTC COMMUNICATIONS, INC. 13The basic VBS/VBL-250 configuration consistsof the video transmitter, Vidi-Wire Antenna, andDTC cable part number 4045194-024. Thiscable is connected to the multi I/O port of thetransmitter, and is configured to supply:• The video signal from the camera to thetransmitter.• Power to the transmitter and camerathrough the internal battery pack.FRONT PATCH ANTENNABACK PATCHANTENNASPLITTERCAMERAMICROPHONESTRANSMITTERTRANSMITTER AND CAMERA (INT)
DTC COMMUNICATIONS, INC.14 EXTERNAL TRANSMITTER POWER The VMS/VML-250 configuration, which usesthe loop through power source for the camera,consists of the video transmitter and DTC cablepart number 4045189-024 . This cable isconnected to the multi I/O port of the transmit-ter.It is configured to supply:• The video signal to the transmitterfrom the camera.• Power to the transmitter through amolex connector that can be easilyconnected to DTC’s battery packs.• Power to the camera through amolex connector that can easily beconnected to DTC’s optionalcameras.CAMERAANTENNAPOWER SOURCEfor transmitter only, 9-16 V.STRIPPED ANDTINNED LEADSSTANDARDABCOPTIONALBATTERYPACKSTRANSMITTERA4045131 (AA non-rechargeable)B4045177( D-Cell battery pack)AlkalineC4045130 (AA rechargeable)MiMH
DTC COMMUNICATIONS, INC. 15NOTE: You will need external camera power ifvoltage to the transmitter is not compatiblewith camera’s operating voltage, and/or youneed greater battery life, and/or your cameradraws more than 200mA.This configuration consists of the video transmitter,Vidi-Wire antenna, and DTC cable part number4045192-024. This cable is connected to the multi/IO port of the transmitter, and is configured tosupply:• The video signal from the camera to thetransmitter.• Power to the transmitter and camera throughthe internal battery pack.• Remote on function through a hard wiredswitch or remote Key FOB transmitter. Thisremote on function overrides the OFF switchlocated on the transmitter chassis.ADDING REMOTE ON FUNCTION TO BASICFRONT PATCH ANTENNABACK PATCHANTENNASPLITTERCAMERAMICROPHONESTRANSMITTERHARD WIREDSWITCHKEY FOBSWITCHRECEIVERKEY FOBSWITCHTRANSMITTERSTRIPPED ANDTINNED LEADSSTANDARD
DTC COMMUNICATIONS, INC.16ACCESSORIES Part Number Description1088185 Vidi Vest™The VidiVest™ is designed to be used in conjunction withDTC’s body worn video transmitter. The vest suppliescompartments for the video transmitter, associated wiring,antenna system (i.e. VidiWire™), microphones, and a buttoncamera. The garment is ventilated for comfort and can beadjusted with velcro straps at the waist and shoulders. Thevest is intended to be worn as an undergarment with a loosefitting shirt or other garment over the vest.4045181 Camera with 3-pin connectorAssemblyThis camera is a high-resolution color CCD type, which hasbeen modified to look like a shirt button. This allows for easyconcealment through a regular button hole.4045192-024 VidiVest cable harnessThis cable harness connects all of the components, such as,the transmitter, battery packs, microphones, and VidiWireantenna system.
DTC COMMUNICATIONS, INC. 17Part Number DescriptionVW-ANT-2-SMA VidiWire antenna system 2.4-2.5 GHzVW-ANT-1-SMA VidiWire antenna system 1.7-1.9 GHzThe VidiWire™ antenna system was specifically designed for video transmissionfrom on-body transmitters. This DTC Proprietary system provides the bestpossible omnidirectional video transmission from a body-worn system. Thesystem is composed of three parts: two special patch-type antennas, and aphasing module.WARNING: VidiWire Antennas are housed in a milled aluminum cover whichshields the wearer from RF energy. Make sure the antennas radiating side isdirected away from the body.WARNING: Do not use the VidiWire antenna system on the body with anytransmitter outputting more than 250mW of RF energy.COMPONENTSWARNING: Refer to Appendix A of this manual for information on the properuse of antennas.SpecificationsType DTC proprietaryVidiWire™ designPolarization Dual PolarizedPeak Gain Pseudo-IsotropicHorizontal Beamwidth OmnidirectionalVertical Beamwidth OmnidirectionalNominal Impedance 50 OhmsGroundplane Requirements Not applicableSize Antennas: 2.0” W x 2.0” H x 0.25” D(51 mm x 51 mm x 6.35 mm) Phasing Unit 2.0” W x 1.5” H x 0.25” D(51mm x 38mm x 6.35mm)Net Weight 6ozVW-ANT-2-SMA 2.4 to 2.5 GHz SMA male connectorVW-ANT-2-TNC 2.4 to 2.5 GHz TNC male connectorVW-ANT-1-SMA 1.7 to 1.9 GHz SMA male connector
