User's Manual

10
The radio pin out may be connected to two DB9 connectors according to the following pin diagram:
Depending upon configuration, before connecting to a computer, each serial port may need to pass
through a 3.3V TTL to RS232 converter such as this SerialComm TTL-232-33P. The radio is either
manufactured for a high speed 3.3V interface or for a conventional speed RS-232 interface.
In order to power the radio, 4.5-7.5V DC must be applied across pins 7 and 10. The lower voltage
range is acceptable for lower output power operation.