H25T2001S
DTC COMMUNICATIONS, INC.
Operating Instructions for the T2001-S
Personal Protection Transmitter
Version 1.0
OP19200XX
T2001S Operating Instructions page 1
©2000 DTC Communications, Inc.
MODEL T-2001S TRANSMITTER
OPERATING INSTRUCTIONS
Contents
1 T-2001S Transmitter
6 Duracell AAA Batteries
1 MA-70-5 Microphone-Antenna Assy.
1 Data Sheet
1 Operating Instructions
Description
H25T2001S
The T2001S is a synthesized VHF 1Watt audio transmitter, compliant with the NTIA
specification for Narrowband operation. Via a simple PC programming interface, as
many as 10 channels over the entire 150 to 174 MHz band may be installed in memory.
This transmitter is miniaturized and ru ggedized, being designed for body worn personal
prot ect ion and eviden ce gathe ring miss ions. The time to half powe r wit h AAA Alka line
batteries is greater than 4 hours. The transmission is a narrow-band FM signal, of 2.5 kHz
deviation. The T2001-S transmission is duplexed on the microphone cable; meaning the
microphone is the antenna. The audio circuitry is built around a DTC proprietary gain
control (AGC) circuit, and a high-quality Knowles microphone.
Operation
1. Controls
ON – GREEN
OFF - RED
Channel Select - 10 Position Rotary
2. Programmed Features
Channel Frequency - 1 thru 10
AGC - ON / OFF
3. Connectors
Microphone/Antenna
Programming Connector
T2001S Operating Instructions page 2
©2000 DTC Communications, Inc.
H25T2001S
4. Deployment
For longest transmission range, use with microphone-antenna fully extende d in a
vertical orientation.
Batteries
The T-2000-S operates on six AAA batteries in series, which produce 9 VDC. A fresh set
of batte ries will operate t he unit for over four hours. Battery reversal guards are integral
to the battery compartment to eliminate the possibility of cell reversal.
Verify that the microphone antenna is inserted and the unit is switched off (RED DOT).
To install the batteries:
1. Lay the unit down, battery side up and slide the battery door to the right.
2. Observing polarity, install the six alkaline AAA cells.
3. Close the battery door by sliding the door to the left.
NOTE: Do not operate the transmitter without the microphone antenna attached
Transmitter Operation
1. Slide the battery door to the right and install six fresh AAA batteries, being careful to
observe polarity. Replace the door by sliding it to the left. Verify that the power
switch located on the top control surface is in the RED “off” position. Attach the
Microphone to the connector on the top of the unit. This is a push-on pull-off lockingtype connector. Connect the microphone antenna to the transmitter by simply pushing
it into the top connector.
This is a push-on push-off locking connector. The connector will rotate 360 degrees in the
transmitter without unmating. Use extreme caution when connecting or removing the
microphone antenna. To remove slide back the sleeve, and pull straight out.
2. Set the T-2001 to the proper channel using the recessed rotary switch located on the
front cover.
3. Turn the unit “on” by sliding the switch to the GREEN position.
4. Always turn the unit off and remove used batteries when not in use. IT IS
IMPERATIVE TO DISCARD partially used batteries, as their remaining life is not
very predictable.
ALWAYS
start an operation with a fresh battery.
T2001S Operating Instructions page 3
©2000 DTC Communications, Inc.
H25T2001S
Audio Circuit and Body Mounting Tips
The audio circuit is based on a DTC proprietary automatic gain control (AGC) hybrid
circuit and an external, high-sensitivity Knowles electret microphone. Excellent audio
quality is achieved in a wide variety of background noise environments.
All body-worn transmitters are susceptible to “clothing noise”. Reducing this rubbing
effect is accomplished in a variety of ways. After securing the transmitter to the body
with a secure mounting method such as an ACE bandage or custom harness:
1. Try to locate the microphone in an area t hat pickup will be bes t a nd r ubbing noise is
least. Avoid the arms, legs, crotch or under the arms or the waist area. Front torso
mounting is ideal.
2. Always provide a sma ll amount of strain relief on the microphone cable itself. This
reduces the noise caused by the microphone cable and element being tugged and
prevents cable damage.
3. Secure t he microphone cable to t he body with medical adhesive tape in at least two
spots, the final being about an inch below the element. Remember to leave a strain
relief loop!
4. Completely cover the microphone element (facing outward) with an ordinary Band
Aid™ . This provides a damped baffle for the microphone and a slick surface for
clothing to rub on, and actually does not impact audio pickup level at all.
T2001S Operating Instructions page 4
©2000 DTC Communications, Inc.
Loading...