DTC COMMUNICATIONS, INC.18 ACCESSORIES Part Number Description4045170-024 Video In, 24”standard.Video In: Multi I/O to RCA(M) with BNCadaptor. (YELLOW)4045193-024 Video In/Remote On, 24”standard.Video In: Multi I/O to RCA(M) with BNCadaptor. (YELLOW)Remote On: 24 AWG wire with a molexconnector and stripped and tinned leads. (GREEN)4045189-024 Video In/EXT Power/Camera Power cable, 24”standard.Video In: Multi I/O to RCA(M) with BNCadaptor. (YELLOW)Ext. Power: 24 AWG wire with a molex connectorand stripped and tinned leads. (RED)Camera Power:24 AWG wire with a molexconnector and stripped and tinned leads.(GRAY)
DTC COMMUNICATIONS, INC. 19 ACCESSORIESPart Number Description4045194-024 Video In/Camera Power, 24”standard.Video In: Multi I/O to RCA(M) with BNCadaptor. (YELLOW)Camera Power: 24 AWG wire with a molexconnector and stripped and tinned leads. (GRAY)4045192-024 Video In/Camera Power/Remote On, 24”standard.Video In: Multi I/O to RCA(M) with BNCadaptor. (YELLOW)Camera Power: 24 AWG wire with a molexconnector and stripped and tinned leads.(GRAY)Remote On: 24 AWG wire with a molexconnector and stripped and tinned leads. (GREEN)
DTC COMMUNICATIONS, INC.20ANTENNAS Part Number DescriptionVDAR-1 Single 5 dBic “Hybrid-Patch”™ Antenna with mountingoptions.Connector: TNC Female on chassisThe VDAR video antennas are designed to operate with traditional single videoreceivers and multiple antenna configurations for diversity receivers. The antennauses the DTC Hybrid-Patch system to ensure high purity circular polarization. Thisensures the highest possible performance in video reception, especially indiversity systems. It is available in three different bands. Reversible and adjust-able suction cup mounts come standard for quick and easy installation on theinside or outside of window or other hard, smooth surfaces.VDAR-1SpecificationsType Three Hybrid Patch™elementsPolarization RHCPPeak Gain 5dBicHorizontal Beamwidth 90°Vertical Beamwidth 90°Nominal Impedance 50 OhmsGroundplane Req. Built-inSize 6.6” H x 6.6” W(167mm x 167 mm)Weight 12 Oz. (34g)DTC Part Number Frequency Range7011156-1 1700 to 1850 MHz7011156-3 1990 to 2110 MHz7011156-2 2400 to 2500 MHz WARNING: Refer to Appendix A of this manual for information on the properuse of antennas.
DTC COMMUNICATIONS, INC. 21ANTENNASPart Number DescriptionQHA-4 Quadrifilar Helix Antenna with Ring-Hybrid feedConnector: TNC FemaleMust be used with SMA to TNC antenna cable(4045174-006).The QHA family of antennas was developed to provide a compact solution forpattern-tailored circularly polarized antennas. This rugged antenna is omnidirec-tional when the antenna is vertical. The pattern is slightly elevated to allowoverhead coverage. The base of the antenna includes a special flat with #10-32threaded hole, 0.25-in. deep for mounting. It is available in both RHCP andLHCP versions.WARNING: Refer to Appendix A of this manual for information on the properuse of antennas.QHA-4 SpecificationsType Quadrifilar Helix withRing-hybrid feedPolarization CircularPeak Gain 4dBiC at 24° abovehorizonHorizontal Beamwidth OmnidirectionalVertical Beamwidth 46°Nominal Impedance 50 OhmsGroundplane req. Not RequiredSize 8.0” L x 1.25” dia(203 mm x 32 mm dia)Weight 3.7 oz. (105 g)DTC Part Number Frequency RangeQHA-4-2-R 2.4 to 2.5 GHz, RHCPQHA-4-2-L 2.4 to 2.5 GHz, Lhcp
DTC COMMUNICATIONS, INC.22ANTENNASANT-5-PIG 5 dBi Patch Antenna Connector: SMA or TNC Male on18" coax. “pigtail”.DTC 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 alumi-num plate. Typical uses include disguised transmitters and vehicular-mountedtransmitter antennas and in a variety of receive applications.Part Number DescriptionSpecificationsType Patch antenna with integralring hybridPolarization RHCPPeak Gain 5dBicHorizontal Beamwidth 90°Vertical Beamwidth 90°Nominal Impedance 50 OhmsGroundplane Req. Built-inSize 4.0” W x 4.0” H X 0.625” D(102mm x 102mm x 16mm)Weight 6.4 Oz. (180 g)DTC Part Number Frequency RangeANT-5-P-SMA 2.0 to 2.5 Ghz with SMAmale connectorANT-5-P-TNC 2.0 to 2.5 Ghz with TNCwith male connectorWARNING: Refer to Appendix A of this manual for information on the properuse of antennas.Ant-5P
DTC COMMUNICATIONS, INC. 23ANTENNASPart Number DescriptionANT-10 9dBic Wideband Panel Connector: TNC FemaleDTC 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-Ris a very wide bandwidth, unidirectional log-spiral array. This antenna hasuseful gain, with some sidelobe variation, to 4 GHz. It can be mounted to a wallor swivel mounted with the MAF-1 grip on two surfaces, via two pairs of “1/4-20”tapped holes located in the rear center and the bottom center of the aluminumhousing. The front of the antenna is a radome made of a polycarbonatematerial. The antenna is suitable for indoor and short-term outdoor use. It mustbe protected for extended outdoor use and installations since it is not water- SpecificationsType Log-spiral slot array, absorberloadedPolarization RHCPPeak Gain 9dBicHorizontal Beamwidth 30°at 2.0 GHzVertical Beamwidth 30°at 2.0 GHzNominal Impedance 50 OhmsGroundplane Req. Not requiredSize 9” W x 9” H x 1.2” D(227mm x 227 mm x 30 mm)Weight 1.7 lb. (750g)DTC Part Number Frequency Range4044411 1.7 to 2.7 GHz; RHCP7011142 1.7 to 2.7 GHz; RHCP withMAF - 1 grip includedWARNING: Refer to Appendix A of this manual for information on the properuse of antennas.Ant-10
