Manual

FCC ID: H25VMS2000

Users Manual

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FCCID_320379

     2 Watt
       Watt
      Transmitter
Video Transmitter
Operator Manual
 VMS-2000 Frequency 2450-2500 MHz




           DTC COMMUNICATIONS INCORPORATED   OP1920147 Rev B


How to contact DTC                                  Copyright Notice                                         Warranty
For operator and troubleshooting                    Copyright © 2003                                         DTC warrants its manufactured components against
information, customers are encouraged to refer to   DTC     Communications,        Inc. All       rights     defects in material and workmanship for a period of
the details in this manual. For additional          reserved. No part of this document may be                two (2) years, commencing on the date of original
clarification or instruction, or to order parts,    reproduced, transmitted, transcribed, stored in a re-    purchase.
contact DTC.                                        trieval system or translated into any                    Products manufactured by others that are approved
Customer Service is available Monday through
                                                    language or computer language, in any form or by         for use with DTC equipment are warranted for the
Friday between the hours of 9:00 AM and
                                                    any means, including but not limited to electronic,      manufacturer’s warranty period, commencing from
5:00 PM EST at:
Tel: 603-880-4411                                   magnetic, mechanical, optical, chemical, manual or       the date of shipment from DTC.
Fax: 603-880-6965                                   otherwise, without the prior written permission of
Website: www.dtccom.com                             DTC Communications, Inc.                                 FCC information
Email: info@dtccom.com
                                                    Disclaimer                                               Forms can be obtained from the FCC on their web-
                                                                                                             site at:
                                                    The information in the document is subject to change
                                                                                                                www.fcc.gov
486 Amherst Street                                  without notice. DTC makes no representations or
Nashua, New Hampshire 03063                         warranties with respect to the contents hereof, and      You can also contact the FCC using their FAX back
USA                                                 specifically disclaims any implied warranties of mer-    service at: (888) 418-3676
                                                    chantability or fitness for a particular purpose. DTC    Additional instructions are available by telephone at:
                                                    reserves the right to revise this publication and to     (888) 225-5322
                                                    make changes from time to time in the content hereof     The filing fee form is returned to:
                                                    without obligation of DTC to notify any person of such      Federal Communications Commission
                                                    revision or changes.                                        1270 Fairfield Road
                                                                                                                Gettysburg, PA 17325-7245
                                                    Trademarks
                                                    Trademarks of DTC Communications, Inc. include:
                                                         • DTC
                                                         • MiniPIX®
                                                         • DynaPIX®
                                                    Other product names used in this manual are the
                                                    properties of their respective owners.




2


                                                                                TABLE OF CONTENTS
Manual Conventions                                            Quick Start ........................................................................... 4
                                                              Overview .............................................................................. 5
    NOTE Describes special issues you should be aware of      Specification ......................................................................... 6
     while using a particular function.
                                                              Current Drain and Battery Drain .......................................... 8
    WARNING Calls out situations in which equipment could     Heatsink Information ............................................................ 9
    be damaged or a process could be incorrectly imple-       Connectors ......................................................................... 10
    mented, but in which operator safety is not a factor.
                                                              Connections ........................................................................ 11
    TIP Describes application hints.                          Equipment Configurations ................................................. 12
                                                              Optional Accessories ........................................................ 14
RF EXPOSURE STATEMENT                                         Appendix A ......................................................................... 23
This product is NOT to be used in a bodyworn application.
Refer to Appendix A in this manual for instruction in the     Programming Introduction .................................................. 24
proper use of antennas with this device. When in use a        Installing Programming Software ....................................... 25
separation distance of at least 50 cm. must be maintained     Programming Procedure .................................................... 26
between the antenna and the body of the user or nearby
persons.
                                                              What should you expect to receive with your 2W Transmitter?
    Note: This device is for occupational use only. Occupa-
     tional users are those persons who are exposed as a
     consequence of their employment, provided these          1 VMS Video Transmitter
     persons are fully aware of and exercise control over     1 Dipole antenna with right angle SMA connector
     their exposure.                                          1 DTC programming software package
                                                              1 DTC programming cable
FCC ID# H25VMS2000                                            1 One Video and Power In “Y” cable




