DTC Communications VXS250 Video Transmitter User Manual FCC Bodyworn

DTC Communications Inc. Video Transmitter FCC Bodyworn

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DTC COMMUNICATIONS INCORPORATED PN OP1920256 REV A

VBS2-250 Frequency 2200 - 2300 MHz

VBS-250 Frequency 2400-2500 MHz

VBL-250 Frequency 1700-1850 MHz

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ManualManual

Manual

DTC COMMUNICATIONS, INC.

How to contact DTC

For operator and troubleshooting

information, customers are encouraged to refer to

the details in this manual. For additional

clarification or instruction, or to order parts, contact

DTC.

Customer Service is available Monday through

Friday between the hours of 9:00 AM and 5:00 PM

EST at:

Tel: 603-880-4411

Fax: 603-880-6965

Website: www.dtccom.com

Email: info@dtccom.com

486 Amherst Street

Nashua, New Hampshire 03063

USA

DTC Communications, Inc. All rights

reserved. No part of this document may be

reproduced, transmitted, transcribed, stored in a re-

trieval system or translated into any

language or computer language, in any form or by

any means, including but not limited to electronic,

magnetic, mechanical, optical, chemical, manual or

otherwise, without the prior written permission of DTC

Communications, Inc.

Disclaimer

The information in the document is subject to change

without notice. DTC makes no representations or

warranties with respect to the contents hereof, and

specifically disclaims any implied warranties of mer-

chantability or fitness for a particular purpose. DTC

reserves the right to revise this publication and to

make changes from time to time in the content hereof

without obligation of DTC to notify any person of such

revision or changes.

Trademarks

Trademarks of DTC Communications, Inc. include:

• DTC

• MiniPIX®

• DynaPIX®

Other product names used in this manual are the

properties of their respective owners.

Warranty

DTC warrants its manufactured components against

defects in material and workmanship for a period of

two (2) years, commencing on the date of original

purchase.

Products manufactured by others that are approved

for use with DTC equipment are warranted for the

manufacturer’s warranty period, commencing from

the date of shipment from DTC.

FCC information

The following information is provided as a

service to our law enforcement customers who

require a Part 90 station license for video

surveillance operations using the 2450 to 2483.5

MHz band.

You will need to provide:

• Form 600 (the application form)

Forms can be obtained from the FCC on their web-

site at:

www.fcc.gov

You can also contact the FCC using their FAX back

service at: (888) 418-3676

Additional instructions are available by telephone at:

(888) 225-5322

The filing fee form is returned to:

Federal Communications Commission

1270 Fairfield Road

Gettysburg, PA 17325-7245

DTC COMMUNICATIONS, INC. 3

Manual Conventions

NOTE Describes special issues you should be aware of

while using a particular function.

WARNING Calls out situations in which equipment

could be damaged or a process could be incorrectly

implemented, but in which operator safety is not a

factor.

TIP Describes application hints.

TABLE OF CONTENTS

RF EXPOSURE STATEMENT

When used as directed, the maximum SAR of this device is

2.7 W/kg, which meets the limits set forth by the FCC. Refer

to Appendix A in this manual for instruction in the proper use

of antennas with this device. When used in non-portable

aplications, a separation distance of at least 20 cm. must be

maintained between the antenna and the body of the user or

nearby persons.

Note: This device is for occupational use only. Occupa-

tional user are those persons who are exposed as a

consequence of their employment provided these

persons are fully aware of and exercise control over

their exposure.

Quick Start ........................................................................... 4

Overview .............................................................................. 5

Features ............................................................................... 6

Specifications ....................................................................... 7

Battery Drain ........................................................................ 9

Connectors......................................................................... 10

Connections ........................................................................11

Equipment Configurations ................................................. 12

Optional Accessories ........................................................ 16

Programming...................................................................... 26

Appendix A ......................................................................... 30

FCC ID# H25VXS250

DTC COMMUNICATIONS, INC.

QUICK START GUIDE

1Make 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 transmission

channel number.

4Connect an antenna to the ANTENNA connector on the module.

5Connect the microphone or microphones to the MIC-1 and MIC-2 connectors

on 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 to

the transmitter.

Note: While installing the batteries, observe proper polarity as printed in the

battery compartment. Reverse polarity protection is a built-in design feature

of the transmitter. If a battery is installed backwards, this feature prevents the

transmitter from powering up, without damaging the transmitter or battery.

