User's Manual Part 2

VI-4
Remote Port
The remote port allows external control of the transmission system via the DB25. The functions of
each pin on the remote port are indicated in the following table:
Pin Number Description
1 Ground
2 Forward power sample
1
3 Reflected power sample
1
4 Carrier off
2
5 Carrier on
2
6 Increase carrier level (level must have been decreased)
2
7 Decrease carrier level (1dB increments)
2
8 Soft reset
2
9 Reset
2
10 Power supply fault flag
3
11 High temperature flag
3
12 High VSWR flag
3
13 Amplifier overdriven flag
3
14 +5Vdc
15 +3.3Vdc
16 Ground
17 Ground
18 N/C
19 N/C
20 N/C
21 N/C
22 N/C
23 N/C
24 N/C
25 N/C
Notes: 1. Analog output with voltage ranging from 0 to 5Vdc.
2. TTL level digital input, active on rising edge.
3. TTL level digital output, active high.