                                                                                                                                                      3


    QUICK START
          6           1 Make sure that the power to the transmitter is OFF.
                      2 Using a screwdriver, turn the channel selector to the correct channel number.
                      3 Connect an antenna to the ANTENNA connector on the module.
                      4 Select Hi or Lo Power using the recessed switch.
                      5 Connect the microphone or microphones to the MIC-1 and MIC-2 connectors
     3     5            on the module.
                      6 Connect a video source and external power (11 -16 VDC) to the
                        Video/Multi-I/O connector.
                      7 Apply power to the transmitter

                  4       Warning: Do not apply power to the transmitter until an antenna has been
                          connected in step 3.

                          Warning: Refer to Appendix A of this manual for information on the proper
                          use of antennas.




                  2


                          NOTE: DTC has provided you with a “Y” cable (power and video) terminated
                           with an RCA connector and a BNC adapter for your convenience.

                          NOTE: The dipole antenna included is not recommended for normal use! This
                           antenna enables you to quickly set up your transmitter and ensure proper
                           operation. DTC highly recommends the use of circularly polarized antennas
                           for the best rejection of multi-path.
4


                                                                                                     OVERVIEW
The VMS transmitters are small module transmitters designed for off body applications. They are part of a family of video
transmitters from DTC that provide 250 mW, 2 Watts and 5 Watts output power.

       Feature                             Description

                                           User programmable video channels, selectable in 250 kHz steps. Two
                                           user programmable audio sub carriers, selectable in 10 kHz steps
       Programmable
                                           from 6 MHz to 7.5 MHz.


                                           Audio sub carriers are OFF unless microphones are connected. The
                                           transmitter automatically senses when a microphone has been
                                           connected.
                                           The audio sub carriers are phase locked, and will not drift into the
       Audio Sub-Carriers
                                           video signal.
                                           Automatic Gain Control is provided on each audio input, amplifying
                                           soft sounds.


                                           They generate far less heat than traditional video transmitters.
       Efficient Switching Power Supply    They operate significantly longer than traditional video transmitters on
                                           the same power source.

                                           The power applied to the Multi I/O pin is automatically looped through
                                           the unit, and available on a second pin to power a remote device,
       External Power Loop Through
                                           such as a camera. If you apply 9 Volts in, you will get 9 Volts out, with
                                           a maximum current drain of 200mA

                                           The VMS series supports Ovation Micro ViewLock II™encryption,
       Encryption Options
                                           which adds approximately .35" to the thickness of the unit.
                                                                                                                            5


    SPECIFICATIONS
General Specifications                                          RF Specifications
    ITEM                  SPECIFICATION                         ITEM                               SPECIFICATION

    Power Input Voltage   External 11-16 Vdc                                                       2450-2500 MHz, 250 KHz
                                                                Operating Frequency
                                                                                                   resolution steps
    Power Consumption     7.2 Watts (not including camera)
                                                                                                   2000 mW min. @ nominal
    Reverse Polarity                                                                               supply voltage, 25 Deg. C.
                          YES
    Protection                                                  Power output                       -3db @ 7VDC ext. -2 dB
                                                                                                   over temp.
    Dimensions            3.9 x 2.7 x 0.512”
                                                                                                   2.5W maximum
                          Same as supply voltage going
                                                                Output Impedance                   50 Ohms
    Camera Power          into the transmitter. Current
                          limited to 200 mA.
                                                                Spurs and Harmonics output         -50 dBc
                          10 channel select rotary switch
    Controls              Panel mounted, recessed slide         Load Pull Stability                8:1 VSWR
                          power selection switch
                                                                Frequency Stability                +/- 0.003%, -30 to +50°C
                          2 pin Lemo: Mic 1
                          2 pin Lemo: Mic 2                     Modulation Sensitivity             8 MHz/V nom.
                          SMA: Antenna
    Connectors            6 pin Multi I/O: Video in, Data in,   Modulation Sensitivity Variation   +/- 5% across the band
                          DC input 11-16 Vdc, camera
                          power, Remote ON/OFF,                 Peak Carrier Deviation             4 MHz nom.
                          Multiplexed Data out, Ground
                                                                Number of channels                 10 max. (user programmable)
                          Video: 2450-2500 MHz
                          (VMS-2000)                            Sub-carrier sideband level         -28 dBc, +/- 2 dB
    Programmability       250 KHz resolution steps
                          Audio: User programmable from         Environmental Temperature Range    -30-+70°C
                          6.0-7.5 MHz, in 10 kHz steps
                                                                Humidity                           90% (non-condensing)
                          Machined, solid aluminum with
    Chassis notes
                          rounded edges

