DTC Communications T2050 Surveillance Transmitter for Law Enforcement User Manual T2050 Users

DTC Communications Inc. Surveillance Transmitter for Law Enforcement T2050 Users

T2050 Users

DOCUMENT NUMBER: OP1920102 REV. 2DESCRIPTION: T-2050 OPERATING INSTRUCTIONS ECO NUMBER:_______ Page____of________ Date:_____________ Orig:_____________ SIGN OFF DATE: mm/dd/yyProj Eng._________________Mfg Mgr. _________________Documentation ____________Eng. Mgr._________________Purchasing _______________
OP1920102 REV 1 02/26/01DTC Communications, Inc. Page 1 of 9DTC COMMUNICATIONS, INC.Operating Instructions for the T-2050 PagerDisguise Transmitter
OP1920102 REV 1 02/26/01DTC Communications, Inc. Page 2 of 9IntroductionThe T-2050 is a 200mW audio surveillance transmitter installed in a Motorola FLEX™pager housing. This narrowband compliant device is synthesized and supports advancedfeatures and has as 4-channel capability. Channel selection is made by the user duringpower-up, via the reset button. The channel selection is stored in non-volatile memory.The pager is also equipped with a vibrator, which is used to communicate to the operator,the channel selection, power-up and power-down and a low battery condition. The T-2050 also sends short tones over the air for power up and power down notification andsends a tone once a minute for a low battery warning.Default factory programming is for the transmitter to transmit immediately upon insertionof the AA battery, on the same channel that was last selected. Factory programmingprovides for various options such as User Turn ON, User Turn OFF, and User LowBattery Indicate.The transmission is a narrow-band FM signal, of 2.5 kHz deviation, which is compliantto NTIA analog transmission mode. The antenna is an internal loop antenna, tuned to aspecific 2 MHz operating range. The audio circuitry is built around a Gennum automaticgain control (AGC) circuit, and an internal high-quality Knowles microphone. Outputpower does not change over the T-2050’s operational battery life, due to a step-upswitching power supply circuit. The efficient switching power supply converts the 1.5volts from the Eveready L91 Lithium battery to 5 volts for operating the transmitter.Battery life is over two hours at a constant 200mW.The pager display and controls operate normally, contributing to the covert packaging.The pager will also go through the normal paging beep sequence on power up. TheT-2050, however, does not receive paging messages.DescriptionBatteryThe T-2050 will operate correctly ONLY with an Eveready model L91 or e² LithiumAA battery installed. A fresh battery will operate the unit for over two hours. The T-2050 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) Unlock the battery door by sliding the door latch away from the battery door.2) Slide the battery door in the direction of the arrow (toward the outer edge).3) Lift the battery door away from the housing to remove it.
OP1920102 REV 1 02/26/01DTC Communications, Inc. Page 3 of 94) Place the battery into the battery compartment, taking note of the positive (+) andnegative (-) 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: As soon as the battery is inserted, the pager will sound the normal MotorolaFLEX™ pager power up alert.In the factory default program mode, the transmitter is powered up from the momentthe battery is inserted into the unit on the last selected channel. There is no powerswitch in the factory default program mode.Audio CircuitThe audio circuit is based on a Gennum automatic gain control (AGC) microcircuit andan internal, high-sensitivity Knowles electret microphone. When the pager is placed inthe holder and worn on the body, the microphone is located behind a small hole on theside of the pager facing up. Excellent audio quality will be achieved if this hole is keptclear of fingers and clothing.All body-worn transmitters are susceptible to “clothing noise”. The standard Motorolapager holder that comes with the T-2050 tends to keep the microphone away from thebody and clothing, reducing the tendency to generate clothing noise.Flex™ Pager FeaturesThe Flex™ pager has several features that remain fully functional and assist in the pagerdisguise.One useful feature is the clock display of the pager. Feel free to set the time and date onthe display. The Flex™ pager instruction manual will describes how to set the internalclock. If not set to the correct time of day, the clock will act as a timer indicating the timeelapsed since turn on. This may help in assessing battery life remaining however thepager clock may continue to operate even though the transmitter circuitry has shut downdue to a low battery condition.You may use the built in alarm clock feature of the pager. As you navigate through thefunction menu you will find a “Set Alarm” function. This can be used to simulate a pagebeing received at a certain time. When the alarm is set, a “bell” symbol is visible in thelower left corner of the screen.The regular Flex™ pager beeper is still active in the unit. By scrolling through thepager’s menus, the user can set the alert type (i.e. the sound of the beeps) for the pager,and cause the beeper to activate. This may be useful to show that the pager is “real”. Inthe T-2050, the vibrator is not controlled by the Flex™ pager circuitry and therefore willnot activate as in a normal Flex™ pager. The vibrator in the T-2050 is used to providefeedback to the operator during channel setting and other functions and is controlled bythe T-2050 circuitry.
OP1920102 REV 1 02/26/01DTC Communications, Inc. Page 4 of 9One of the Flex™ pager functions is “Turn Pager Off/On”. This is purely a Flex™ pagerfunction and refers only to the Flex™ pager circuitry. The Flex™ pager “Turn PagerOff/On function will have NO EFFECT on operation of the T-2050 transmitter.Operation1. Place the holder on a belt and load a Lithium AA battery into the pager. The pagerwill power-up and beep, showing the date, time in the display. After about 10seconds the display will blank and only show the “power-on” symbol and the speakersymbol.2. Pressing any button will re-activate the display. You may access the menus per theFlex™ pager instructions, if you wish. NONE OF THE BUTTONS OR RELATEDFUNCTIONS WILL HAVE ANY EFFECT ON THE TRANSMITTERWHATSOEVER IN THE FACTORY DEFAULT PROGRAM MODE.3. Slide the unit into the belt holder. The T-2050 is now operating.4. Remove the battery when not in use. The unit will transmit when an operating batteryis in place; there is no on/off switch in the default program mode. IT ISIMPERATIVE TO DISCARD partially used batteries, as their remaining life is notvery predictable. ALWAYS start an operation with a fresh battery.Unique T-2050 FeaturesDefault Features – These features are enabled at the factory:• Immediate TX-ON when battery is inserted• Active display• Active Beeper• Active clock• Low battery tone burst (triple beep) transmission every 60 seconds• User Channel Selection1. Channel selection is made by holding the main pager reset button (large oval button,black with a green stripe) while inserting the battery (the selection of up to 4 pre-programmed channels are available).2. If the button is held when the battery is inserted, the vibrator immediately emits aseries of pulses representing the number of the channel that was last used.3. If the button is released within three seconds of the last pulse, the unit selects thesame channel that was last used (i.e. no change).4. If the button is held for more than three seconds, another series of pulses are emittedrepresenting the next available channel. For example, if the first series of pulsesconsisted of two pulses (representing channel 2), then the next series will consist of 3pulses.
OP1920102 REV 1 02/26/01DTC Communications, Inc. Page 5 of 95. If the button is released within 3 seconds, the device will select the new channel.6. The series of pulses will continually increment and repeat as long as the button is helddown (1, 2, 3, 4, 1, 2… etc.) . The highest number of channels is 4.

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