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