6


                                                                                                   SPECIFICATIONS
Audio Specifications                                                    Video Specifications
 ITEM                             SPECIFICATION                         ITEM                         SPECIFICATION

                                  Mic level input (line level factory   Video Frequency Response     BW1.5dB = 6 Hz - 5.0 MHz
                                  opt.) 50-3000 Hz
                                  Phased locked AGC on both             Input Impedance              75 Ohms
 General
                                  inputs. Sub-carrier auto sensing,
                                  only active when microphone is        Input Level                  1Vp-p M
                                  attached.
                                                                        S/N                          60 dB min.
 Number of sub-carriers           2
                                                                        Pre-Emphasis                 Per CCIR 405 525 line curve
 Sub-carrier frequencies          6.0-7.5 MHz , user programmable
                                                                        Differential Gain            5%
                                  Subcarriers are activated when
 Sub-carrier ON/OFF Control
                                  mic is connected.

 Subcarrier Frequency Stability   +/- 0.003%, -30 to +70°C

 Sub-Carrier Deviation            50 kHz peak

 Audio S/N                        45 dB min.

 Frequency Response               BW1.5dB = 50-3000 Hz

 Total Harmonic Distortion        <2%

                                  8 mVpp@400 Hz for 50 kHz peak
 Input Level
                                  dev.

 Pre-Emphasis                     75 uS

 Input Impedance                  10k Ohm




                                                                                                                                   7


    SPECIFICATIONS

                                                       Approximate VMS-2000 Current vs. External Supply Voltage
                                                                         (Camera NOT included)

                                  700


                                  650


                                  600


                                  550
             Current Drain (mA)


                                  500


                                  450


                                  400


                                  350


                                  300


                                  250


                                  200
                                        11               12                  13                      14             15              16
                                                                            External Supply Voltage (Vdc)



                                                                                                                  Transmitter and
                                                                                                   Transmitter
                                        Battery Type                        Part Number                           Camera 12V
                                                                                                   Only
                                                                                                                  @120mA

                                        10 D-Cell Alkaline Pack             4045177                9.5 hours      8 hours




8


        HEATSINK INFORMATION
     Baseplate operating temperature is
11
     -20° to + 80°C. Most applications will
     not require a heatsink. In applications
     where the baseplate temperature will
     exceed +80°, add “-HO” to any
     VMXX-2000 transmitter part number
     for the optional heat sink at no
     additional charge. The drawing on
     the left clearly marks the mounting
     holes for the heatsink installation
     when required. To install the
     heatsink.
               1 Align the mounting holes of the transmitter to the
                 mounting holes on the heatsink.
               2 Secure the heatsink with four (4) 6-32 x 1”
                 screws.




