Comtech EF Data C5 - Manual (Page 253)

C5/K1/K3 Integrated Satellite Terminal System Options
Rev. 0 A–9
A.2.1.1.1 Self-Monitoring Local Modem AUPC Control
Note: This feature is available with or without the overhead PCB installed. Self-
monitoring AUPC is not used when the ASYNC/AUPC option is installed, because the
ASYNC/AUPC feature uses the overhead channel to control the modem’s output power.
The operator can allow the modulator to control its own transmit power when the earth
station is in the same satellite footprint. The operator should tune the demodulator to
receive its own signal, similar to a satellite loop.
Note: This option can be used for half-duplex operation and for one signal transmitting to
many sites. For full-duplex operation, use a separate demodulator.
This option is located in the Utility/Modem Type/Local Modem AUPC menu. Proceed as
follows:
1. Locate and enable the option.
2. Set all configuration parameters.
Notes:
1. EFData does not recommend increasing the power to the satellite without
consulting with the satellite controller.
2. Be careful not to set carrier output to the high-side when there is a loss of carrier
due to severe weather.
3. Do not use the distant end receive signal to compensate for local rain fade unless
allowances are made for a narrow window for transmit level changes.
4. Changes in local weather will attribute to cause level unbalancing in the transmit
signal. The transmit signal is attenuated due to heavy, dense, or cloud conditions.