9
5
1
6
Figure B-8 RS232 Port
(Female 9 pin D-Sub)
Table B-8 RS232 Serial Port
Pin #
Description
1
Data Carrier Detect (Input)
2
Receive Data (Input)
3
Transmit Data (Input)
4
Data Terminal Ready (Output)
5 Signal
Ground
6
Data Set Ready (Input)
7
Request to Send (Output)
8
Clear to Send (Input)
9 Not
Used
NOTE: This rear panel port is connected to COM4 on the RFMOW V2 internal computer. This rear panel
port is disabled when the software directs the input and output of the GPS receiver to COM4 on the internal
computer. Also under software control, the internal port can be connected to the Secure Voice Unit circuits
for testing, at which time this rear panel port is disabled.
25