                                                                      9


     CONNECTORS
                                              MATING CONNECTORS

                                               Lemo Male Part # (FFS.01.250.DLAE31)
                                               DTC Male Part # (8570003)

                                               Hirose Part # HR10A-7P-6P (02)
                                               DTC Part # 954020

                                               Standard Male SMA Connector

                                              MICROPHONE CONNECTORS
                                              Two connectors accommodate two microphone inputs. Each
                                              connector has two contacts and provides power to the
                                              microphone as well as connecting the audio signal into the
              Microphone Connectors
                                              transmitter. The audio sub-carriers are activated by the
                                              presence of the microphone. If a microphone is removed,
                                              that sub-carrier is removed from the transmit signal. Turning
                                              off the unused sub-carrier saves power and improves picture
                                              quality.
       Antenna Connector
                                              ANTENNAS
                                              A standard SMA connector is used as the antenna connector
                                              on the VMS-2000. Refer to a list of DTC antennas available
                                              on page 17.
         WARNING: Refer to Appendix A of
         this manual for information on the       TIP: You may use the VMS series transmitters with other
         proper use of antennas.                  manufacturers antennas. Verify that they are suited for
                                                  the band you are operating in.
10


                                                                                           CONNECTIONS
CHANNEL SELECT SWITCH                                                                                        HI/LO Power
Select a transmission channel by using the rotary switch          Channel Select
                                                                                                             Switch
located on the front surface of the transmitter. Use a screw-     Switch
driver to rotate the switch to the desired channel number.

HI/LOW OUTPUT POWER SWITCH
Select Hi or Low power by using the recessed power switch.
Switching to Hi power
is equal to 2 Watt output power. Switching to Low power is
equal to 1/4 Watt output power.

MULTI I/O CONNECTOR
The multi I/O (6-pin Multi I/O) connector is mainly used as the
video and external power input connector. It also provides
access to many transmitter functions, such as:                            Multi I/O Connector
• Programming the device
• Video in
• Power in
• Remote on
• Camera power
                                                                                       Pin 6:
                                                                                       Video in          Pin 1: Ground

                                                                                     Pin 5:              Pin 2: Ext power
                                                                                     RS-232 in           input 11-16VDC
                                                                                                      Pin 3: Camera
                                                                                                      Power Output
                                                                      NOTE: Same as supply voltage. Do
                                                                      not exceed 200 mA.
                                                                                                                         11


     BASIC VIDEO TRANSMITTER
                                                                      The basic VMS-2000 configuration consists of the video
                                                                      transmitter, dipole antenna, and DTC cable part number
                                                                      4045171-024. This cable is connected to the multi I/O port of
                                                             CAMERA   the transmitter.
                                                 CAMERA      POWER
                                                                +     It is configured to supply:
           STRIPPED AND                                               •     The video signal to the transmitter
           TINNED LEADS                                                     from the camera.
           STANDARD
                              POWER SOURCE                            •     Power to the transmitter through a
                              for transmitter only,
                                     9-16 V.                                molex connector that can easily be
                                                                            connected to DTC’s battery packs. It
                                                                            also comes standard with stripped
                                                                            and tinned leads for a customer
                                                                            suppled power source. A few of the
                          B                                                 DTC battery packs are listed below
                                                                            and shown in the illustration:
OPTIONAL
BATTERY                              ANTENNA
PACKS                                                                 A   4045130 (AA Rechargeable)

                                                                      B    4045177 ( D-Cell battery pack)
                               A
                                               TRANSMITTER                 Alkaline

                                                                      The cable does not supply power to the camera. The camera
                                                                      is powered separately with a customer supplied power
                                                                      source. DTC offers other cables that will supply power to the
                                                                      camera as an option.




12


                                                                        SINGLE POWER SOURCE
The VMS-2000 configuration, which uses the loop through
power source for the camera, consists of the video transmitter,
                                                                                                             CAMERA
dipole antenna, and DTC cable part number 405189-024 .
This cable is connected to the multi I/O port of the transmitter.

