User`s manual

Tracker3 User’s Manual 9
6. Connections
6.1. SERIAL Connector
2: Data in (port A)
3: Data out (port A)
4: Power output for GPS
5: Ground
7: Data out (port B) or CTS
8: Data in (port B) or RTS
Note: The serial interface is configured as DTE (data terminal equipment) to
allow direct connection to a GPS receiver. Connection to a PC requires a null-
modem cable.
6.2. RADIO Connector
1: Audio out
2: COR / Squelch input
3: PTT out
5: Audio in
6: Ground
7: Power in
8: PTT in
6.3. ACCESSORY Connector
1: +5v output
2: Dallas 1-Wire data bus
3-6: 0-20v analog inputs
7: Counter / TX trigger input
8: Digital I/O line
9: Relay output
10: Ground
Connector is a pluggable 0.150” pitch screw terminal block.