DTC Communications PB3 User Manual

DOCUMENT NUMBER: OP1920033 REV. A

DESCRIPTION: PB-3 OPERATING INSTRUCTIONS

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Introduction

The PB3 is a covert, VHF, dual-mode beacon/alarm transmitter housed in ultra-low­profile package. It incorporates 3-axis motion detection and a breakwire circuit. A single
microprocessor controls all functions, allowing the beacon to be very compact. The RF
power output is 1 watt. A screw-type terminal strip allows solderless connections,
making it "field-friendly".

Description

Battery

The PB-3 will operate from any 6-volt source. DO NOT connect the unit to a 12-volt
source, such as a car battery, or damage will result. The PB-3 is shipped with a 4xAA
battery holder, which will provide long battery life. The PB-3 is protected from damage
from reversed battery polarity.

PB-3 Features

The PB-3 has a terminal strip which allow the user to connect a power source, a
breakwire, and to select features. The breakwire and feature selection will be described in
detail.

Breakwire input

The breakwire input on the PB-3 will detect a change-of-state. This means that you can
use the breakwire in the traditional way and use a wire loop from the BREAKWIRE pin
to the GROUND pin on the terminal strip. After the power is applied, if the loop breaks
the alarm will go off. If you want, you can use a normally-open switch as well; just
connect it between the BREAKWIRE and GROUND pins, and the alarm will go off if the
switch 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 cannot
be turned off except by powering down the transmitter.

Mode selection

The 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 will
transmit pulses (100% Birddog (tm) compatible), sense motion (if MOTION ENABLE is
connected to GROUND), and transmit an alarm on a change in the state of the
BREAKWIRE pin.

To select alarm transmitter mode, place a short from the MODE pin to GROUND. The
PB-3 will transmit a short confidence tone every thirty seconds, until the BREAKWIRE
pin changes state (see above) and the alarm goes off.