                                                                        STRIPPED AND                                  INTERNAL LOOP
It is configured to supply:                                                                LOOP THROUGH               CAMERA POWER
                                                                        TINNED LEADS       POWER
•     The video signal to the transmitter                               STANDARD           SOURCE
                                                                                           FOR TX AND CAMERA
      from the camera.                                                                     11-16 VDC
•     Power to the transmitter through a
      molex connector that can be easily
      connected to DTC’s battery packs.
•     Power to the camera through a
      molex connector that can easily be
      connected to DTC’s optional                                                      B
      cameras.
                                                                                                   ANTENNA


    NOTE: You will need external camera power if voltage to
     the transmitter is not compatible with camera’s operat-
     ing voltage, and/or you need greater battery life, and/or      OPTIONAL                   A
     your camera draws more than 200 mA.                            BATTERY                               TRANSMITTER
                                                                    PACKS




                                                                                                                                      13


     COMPONENTS




Part Number      Description                            Part Number      Description                             Part Number      Description
4045171-024      Video In/EXT Power/Cam. Power          4045189-024      Video In/EXT Power/Cam. Power           4045174-006      Antenna Cable 6” standard
                 cable, 24”standard.                                     cable, 24”standard.                     4045174-012      Antenna Cable 12” Option
Specifications                                          Specifications                                           Specifications
Video In:        Multi I/O to RCA(M) with BNC adaptor   Video In:        Multi I/O to RCA(M) with BNC adaptor    Connectors       SMA to TNC
                 (YELLOW)                                                (YELLOW)
Ext. Power:      24 AWG wire with a molex connector     Ext. Power:      24 AWG wire with a molex connector
                 and stripped and tinned leads. (RED)                    and stripped and tinned leads. (RED)
                                                        Camera Power:    24 AWG wire with a molex connector
                                                                         and stripped and tinned leads. (GRAY)


14


                                                                                                      COMPONENTS




Part Number   Description              Part Number   Description                              Part Number             Description
7011145-012   Microphone, 12” length   4045177       D cell battery pack with locking Molex   4045173                 Programming cable
7011145-024   Microphone, 24” length                 Micro-fit Connector                      (Connects from the Multi I/O connector to the DB9 connector)
7011145-036   Microphone, 36” length
                                                                                              This cable plugs into COM1 or COM2, serial ports of a PC. It
7011145-048   Microphone, 48” length
7011145-072   Microphone, 6’ length                                                           allows for the programming of the Video transmitter with the
7011145-144   Microphone 12’ length                                                           DTC Programming software.
7011145-360   Microphone 30’ length




                                                                                                                                                             15


     COMPONENTS
                                                   TO CLOSE:
                                                   PUSH CONNECTORS TOGETHER UNTIL THE
                                                   MOLEX LOCKING MECHANISM CLICKS AND LOCKS




                                                    TO OPEN:
                                                    PUSH THIS TAB DOWN TO RELEASE THE MOLEX
                                                    LOCKING MECHANISM, THEN PULL CONNECTORS
                                                    APART.




Part Number   Description                        Part Number      Description                                Part Number              Description
4045130       AA (13.5 V) Rechargeable battery   8590138          Terminal, Crimp, Female, micro-fit (3.0)   ANT-VIL                 Dipole Antenna 1.70-1.85 GHz with
              pack (NiMH) with Molex Micro-fit                    wire size 20-24 AWG plt gold.                                      right angle SMA adaptor
              Connector                                           Molex Part # 43030-0009                    ANT-VIS                 Dipole Antenna 2.4-2.5 GHz with
                                                 8550104          Receptacle, 2 circuit, micro-fit (3.0)                             right angle SMA adaptor
                                                                  in line. Molex Part # 43645-0200           The ANT-VIL/S is a 1/2 wave coaxial dipole portable duck
                                                 Part Number      Description                                antenna. It can be mounted directly to the video transmitter, or
                                                 8590139          Terminal, Crimp, Male, Micro-fit (3.0)     at a right angle using the adaptor provided.
                                                                  wire size 20-24 AWG plt. gold.
                                                                  Molex Part # 43031-0009
                                                 8550101          Plug, 2 circuit, Micro-fit (3.0)
16                                                                In line. Molex Part # 43640-0200


                                                                                                     ANTENNAS
Part Number            Description
7011129                ANT-2 2dB: Dipole 1.7-1.85 GHz
                       Must be used with SMA to TNC antenna cable
                        (4045174-006).

