DTC Communications T99FG Surveillance Transmitter for Law Enforcement User Manual Operating Instructions

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Document ID	24333
Application ID	jv1buSXUNI7UhxHtAmrRfQ==
Document Description	Operating Instructions
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	1.02kB (12760 bits)
Date Submitted	1999-02-22 00:00:00
Date Available	1999-04-19 00:00:00
Creation Date	2001-07-05 08:09:10
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2001-07-05 08:09:11
Document Title	Operating Instructions

H25T99FG
DTC COMMUNICATIONS, INC.
Operating Instructions for the T99FG
Version 1.0
OP1920058
T99FG Operating Instructions
page 1
©1999 DTC Communications, Inc.
H25T99FG
Introduction
The T99FG is a 200mW covert transmitter board, which may be installed in host devices
such as the Motorola FLEX™ pager housing. The output power does not change over its
operational battery life, unlike other covert transmitters due to a novel step-up switching
power supply circuit. The transmission is a narrow-band FM signal, of 5 kHz deviation.
The antenna is an internal loop antenna, tuned to the specific operating frequency. The
audio circuitry is built around a Gennum automatic gain control (AGC) circuit, and a
high-quality Knowles microphone. The efficient switching power supply converts the
1.5 volts from the Eveready L91 Lithium battery to 4 volts for operating the transmitter.
Battery life is over two hours at a constant 200mW. The internal antenna is custom
designed, and is individually tuned during manufacturing for maximum radiation. The
pager display and controls operate normally, contributing to the covert packaging. The
pager, however, does not receive pages.
Description
Battery
The T99FG will operate correctly ONLY with an Eveready model L91 Lithium AA
battery installed. A fresh battery will operate the unit for over two hours. The T-99-FG
will operate for less than 15 minutes with a standard alkaline battery installed.
To install the battery, hold the pager face down and proceed as follows:
1)
2)
3)
4)
Unlock the battery door by sliding the door latch away from the battery door.
Slide the battery door in the direction of the arrow (toward the outer edge).
Lift the battery door away from the housing to remove it.
Place the battery into the battery compartment, taking note of the positive (+) and
negative (-) markings on the battery and the pager housing.
5) Replace the battery door and lock by sliding the door latch toward the battery door.
NOTE: The pager will sound the power up alert and IS NOW TRANSMITTING.
The transmitter is powered up from the moment the battery is inserted into the unit.
There is no power switch.
Audio Circuit
The audio circuit is based on a Gennum automatic gain control (AGC) microcircuit and
an internal, high-sensitivity Knowles electret microphone. When the pager is placed in
the holder and worn, the microphone is located behind a small hole on the side of the
pager facing up. Excellent audio quality will be achieved if this hole is kept clear of
fingers and clothing.
T99FG Operating Instructions
page 2
©1999 DTC Communications, Inc.
H25T99FG
All body-worn transmitters are susceptible to “clothing noise”. The holder that comes
with the T99FG tends to keep the microphone away from the body, reducing this
tendency.
Flex™ Pager Features
The Flex™ pager has several features that are fully functional and assist in the pager
disguise.
One useful feature is the clock display of the pager. Feel free to set the time and date on
the display. But, if you do not, the clock will act as a timer indicating the time since turn
on. This may help in assessing battery life remaining.
You may use the built in alarm clock feature of the pager. As you navigate through the
function menu you will find a “Set Alarm” function. This can be used to simulate a page
being received at a certain time. When the alarm is set, a “bell” symbol is visible in the
lower left corner of the screen.
The beeper and vibrator are both still active in the unit. By paging through the menus,
you can set the alert type for the pager, and cause the beeper and vibrator to activate.
This may be useful to show that the pager is “real”.
Remember that the “Turn Pager Off/On” function will have NO EFFECT on the
transmitter.
Operation
1. Place the holder on a belt and load a Lithium AA battery into the pager. The pager
will power-up and beep, showing the date, time and the word Airtouch™ in the
display. After about 10 seconds the display will blank and only show the “power-on”
symbol and the speaker symbol.
2. Pressing any button will re-activate the display. You may access the menus per the
Flex™ instructions, if you wish. NONE OF THE BUTTONS OR RELATED
FUNCTIONS WILL HAVE ANY EFFECT ON THE TRANSMITTER
WHATSOEVER.
3. Slide the unit into the belt holder.
4. Remove the battery when not in use. The unit will transmit when an operating battery
is in place; there is no on/off switch. IT IS IMPERATIVE TO DISCARD partially
used batteries, as their remaining life is not very predictable. ALWAYS start an
operation with a fresh battery.
T99FG Operating Instructions
page 3
©1999 DTC Communications, Inc.

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