User`s manual

OpenTracker USB User’s Manual 3
3. Hardware Description
3.1. SERIAL Connector Pin Assignments
2: Data in (port A)
3: Data out (port A)
4: Power output for GPS
5: Ground
7: Data out (port B)
8: Data in (port B)
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.
3.2. RADIO Connector Pin Assignments
1: Audio out
2: COR / Squelch input
3: PTT out
5: Audio in
6: Ground
7: Power in (7 to 24 volts)
8: PTT in
9: AUX IO / GPIO1 / Power relay output
3.3. Internal Header CN4
1: +5 Volt power
2: 1-Wire data bus
3: Analog input 1
4: Analog input 2
5: Analog input 3
6: Analog input 4
7: Digital input/output
8: Ground