7011131                ANT-2 2dB: Dipole 2.4-2.5 GHz
                       Must be used with SMA to TNC antenna cable
                        (4045174-006).

ANT-2 is a rugged, lightweight linearly polarized dipole for use in the 2.4 to 2.5   Specifications
GHz and 1.7-1.85 GHz bands. It can be mounted at the end of a cable with a
                                                                                     Type                   Sleeve Dipole
compatible connector. This antenna is ground plane independent.
                                                                                     Polarization           Linear
                                                                                     Peak Gain              2 dBi
                                        ANT-2
                                                                                     Horizontal Beamwidth   Omnidirectional
                                                                                     Vertical Beamwidth     77°
                                                                                     Nominal Impedance      50 Ohms
                                                                                     Groundplane Req.       Not required
                                                                                     Size                   4.0” x 0.75” D
                                                                                                            (101mm x 19 mm)
                                                                                     Weight                 1 oz. (28g)
                                                                                     DTC Part Number        Frequency Range
                                                                                     7011129                1.8 to 1.9 GHz
                                                                                     7011130                2.0 to 2.1 GHz
                                                                                     7011131                2.4 to 2.5 GHz




    WARNING: Refer to Appendix A of this manual for information on the proper
    use of antennas.                                                                                                          17


      ANTENNAS
                                                          Part Number                Description
                                                          ANT-5-PIG                  5 dBi Patch Antenna Connector: SMA or TNC Male on
                                                                                     18" coax. “pigtail”.

                                                          DTC has developed a series of circularly polarized patch antennas for use in the
                                                          2.0 to 2.5 GHz indoor and short term outdoor installations. The ANT-5-P is a 5dbi
                                                          gain, 90 degree wide beamwidth, antenna, mounted on a 0.125 in. thick aluminum
                                                          plate. Typical uses include disguised transmitters and vehicular-mounted transmitter
                                                          antennas and in a variety of receive applications.
     Specifications
     Type                   Patch antenna with integral
                            ring hybrid
                                                                                                ANT-5P
     Polarization           RHCP
     Peak Gain              5dBic
     Horizontal Beamwidth   90°
     Vertical Beamwidth     90°
     Nominal Impedance      50 Ohms
     Groundplane Req.       Built-in
     Size                   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 Range
     ANT-5-P-SMA            2.0 to 2.5 GHz with SMA
                            male connector

     ANT-5-P-TNC            2.0 to 2.5 GHz with TNC
                            with male connector

                                                             WARNING: Refer to Appendix A of this manual for information on the proper
                                                             use of antennas.
18


                                                                                                        ANTENNAS
Part Number                Description
VDAR-1                     Single 5 dBic “Hybrid-Patch”™ Antenna with mounting
                           options. Connector: TNC Female on chassis

The VDAR video antennas are designed to operate with traditional single video
receivers and multiple antenna configurations for diversity receivers. The antenna
uses the DTC Hybrid-Patch™ system to ensure pure circular polarization. This
ensures the highest possible performance in video reception, especially in
diversity systems. It is available in four different bands. Reversible and adjustable
suction cup mounts come standard for quick and easy installation on the inside or       Specifications
outside of window or other hard, smooth surfaces.                                       Type                   Three Hybrid Patch™
                                                                                                               elements
                                       VDAR-1
                                                                                        Polarization           RHCP
                                                                                        Peak Gain              5dBic
                                                                                        Horizontal Beamwidth   90°
                                                                                        Vertical Beamwidth     90°
                                                                                        Nominal Impedance      50 Ohms
                                                                                        Groundplane Req.       Built-in
                                                                                        Size                   6.6” H x 6.6” W
                                                                                                               (167mm x 167 mm)

