User`s manual

Tracker3 User’s Manual 8
inputs, a counter/transmit trigger input, a digital I/O pin, and a 7-amp solid state
relay output.
5.2. Rear Panel
The rear panel has a female 9-pin D-sub connector for connection to a radio. A
male 9-pin D-sub connector provides, depending on software configuration, a
single RS-232 port with hardware flow control or dual independent RS-232 ports.
A standard 2.1x5.5mm center-positive power connector accepts from 7 to 28 volts
DC, and a USB type B connector can be used to connect the tracker to a PC.