Manual

FCC ID: H25VXS250

Users Manual

Download: PDF

FCCID_283203

How to contact DTC Copyright Notice Warranty
For operator and troubleshooting Copyright © 2002 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 clarification reserved. No part of this document may be two (2) years, commencing on the date of original pur-
or instruction, or to order parts, contact DTC. reproduced, transmitted, transcribed, stored in a re- chase.
Customer Service is available Monday through trieval system or translated into any Products manufactured by others that are approved
Friday between the hours of 9:00 AM and 5:00 PM language or computer language, in any form or by for use with DTC equipment are warranted for the
EST at: any means, including but not limited to electronic, manufacturer’s warranty period, commencing from the
Tel: 603-880-4411 magnetic, mechanical, optical, chemical, manual or date of shipment from DTC.
Fax: 603-880-6965 otherwise, without the prior written permission of DTC
Website: www.dtccom.com
Email: info@dtccom.com
Communications, Inc. FCC information
The following information is provided as a
Disclaimer service to our law enforcement customers who
486 Amherst Street The information in the document is subject to change require a Part 90 station license for video
Nashua, New Hampshire 03063 without notice. DTC makes no representations or war- surveillance operations using the 2450 to 2483.5 MHz
USA ranties with respect to the contents hereof, and spe- band.
cifically disclaims any implied warranties of merchant- You will need to provide:
ability or fitness for a particular purpose. DTC reserves • Form 600 (the application form)
the right to revise this publication and to make changes
Forms can be obtained from the FCC on their web-
from time to time in the content hereof without obliga-
site at:
tion of DTC to notify any person of such revision or
www.fcc.gov
changes.
You can also contact the FCC using their FAX back
Trademarks service at: (888) 418-3676
Trademarks of DTC Communications, Inc. include: Additional instructions are available by telephone at:
• DTC (888) 225-5322
• MiniPIX® The filing fee form is returned to:
• DynaPIX® Federal Communications Commission
Other product names used in this manual are the prop- 1270 Fairfield Road
erties of their respective owners. Gettysburg, PA 17325-7245

2 DTC COMMUNICATIONS, INC.

Manual Conventions
TABLE OF CONTENTS
NOTE Describes special issues you should be aware of Quick Start ........................................................................... 4
while using a particular function. Overview .............................................................................. 5
Features ............................................................................... 6
WARNING Calls out situations in which equipment
Specifications ....................................................................... 7
could be damaged or a process could be incorrectly
implemented, but in which operator safety is not a Battery Drain ........................................................................ 9
factor. Connectors ......................................................................... 10
Connections ........................................................................ 11
TIP Describes application hints. Equipment Configurations ................................................. 13
Optional Accessories ........................................................ 14
Programming ..................................................................... 22
Appendix A ......................................................................... 26
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.

FCC ID# H25VXS250

DTC COMMUNICATIONS, INC. 3

OVERVIEW
What should you expect to receive with your 250mW
Transmitter?

1 VBS/VBL Video Transmitter NOTE: The dipole antenna included is not recommended for normal
1 Dipole antenna with right angle SMA connector use! This antenna enables you to quickly set up your transmitter
1 One Video and Power In “Y” cable and ensure proper operation. DTC highly recommends the use of
1 DTC programming software package circularly polarized antennas for the best rejection of multi-path.
1 DTC programming cable
8 Batteries 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. 5

FEATURES
Feature Description
Remote Switching Capability • 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.
External Power Loop Through • 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 Volts out. Applying power through
the multi I/O connector automatically disables the internal AA battery pack.

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

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

Camera Power Available through • When powering the device using the internal battery pack, regulated 5 VDC is
Multi I/O Connector available on the multi I/O connector, limited to 200 mA current drain.

6 DTC COMMUNICATIONS, INC.

APPENDIX A Using Antennas with the VBS/VBL-250 Video Transmitter
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. 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.

Non-portable applications:

In 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. The required spacing
depends on the RF output power of the transmitter and the gain of the antenna
being used. The chart below shows the correct minimum spacing for antennas
used 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 proper
spacing is maintained, locate the transmitter or arrange physical barriers in such
away that people are prevented from approaching too closely.

28 DTC COMMUNICATIONS, INC.

Using Antennas with the VBS/VBL-250 Video Transmitter APPENDIX A

Minimum Allowable Spacing Between the Antenna and the Human Body
(VBS/VBL-250 Video Transmitter)

40

35

30
Minimum Spacing (inches)

25

20

15

10

5

0
0 5 10 15 20 25
Antenna Gain (dB)

DTC COMMUNICATIONS, INC. 29

Document Created: 2002-11-11 16:15:58
Document Modified: 2002-11-11 16:15:58

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