DTC Communications PB3 Surveillance Beacon Transmitter for Law Enforcemen User Manual PB3 Operating Instructions

DTC Communications Inc. Surveillance Beacon Transmitter for Law Enforcemen PB3 Operating Instructions

PB3 Operating Instructions

DOCUMENT NUMBER: OP1920033 REV. ADESCRIPTION: PB-3 OPERATING INSTRUCTIONSECO NUMBER:_______Page____of____Date:_____________Orig:_____________SIGN OFF DATE: mm/dd/yyProj Eng._________________Man Mgr. _________________Documentation ____________Eng. Mgr._________________
IntroductionThe PB3 is a covert, VHF, dual-mode beacon/alarm transmitter housed in ultra-low-profile package. It incorporates 3-axis motion detection and a breakwire circuit. A singlemicroprocessor controls all functions, allowing the beacon to be very compact. The RFpower output is 1 watt. A screw-type terminal strip allows solderless connections,making it "field-friendly".DescriptionBatteryThe PB-3 will operate from any 6-volt source. DO NOT connect the unit to a 12-voltsource, such as a car battery, or damage will result. The PB-3 is shipped with a 4xAAbattery holder, which will provide long battery life. The PB-3 is protected from damagefrom reversed battery polarity.PB-3 FeaturesThe PB-3 has a terminal strip which allow the user to connect a power source, abreakwire, and to select features. The breakwire and feature selection will be described indetail.Breakwire inputThe breakwire input on the PB-3 will detect a change-of-state. This means that you canuse the breakwire in the traditional way and use a wire loop from the BREAKWIRE pinto the GROUND pin on the terminal strip. After the power is applied, if the loop breaksthe alarm will go off. If you want, you can use a normally-open switch as well; justconnect it between the BREAKWIRE and GROUND pins, and the alarm will go off if theswitch is closed. The important thing is that the BREAKWIRE pin is in the "safe"condition, before you apply power to the transmitter. Once the alarm goes off, it cannotbe turned off except by powering down the transmitter.Mode selectionThe PB-3 is two devices in one: it's a beacon transmitter and an alarm transmitter.To select beacon mode, nothing should be connected to the MODE pin. The PB-3 willtransmit pulses (100% Birddog (tm) compatible), sense motion (if MOTION ENABLE isconnected to GROUND), and transmit an alarm on a change in the state of theBREAKWIRE pin.To select alarm transmitter mode, place a short from the MODE pin to GROUND. ThePB-3 will transmit a short confidence tone every thirty seconds, until the BREAKWIREpin changes state (see above) and the alarm goes off.
The alarm is the same for both beacon transmitter mode and alarm transmitter mode. It isa 50% duty cycle, 1 kHz tone transmitted once per second.AntennaThe antenna connector on the PB-3 is an MMCX. Various wire antennas can be usedwith the PB-3; it has an SWR tolerance of 12:1 (or better) . The wire antenna shippedwith the unit is optimized for the frequency of operation. Ideally, it will be kept stretchedout and away from metal objects as much as possible. Contact the factory for otherantenna configurations.Operation1. Choose beacon transmitter or alarm transmitter mode. Connect the MODE andGROUND pins for alarm transmitter mode, leave it open for beacon transmittermode. 2. If motion sensing is desired, connect a wire between MOTION ENABLE andGROUND. 3. If a breakwire input is desired, connect it between the BREAKWIRE and GROUNDpins. 4. Connect a suitable antenna. 5. Connect a 6-volt power source. 6. Verify that the signal is being received.

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