Comtech EF Data C5 - Manual (Page 71)

C5/K1/K3 Integrated Satellite Terminal System Specifications
Rev. 0 2–37
2.4.3 APS Output (ODU)
The Antenna Pointing System (APS) output on the ODU has DC output as follows:
1. Before the demodulator locks to the desired carrier, the output toggles from
0 to +5 VDC at approximately a 0.5 Hz rate.
2. After the demodulator acquires the carrier, the output varies from 0 to +5 VDC,
proportional to the receive input signal level into the IDU.