DTC Communications VMS2000 User Manual
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Operator ManualOperator Manual
Operator Manual
Operator ManualOperator Manual
Operator ManualOperator Manual
Operator Manual
Operator ManualOperator Manual
VMS-2000 Frequency 2450-2500 MHz
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DTC COMMUNICATIONS INCORPORATED
OP1920147 Rev B
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
Copyright Notice
Copyright © 2003
DTC Communications, Inc. All rights
reserved. No part of this document may be
reproduced, transmitted, transcribed, stored in a retrieval 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 merchantability 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
Forms can be obtained from the FCC on their website 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
2
TABLE OF CONTENTS
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.
RF EXPOSURE STATEMENT
This product is NOT to be used in a bodyworn application.
Refer to Appendix A in this manual for instruction in the
proper use of antennas with this device. When in use a
separation distance of at least 50 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 users 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.
FCC ID# H25VMS2000
Quick Start ........................................................................... 4
Overview .............................................................................. 5
Specification......................................................................... 6
Current Drain and Battery Drain .......................................... 8
Heatsink Information ............................................................ 9
Connectors......................................................................... 10
Connections ........................................................................11
Equipment Configurations ................................................. 12
Optional Accessories ........................................................ 14
Appendix A ......................................................................... 23
Programming Introduction.................................................. 24
Installing Programming Software ....................................... 25
Programming Procedure.................................................... 26
What should you expect to receive with your 2W Transmitter?
1 VMS Video Transmitter
1 Dipole antenna with right angle SMA connector
1 DTC programming software package
1 DTC programming cable
1 One Video and Power In “Y” cable
3
QUICK START
6
3
5
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
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
Programmable
Audio Sub-Carriers
Efficient Switching Power Supply
External Power Loop Through
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 connected. The
transmitter automatically senses when a microphone has been
connected.
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 traditional video transmitters.
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,
such as a camera. If you apply 9 Volts in, you will get 9 Volts out, with
a maximum current drain of 200mA
Encryption Options
The VMS series supports Ovation Micro ViewLock II™encryption,
which adds approximately .35" to the thickness of the unit.
5
SPECIFICATIONS
General Specifications
ITEM SPECIFICATION
Power Input Voltage External 11-16 Vdc
Power Consumption 7.2 Watts (not including camera)
Reverse Po lari ty
Protection
Dimensions 3.9 x 2.7 x 0.512”
Camera Power
Controls
Co nnecto rs
Programmability
Chassis notes
YE S
Same as supply voltage going
into the tra nsmitte r. Current
limited to 200 mA.
10 channel select rotary switch
Panel mounted, recessed slide
power selection switch
2 pin Lemo: Mic 1
2 pin Lemo: Mic 2
SMA: Antenna
6 pi n Multi I/O: Vid eo in, Da ta in,
DC input 11-16 Vdc, camera
powe r, Remote ON/OFF,
Multiple xed D ata out, Ground
Video: 2450-2500 MHz
(VMS-2000)
250 KHz resolution steps
Audio: User programmable from
6.0-7.5 MHz, in 10 kHz steps
Machi ned, so li d alumi num wi th
rounded edges
RF Specifications
ITEM SPECIFICATION
Operating Frequency
Power output
Output Impedance 50 Ohms
Spurs and Harmonics output -50 dBc
Load Pull Stability 8:1 VSWR
Frequency Stability +/- 0.003%, -30 to +50°C
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-+70°C
Humidity 90% (non-condensing)
2450-2500 MHz, 250 KHz
resolution steps
20 00 mW min. @ no mi na l
supply voltage, 25 Deg. C.
-3db @ 7VDC ext. -2 dB
over temp.
2.5W maximum
6
SPECIFICATIONS
Audio Specifications
ITEM SPECIFICATION
Mic level i nput (line level factory
opt.) 50-3000 Hz
General
Number of sub-carriers 2
Sub-carrier frequencies 6.0-7.5 MHz , user programmable
Sub-carrier ON/OFF Control
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%
Input Level
Pre-Emphasis 75 uS
Input Impedance 10k Ohm
Phased locked AGC on both
inputs. Sub-carrier auto se nsing,
only active when microphone is
attached.
Subcarriers are activated when
mic is connected.
8 mVpp@400 Hz for 50 kHz peak
dev.
Video Specifications
ITEM SPECIFICATION
Video Frequency Response BW1.5dB = 6 Hz - 5.0 MHz
Input Impedance 75 Ohms
Input Level 1Vp-p M
S/N 60 dB min.
Pre-Emphasis Per CCIR 405 525 line curve
Differential Gain 5%
7
SPECIFICATIONS
Approximate VMS-2000 Current vs. External Supply Voltage
700
650
600
550
500
450
400
Current Drain (mA)
350
300
250
200
11 12 13 14 15 16
Battery Type Part Number
(Camera NOT included)
External Supply Voltage (Vdc)
Transmitter
Only
Transmitter and
Camera 12V
@120mA
10 D-C ell A lkali ne Pac k 40 45 177 9.5 ho urs 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
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