                                                                                        Weight                 12 Oz. (34g)
                                                                                        DTC Part Number        Frequency Range
                                                                                        7011156-1              1700 to 1850 MHz
                                                                                        7011156-3              1990 to 2110 MHz
                                                                                        7011156-2              2400 to 2500 MHz
                                                                                        7011156-2              2200 to 2300 MHz
   WARNING: Refer to Appendix A of this manual for information on the proper
   use of antennas.
                                                                                                                                     19


      ANTENNAS
                                                              Part Number                Description
                                                              ANT-10                     9dBic Wideband Panel Connector: TNC Female

                                                              DTC has developed a series of circularly polarized panel antennas for use in
                                                              wideband transmit and receive applications from 1.7 to 2.7 GHz. The ANT-10-R is
                                                              a very wide bandwidth, unidirectional log-spiral array. This antenna 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 surfaces, via two pairs of “1/4-20” tapped
                                                              holes located in the rear center and the bottom center of the aluminum housing.
     Specifications
                                                              The front of the antenna is a radome made of a polycarbonate material. The
     Type                   Log-spiral slot array, absorber   antenna is suitable for indoor and short-term outdoor use. It must be protected for
                            loaded
     Polarization           RHCP                              extended outdoor use and installations since it is not waterproof.
     Peak Gain              9dBic
     Horizontal Beamwidth   30°at 2.0 GHz
     Vertical Beamwidth     30°at 2.0 GHz
     Nominal Impedance      50 Ohms
     Groundplane Req.       Not required
     Size                   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 Range
     4044411                1.7 to 2.7 GHz; RHCP

     7011142                1.7 to 2.7 GHz; RHCP with
                            MAF - 1 grip included




                                                                  WARNING: Refer to Appendix A of this manual for information on the proper
20                                                                use of antennas.


                                                                                                       ANTENNAS
Part Number                Description
QHA-4                      Quadrifilar Helix Antenna with Ring-Hybrid feed
                           Connector: TNC Female
                           Must be used with SMA to TNC antenna cable
                           (4045174-006).

The QHA family of antennas was developed to provide a compact solution for
pattern-tailored circularly polarized antennas. This rugged antenna is omnidirec-
tional when the antenna is vertical. The pattern is slightly elevated to allow over-   Specifications
head coverage. The base of the antenna includes a special flat with #10-32             Type                   Quadrifilar Helix with
threaded hole, 0.25-in. deep for mounting. It is available in both RHCP and LHCP                              Ring-hybrid feed
                                                                                       Polarization           Circular
versions.
                                                                                       Peak Gain              4dBiC at 24° above
                                       QHA-4                                                                  horizon
                                                                                       Horizontal Beamwidth   Omnidirectional
                                                                                       Vertical Beamwidth     46°
                                                                                       Nominal Impedance      50 Ohms
                                                                                       Groundplane req.       Not Required
                                                                                       Size                   8.0” L x 1.25” dia
                                                                                                              (203 mm x 32 mm dia)
                                                                                       Weight                 3.7 oz. (105 g)
                                                                                       DTC Part Number        Frequency Range
                                                                                       QHA-4-2-R              2.4 to 2.5 GHz, RHCP
                                                                                       QHA-4-2-L              2.4 to 2.5 GHz, Lhcp
                                                                                       QHA-4-1-R              1.7 to 1.9 GHz, RHCP
                                                                                       QHA-4-1-L              1.7 to 1.9 GHz, LHCP




   WARNING: Refer to Appendix A of this manual for information on the proper use
   of antennas.                                                                                                                        21


      ANTENNAS
                                                              Part Number                Description
                                                              ANT-17-R                   17 dBic Directional Patch Array
                                                                                         Connector TNC Male on 18” coaxial

                                                              DTC developed this very high gain RHCP antenna for the 2.4 to 2.5 GHz band. It
                                                              provides unidirectional broadside coverage. Unlike conventional Yagi antenna,
                                                              this antenna is especially suitable for wall mounting. This panel antenna is useful
                                                              in long-range receive applications, applications in high-multipath environments,
                                                              where it is impractical or impossible to mount a dish antenna.