DTC COMMUNICATIONS, INC.24IntroductionDTC has built in a lot of flexibility in the programming options you have on the VBLand VBS series transmitters. You can choose to use some, all or none of thisflexibility.When you order a VBL or VBS transmitter, DTC will factory program your frequen-cies at no additional charge to you. You may want to place a sticker over therotary switch on the chassis, so users in the field don’t attempt to change frequen-cies. This is often the best path for state and local agencies with limited frequen-cies 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 is ideal if you often work with other agencies, or anticipate theequipment being used by a multi-jurisdictional task force. You can program up toten channel settings per unit. In general, this allows you to program most varia-tions you might encounter in the field at the depot level.As a practical matter, your VBL or VBS transmitter’s video frequencies and audiosub-carriers will be dictated by the frequency and sub-carriers(s) of your receiverand/or repeater. In many cases, these devices are crystal controlled or have fewchannel options.TIP: Make sure that you program your transmitter to match the frequenciesand audio sub-carriers or your receiver, and test the components as asystem prior to going into the field! PROGRAMMING
DTC COMMUNICATIONS, INC. 25PROGRAMMINGInstalling DTC Universal Programming Software on your PCNOTE: Uninstall any previous versions by going to Add/Remove Programs,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.Your programming software is installed.
DTC COMMUNICATIONS, INC.26PROGRAMMINGSERIAL PORT OFCOMPUTERCOM1 OR COM21Make sure the video transmitter ON/OFFswitch is set to OFF. The red dot isOFF.2Make sure the transmitter has an antenna installed into the antenna connec-tor prior to programming.3Install the programming cable into the Multi I/O connector on the transmitter.4Plug the serial cable of the programming cableinto the COM1 or COM2 port of your computer.5Turn the transmitter switch to ON. The green dotis ON.6Select Start, programs, DTC communications onyour computer.7The system allows you to select device COM1 orCOM2, depending on which serial port you areconnected to.8Follow the instruc-tions on the DTCUniversal Program-ming screens tobegin the downloadprocess.67823415
DTC COMMUNICATIONS, INC. 2759Click on the “Tx Channel” tab in the programmer screen.10 Select a channel and click on the Edit Channel button to change settings.11 Enter your new frequency and settings.12 To change any of the MIC-2 or MIC-1 settings, click on the settings provided,then click OK.13 Click on the Upload button to upload your new settings to the transmitter.Your new settings have been installed.PROGRAMMING139101211
DTC COMMUNICATIONS, INC.28APPENDIX A Using Antennas with the VBS/VBL-250 Video TransmitterBodyworn applications:When the VBS/VBL-250 video transmitter is to be worn on the body, only the DTCVidiWire antenna system should be used. This antenna has been extensivelytested and found to be safe when used as directed. The antennas used in theVidiWire system are clearly labeled as to which side of the antenna should beplaced against the body. These directions must be observed to insure safe andeffective operation.Non-portable applications:In fixed location applications any suitable antenna may be used. However, toinsure safe operation, it is imperative that proper spacing be maintained betweenthe radiating surface of the antenna and any persons body. The required spacingdepends on the RF output power of the transmitter and the gain of the antennabeing used. The chart below shows the correct minimum spacing for antennasused with the VBS/VBL-250 transmitters. If the gain of the antenna is unknown,contact the manufacturer of the antenna for this information. To insure that properspacing is maintained, locate the transmitter or arrange physical barriers in suchaway that people are prevented from approaching too closely.
DTC COMMUNICATIONS, INC. 29APPENDIX AMinimum Allowable Spacing Between the Antenna and the Human Body(VBS/VBL-250 Video Transmitter)05101520253035400 5 10 15 20 25Antenna Gain (dB)Minimum Spacing (inches)Using Antennas with the VBS/VBL-250 Video Transmitter
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