User's Manual

Technalogix Ltd TAVD-500 Transmitter
VI-5
Remote Port
The remote port allows external control of the transmission system via the DB25. The Power
Amplifier enclosure does not include all the pins in the remote port like the Combiner/Filter
enclosure. The overall functions of each pin on the remote port are indicated in the following
table (see the Installation section for the specifics to each enclosure):
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
9 Reset
2
11 High temperature flag
3
12 High VSWR flag
3
13 Amplifier overdriven flag
3
14 +5Vdc
15 +3.3Vdc
16 Ground
17 Ground
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.
All other pins are not to be connected. Please see the Installation section for the specific pins
that are used for each enclosure.