Warning: Do not apply power to the transmitter until an antenna has been

connected in step 4.

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

use of antennas.

57 1

DTC COMMUNICATIONS, INC. 5

OVERVIEW

What should you expect to receive with your 250mW

Transmitter. Some of these components may be

optional.

1 VBS/VBL Video Transmitter

1 Dipole antenna with right angle SMA connector

1 One Video, Power in, and camera power cable

1 DTC programming software package

1 DTC programming cable

8 Batteries

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.

NOTE: DTC has provided you with a “Y” cable (power and video)

terminated with an RCA connector and a BNC adapter for your

convenience.)

The VBL/VBS series video transmitters from DTC represent the first true “video body wires” available. DTC has developed a

fully 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 the

transmitters with miniature board cameras is exceptionally easy, and in the case of 5 volt cameras, power may be provided to

the 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.

FEATURES

Remote Switching Capability

External Power Loop Through

Programmable

Audio

Efficient Switching Power Supply

Camera Power Available thromugh

Multi I/O Connector

•You may turn the device ON remotely, by attaching a switch to one

of the pins on the Multi I/O connector. DTC provides hard-wired and wireless

switches for this application.

• 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, such as a

camera. If you apply 9 Volts in, you will get 9 -.05 (8.5) Volts out.

Note: If internal batteries are used at the same time external power is used, the

batteries will continue to supply some of the transmitter’s’ power, resulting in

continued dischare of the batteries.

WARNING: Make sure your camera will operate on the voltage being supplied

to the transmitter.

User programmable video channels, selectable in 250 kHz steps. Two user

programmable audio sub carriers, selectable in 10 kHz steps from 6 MHz to

7.5 MHz.

• Audio sub carriers are OFF unless microphones are attached. The

transmitter automatically senses when a microphone has been attached.

• The audio sub carriers are phase locked, and will not drift into the video

signal.

• Automatic Gain Control is provided on each audio input, amplifying soft

sounds.

• They generate far less heat than a traditional video transmitters.

• They operate significantly longer than traditional video transmitters on the

same power source.

• When powering the device using the internal battery pack, regulated 5 VDC is

available on the multi I/O connector, limited to 200 mA current drain.

Feature Description

DTC COMMUNICATIONS, INC. 7

SPECIFICATIONS

Specifications for the body worn VBS/VBL-250

Power Supply Internal batteries 4 “AA” batteries or external 9-16 VDC.

Power Consumption 2.5 Watts (not including camera)

Battery life 3 hours - Minimum AA batteries

Reverse polarity

protection Yes

Dimensions 2.5 x 4.5 x 0.675”

Camera Power Using external power input:

Same as supply voltage -0.5 Vdc switched (200 mA max)

Using internal batteries:

5 VDC @ 175 mA, switched (internal regulator)

Controls 10 channel select rotary switch

Panel mounted, slide ON/OFF switch

Connectors 2 pin Lemo: Mic 1

2 pin Lemo: Mic 2

SMA: Antenna

6 pin Multi I/O: Video in, Data in, DC input 9 -16 VDC,

camera power, Remote ON/OFF, Multiplexed Data out,

Ground

Programmability Video: 2400 - 2500 MHz (VBS-250)

1700 - 1850 MHz (VBL-250)

250 KHz resolution steps

Audio: User programmable from 6.0 - 7.5 MHz, in

10 kHz steps

Chassis notes Machined solid aluminum with rounded edges.

Audio

General Mic level input (line level factory opt.) 50 - 3000 Hz

Phased locked with AGC on both inputs. Sub-carrier auto

sensing, only active when microphone is attached.

Number of sub-carriers 2

Sub-carriers frequencies 6.0 - 7.5 MHz , user programmable Four lithium “AA” batteries

FRONT PATCH

ANTENNA

BACK PATCH

ANTENNA

SPLITTER

CAMERA

MICROPHONES

TRANSMITTER

DTC COMMUNICATIONS, INC.

SPECIFICATIONS Sub-carrier ON/OFF control Subcarriers are activated when mic is connected.

Subcarrier frequency stability +/- 0.003%, -30°C 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%

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

Pre-Emphasis 75 uS

Input Impedance 10 k Ohm

Video

Video Frequency

Response BW1.5dB = 6 Hz - 5.0 MHz

Input Impedance 75 Ohms

Input Level 1Vp-p Max.

S/N 60 dB min.