     Specifications
     Type                   16-patch array with progressive
                            feed
     Polarization           RHCP or LHCP                                                       Ant-17r
     Peak Gain              17 dBic
     Horizontal Beamwidth   16°
     Vertical Beamwidth     16°
     Nominal Impedance      50 Ohms
     Groundplane req.       Not Required
     Dimensions             16.0”W x 14.5”H x 0.125”D
                            (406 mm x 368 mm x 3.2 mm)
     Weight                 47 oz. (1333g)
     DTC Part Number        Frequency Range
     ANT-17-R               2.4 to 2.5 GHz




22


                                                                                  APPENDIX A
Using Antennas with the VMS-2000 Video Transmitter

Any suitable antenna may be used, however to insure safe operation, it is
imperative that proper spacing be maintained between the radiating surface of
the antenna and any persons body. No antenna should be placed closer than 19
inches (48 cm) to the body. To insure that proper spacing is maintained, locate
the transmitter or arrange physical barriers in such away that people are
prevented from approaching too closely.




                                                                                               23


     PROGRAMMING
                   Introduction
                   DTC has built in a lot of flexibility in the programming options you have on the
                   VMS series transmitters. You can choose to use some, all or none of this
                   flexibility.

                   When you order a VMS transmitter, DTC will factory program your frequencies at
                   no additional charge to you. You may want to place a sticker over the rotary switch
                   on the chassis, so users in the field don’t attempt to change frequencies. This is
                   often the best path for state and local agencies with 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 is ideal if you often work with other agencies, or anticipate the
                   equipment being used by a multi-jurisdictional task force. You can program up to
                   ten 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 VMS transmitter’s video frequencies and audio sub-
                   carriers will be dictated by the frequency and sub-carriers(s) of your receiver and/
                   or repeater. In many cases, these devices are crystal controlled or have few
                   channel options.

                       TIP: Make sure that you program your transmitter to match the frequencies
                       and audio sub-carriers or your receiver, and test the components as a
                       system prior to going into the field!



24


                                                                              PROGRAMMING
Installing DTC Universal Programming Software on your PC
     NOTE: Uninstall any previous versions by going to Add/Remove Programs,
      clicking on DTC Universal Programming, and clicking on uninstall.


1    Click on Start, click on run.
2    Click on the Browse button.
3    Click on or find your CD drive.
4    Install the JAVA Runtime Environment Application first (CD provided).
5    Follow the install wizard screens.
6    Install the Universal Programming software next (floppy provided).
7    Click on Start, click on run.
8    Click on the Browse Button.
9    Click on your floppy drive.
10   Double click on the setup.
11   Follow the install wizard screens.

          Your programming software is installed




                                                                                            25


       PROGRAMMING
                                              1   Make sure that the power to the video transmitter is off.
                                              2   Make sure the transmitter has an antenna installed into the antenna connec-
                                  5
                                                  tor prior to programming.
                                              3   Install the programming cable into the Multi I/O connector on the transmitter.
                               AC POWER       4   Plug the serial cable of the programming cable into
           4                                      the COM1 or COM2 port of your computer.
                                              5   Connect the programming cable into a power
      COM1 or COM2                                source.
     Serial port of computer
                                              6   Select Start, programs, DTC communications on
                                                                                                                         6
                                                  your computer.
                                              7   The system allows you to select device COM1 or
                                                  COM2, depending on which serial port you are
                                          3       connected to.
                                              8   Follow the instructions on the DTC Universal
                 2                                Programming screens to begin the download process.                       7


                                                                                                                8




26


                                                                                   PROGRAMMING
9  Click on the “Tx Channel” tab in the programmer screen.                  9
10 Select a channel and click on the Edit Channel button to change settings.                 13
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.                                                       10



                                                        11



                      12




                                                                                                  27


486 Amherst Street • Nashua, New Hampshire 03063 • 603-880- 4411
                         www.dtccom.com



Document Created: 2003-04-14 13:08:00
Document Modified: 2003-04-14 13:08:00

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