Pre-Emphasis Per CCIR 405 525 line curve

Differential Gain 5%

Operating Frequency 1700 - 1850 MHz, 250 KHz resolution steps

2400 - 2500 MHz, 250 KHz resolution steps

Power output 250 mW min. @ nominal supply voltage, 25 Deg. C.

-3 dB @ 3.6 VDC int

-2 dB over temp.

Output Impedance 50 Ohms

Spurs and Harmonics output -50 dBc

Load Pull Stability 8:1 VSWR

Frequency Stability +/- 0.003%, -30°C to +50°C

DTC COMMUNICATIONS, INC. 9

SPECIFICATIONS

Four lithium batteries

Transmitter & Camera

Internal Battery Type Part Number Transmitter Only Camera 5V@200mA

4 AA Alkaline 8030001 4 hours Not recommended

(Internal)

4 AA Lithium 8030030 6 hours 4 hours

(Internal)

External Battery Type Part Number Transmitter Only Camera 12V@150mA

9 AA Alkaline Pack 4045131 6 hours 4 hours

(External)

9 AA Lithium 4045132 9 hours 6 hours

(External)

9 AA NiMH 4045130 7 hours 4 hours

Rechargeable

(External)

10 D Cell Battery 4045177 55 hours 25 hours

pack Alkaline

Estimated Battery Life:

Modulation Sensitivity 8 MHz/V nom.

Modulation Sensitivity

Variation +/- 5% across the band

Peak Carrier Deviation 4 MHz nom.

Number of channels 10 max. (user programmable)

Sub-carrier sideband level -28 dBc, +/- 2 dB

Environmental

Temperature Range -30°C - +70°C

Humidity 90% (non-condensing)

DTC COMMUNICATIONS, INC.

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 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.

CONNECTORS

Microphone Connectors

Standard Male SMA connector

MATING CONNECTORS

Lemo Male Part # (FFS.01.250.DLAE31)

DTC Male Part # (8570003)

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

DTC Part # 954020

DTC COMMUNICATIONS, INC. 11

ANTENNAS

A standard SMA connector is used as the antenna connector on both the

VBS/VBL-250.

TIP: You may use the VBS/VBL series transmitters with other manufacturers

antennas. 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

use of antennas.

CHASSIS MOUNTED POWER ON/OFF SWITCH

A 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

the chassis mounted power switch is set to OFF, REMOTE ON can be used

to turn the transmitter ON.)

CHANNEL SELECT SWITCH

Select a transmission channel by using the rotary switch located on the front

surface of the transmitter. Use a screwdriver to rotate the switch to the desired

channel number.

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:

• Programming the device

• Video in

• Power in

• Remote on

• Camera power

CONNECTIONS

On/OFF

Switch

Antenna Connector

Multi I/O Connector

NOTE: When using the external

power: camera power = external

power -0.5 Vdc.

When using internal batteries: camera

power = 5 Vdc.

Pin 3: Camera

Power Output

Pin 1: Ground

Pin 2: Ext power

input 9-16VDC

Pin 6: Video in

Pin 5: RS-232 in

Pin 4: Remote on,

switched to ground

multiplexed RS-232 out

Channel

Select

DTC COMMUNICATIONS, INC.

TRANSMITTER

SPLITTER

CAMERA

FRONT PATCH

ANTENNA

BACK PATCH

ANTENNA

MICROPHONE

EXTERNAL

CAMERA POWER

EXTERNAL CAMERA POWER The basic VBS/VBL-250 configuration

consists of the video transmitter, Vidi-Wire

Antenna, and DTC cable part number

4045170-024. This cable is connected to the

multi I/O port of the transmitter, and is

configured to supply:

• The video signal from the camera to the

transmitter.

Cable 4045170-024

DTC COMMUNICATIONS, INC. 13

The basic VBS/VBL-250 configuration consists

of the video transmitter, Vidi-Wire Antenna, and

DTC cable part number 4045194-024. This

cable is connected to the multi I/O port of the

transmitter, and is configured to supply:

• The video signal from the camera to the

transmitter.

• Power (5 Vdc) to the camera through the

internal battery pack.

This configuration allows the internal battery

pack to supply the power to the camera and

the transmitter. It does not depend on supple-

mental battery packs to supply power to any of

its components.

FRONT PATCH

ANTENNA

BACK PATCH

ANTENNA

SPLITTER

CAMERA

MICROPHONES

TRANSMITTER

Cable 4045194-024

INTERNAL CAMERA POWER

DTC COMMUNICATIONS, INC.

ADDING EXTERNAL POWER The VMS/VML-250 configuration, which uses

the loop through power source for the camera,

consists of the video transmitter and DTC cable

part number 4045189-024 . This cable is

connected to the multi I/O port of the transmit-

ter.

It is configured to supply:

• The video signal to the transmitter

from the camera.

• Power to the transmitter through a

molex connector that can be easily

connected to DTC’s battery packs.

• Power to the camera through the internal

power loop through.

This configuration allows for additonal battery

capacity from connnecting DTC’s supplemental

battery packs to the body worn transmitter. The

cable 4045189-024 allows for this configura-

tion.

DTC Optional Battery Packs

A4045131 (AA non-rechargeable, 13.5 V)

B4045177( D-Cell battery pack, 15 V)

Alkaline

C4045130 (AA rechargeable, 13.5 V)

MiMH

CAMERA

ANTENNA

POWER SOURCE

for transmitter and

camera via loop

through 9-16 V.

STRIPPED AND

TINNED LEADS

STANDARD

OPTIONAL

BATTERY

PACKS

TRANSMITTER

MICROPHONES

Cable 4045189-024

Note: Optional battery packs are not to be

used in body worn applications. Use only

internal batteries when the transmitter is

to be worn on the body.

DTC COMMUNICATIONS, INC. 15

This configuration consists of the video transmit-

ter, Vidi-Wire antenna, and DTC cable part

number 4045192-024. This cable is connected to

the multi/IO port of the transmitter, and is config-

ured to supply:

• The video signal from the camera to the

transmitter.

• Power (5 V) to the camera through the

internal battery pack.

• Remote on function through a hard wired

switch or remote Key FOB transmitter. This

remote on function overrides the OFF switch

located on the transmitter chassis.

The Remote On function allows you to turn the

transmitter on from a remote location. The Remote

On function overides the OFF switch on the

transmitter.

FRONT PATCH

ANTENNA

BACK PATCH

ANTENNA

SPLITTER

CAMERA

MICROPHONES

TRANSMITTER

HARD WIRED

SWITCH

KEY FOB

SWITCH

RECEIVER

KEY FOB

SWITCH

TRANSMITTER

STRIPPED AND

TINNED LEADS

STANDARD

TO OPEN:

PUSH THIS TAB DOWN TO RELEASE THE MOLEX

LOCKING MECHANISM, THEN PULL CONNECTORS

APART.

TO CLOSE:

PUSH CONNECTORS TOGETHER UNTIL THE

MOLEX LOCKING MECHANISM CLICKS AND LOCKS

Cable 4045192-024

ADDING REMOTE ON FUNCTION

DTC COMMUNICATIONS, INC.

ACCESSORIES Part NumberPart Number

Part NumberPart Number

Part Number DescriptionDescription

DescriptionDescription

Description

1088185 VidiVest™

The VidiVest™ is designed to be used in conjunction with DTC’s body worn video

transmitter. The vest supplies compartments for the video transmitter, associated

wiring, antenna system (i.e. VidiWire™), microphones, and a button camera. The

garment is ventilated for comfort and can be adjusted with velcro straps at the

waist and shoulders. The vest is intended to be worn as an undergarment with a

loose fitting shirt or other garment over the vest.

4045181 Camera with 3-pin connector

Assembly

This camera is a high-resolution color CCD type, which has been modified to look

like a shirt button. This allows for easy concealment through a regular button

hole.

4045192-024 VidiVest cable harness

This cable harness connects all of the components, such as, the transmitter,

camera, and remote on.

DTC COMMUNICATIONS, INC. 17

Part NumberPart Number

Part Number DescriptionDescription

DescriptionDescription

Description

VW-ANT-2-SMA VidiWire antenna system 2.4-2.5 GHz

VW-ANT-1-SMA VidiWire antenna system 1.7-1.9 GHz

The VidiWire™ antenna system was specifically designed for video transmission

from on-body transmitters. This DTC Proprietary system provides the best

possible omnidirectional video transmission from a body-worn system. The

system is composed of three parts: two special patch-type antennas, and a

phasing module.

WARNING: VidiWire Antennas are housed in a milled aluminum cover which

shields the wearer from RF energy. Make sure the antennas radiating side is

directed away from the body.

WARNING: Do not use the VidiWire antenna system on the body with any

transmitter outputting more than 250mW of RF energy.

ACCESSORIES

WARNING: Refer to Appendix A of this manual for information on the proper

use of antennas.

Specifications

Type DTC proprietary

VidiWire™ design

Polarization Dual Polarized

Peak Gain Pseudo-Isotropic

Horizontal Beamwidth Omnidirectional

Vertical Beamwidth Omnidirectional

Nominal Impedance 50 Ohms

Groundplane

Requirements Not applicable

Size 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 6oz

VW-ANT-2-SMA 2.4 to 2.5 GHz SMA male

connector

VW-ANT-2-TNC 2.4 to 2.5 GHz TNC male

connector

VW-ANT-1-SMA 1.7 to 1.9 GHz SMA male

connector

DTC COMMUNICATIONS, INC.

ACCESSORIES Part NumberPart Number

Part NumberPart Number

Part Number DescriptionDescription

DescriptionDescription

Description

4045170-024 Video In, 24”standard.

Video In: Multi I/O to RCA(M) with BNC

adaptor. (YELLOW)

4045193-024 Video In/Remote On, 24”standard.

Video In: Multi I/O to RCA(M) with BNC

adaptor. (YELLOW)

Remote On: 24 AWG wire with a molex

connector 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 BNC

adaptor. (YELLOW)

Ext. Power: 24 AWG wire with a molex connector

and stripped and tinned leads. (RED)

Camera Power:24 AWG wire with a molex

connector and stripped and tinned leads.(GRAY)

DTC COMMUNICATIONS, INC. 19

ACCESSORIES

Part NumberPart Number

Part Number DescriptionDescription

DescriptionDescription

Description

4045194-024 Video In/Camera Power, 24”standard.

Video In: Multi I/O to RCA(M) with BNC

adaptor. (YELLOW)

Camera Power: 24 AWG wire with a molex

connector 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 BNC

adaptor. (YELLOW)

Camera Power: 24 AWG wire with a molex

connector and stripped and tinned leads.(GRAY)

Remote On: 24 AWG wire with a molex

connector and stripped and tinned leads. (GREEN)

DTC COMMUNICATIONS, INC.

COMPONENTS Part NumberPart Number

Part NumberPart Number

Part Number DescriptionDescription

DescriptionDescription

Description

4045173 Programming cable (Connects from the Multi I/O

connector to the DB9 connector)

This cable plugs into COM1 or COM2, serial ports of a

PC. It allows for the programming of the Video trans-

mitter with the DTC Programming software.

4045174-006 Antenna cable, SMA to TNC, 6”standard length

4045174-012 Antenna cable, SMA to TNC, 12”

7011145-012 Microphone, 12” length

7011145-024 Microphone, 24” length

7011145-036 Microphone, 36” length

7011145-048 Microphone, 48” length

7011145-072 Microphone, 6’ length

7011145-144 Microphone 12’ length

7011145-360 Microphone 30’ length

4045177 D cell battery pack with locking Molex Micro-fit

Connector

Note: Optional battery packs are not to be used in body worn applications.

Use only internal batteries when the transmitter is to be worn on the body.

DTC COMMUNICATIONS, INC. 21

COMPONENTS

TO OPEN:

PUSH THIS TAB DOWN TO RELEASE THE MOLEX

LOCKING MECHANISM, THEN PULL CONNECTORS

APART.

TO CLOSE:

PUSH CONNECTORS TOGETHER UNTIL THE

MOLEX LOCKING MECHANISM CLICKS AND LOCKS

Part NumberPart Number

Part Number DescriptionDescription

DescriptionDescription

Description

4045131 AA (13.5 V) Non-rechargeable Battery Pack with

Molex Micro-fit Connector

4045130 AA (13.5 V) Rechargeable battery pack (NiMH) with

Molex Micro-fit Connector

8590138 Terminal, Crimp, Female, micro-fit (3.0)

wire size 20-24 AWG plt gold.

Molex Part # 43030-0009

8550104 Receptacle, 2 circuit, micro-fit (3.0)

in line. Molex Part # 43645-0200

8590139 Terminal, Crimp, Male, Micro-fit (3.0)

wire size 20-24 AWG plt. gold.

Molex Part # 43031-0009

8550101 Plug, 2 circuit, Micro-fit (3.0)

Inline. Molex Part # 43640-0200

Note: Optional battery packs are not to be used in body worn applications.

Use only internal batteries when the transmitter is to be worn on the body.

DTC COMMUNICATIONS, INC.

ANTENNAS Part NumberPart Number

Part NumberPart Number

Part Number DescriptionDescription

DescriptionDescription

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 high purity circular polarization. This

ensures the highest possible performance in video reception, especially in

diversity systems. It is available in three different bands. Reversible and adjust-

able suction cup mounts come standard for quick and easy installation on the

inside or outside of window or other hard, smooth surfaces.

VDAR-1

WARNING: Refer to Appendix A of this manual for information on the proper

use of antennas.

Specifications

Type Three Hybrid Patch™

elements

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

DTC COMMUNICATIONS, INC. 23

ANTENNAS

Part NumberPart Number

Part Number DescriptionDescription

DescriptionDescription

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

overhead coverage. The base of the antenna includes a special flat with #10-32

threaded hole, 0.25-in. deep for mounting. It is available in both RHCP and LHCP

versions.

WARNING: Refer to Appendix A of this manual for information on the proper

use of antennas.

QHA-4 Specifications

Type Quadrifilar Helix with

Ring-hybrid feed

Polarization Circular

Peak Gain 4dBiC at 24° above

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

DTC COMMUNICATIONS, INC.

ANTENNAS Part NumberPart Number

Part NumberPart Number

Part Number DescriptionDescription

DescriptionDescription

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 transmit-

ter antennas and in a variety of receive applications.

WARNING: Refer to Appendix A of this manual for information on the proper

use of antennas.

Ant-5P

Specifications

Type Patch antenna with integral

ring hybrid

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

DTC COMMUNICATIONS, INC. 25

ANTENNAS

Part NumberPart Number

Part Number DescriptionDescription

DescriptionDescription

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.

The front of the antenna is a radome made of a polycarbonate material. The

antenna is suitable for indoor and short-term outdoor use. It must be protected for

extended outdoor use and installations since it is not waterproof.

WARNING: Refer to Appendix A of this manual for information on the proper

use of antennas.

Ant-10

Specifications

Type Log-spiral slot array, absorber

loaded

Polarization RHCP

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

DTC COMMUNICATIONS, INC.

Introduction

DTC has built in a lot of flexibility in the programming options you have on the VBL

and VBS series transmitters. You can choose to use some, all or none of this

flexibility.

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 the

rotary 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 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 VBL or VBS 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!

PROGRAMMING

DTC COMMUNICATIONS, INC. 27

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.

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.

PROGRAMMING

SERIAL PORT OF

COMPUTER

COM1 OR COM2

AC POWER

ADAPTER

1Make sure the video transmitter ON/OFFswitch is set to OFF. The red dot is

OFF.

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 cable

into the COM1 or COM2 port of your computer

and plug in the AC adapter.

5Turn the transmitter 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

on which serial port

you are connected

to.

8Follow the instruc-

tions on the DTC

Universal Program-

ming screens to

begin the download

process.

DTC COMMUNICATIONS, INC. 29

9Click 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.

PROGRAMMING

DTC COMMUNICATIONS, INC.

Using Antennas with the VBS/VBL-250 Video Transmitter

APPENDIX A

Bodyworn applications:

When the VBS/VBL-250 video transmitter is to be worn on the body,

only the DTC VidiWire antenna system should be used to insure that appropriate RF

exposure levels are not exceeded. This antenna has been extensively tested and

found to be safe when used as directed. The antennas used in the VidiWire system

are clearly labeled as to which side of the antenna should be placed against the

body. These directions must be observed to insure safe and effective operation. In

addition, there are steps that the user may take to further reduce their RF exposure.

Turning the transmitter OFF when it is not needed will reduce the actual time that the

user is exposed to the RF signal. For optimum performance, keep arms, hands, etc.

away from the side of the antenna that faces away from the body.

Non-portable applications:

In mobile or fixed location applications, 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.

Except as described above for bodyworn applications, no antenna should be placed

closer than 8 inches (20 cm) to the body. To insure that proper spacing is main-

tained, locate the transmitter or arrange physical barriers in such away that people

are prevented from approaching too closely.

486 Amherst Street • Nashua, New Hampshire 03063 • 603-880- 4411

DTC Communications VXS250 Video Transmitter User Manual FCC Bodyworn

DTC Communications Inc. Video Transmitter FCC Bodyworn

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