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SLM-3650 Satellite Modem
Options
A.1.4.1.1
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 TX 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 Function Select: Utility: Modem Type: Local Modem
AUPC menu. Proceed as follows:
1. Locate and enable the option.
2. Set all configuration parameters.
Notes:
1.
Comtech EF Data 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 RX signal to compensate for local rain fade unless
allowances are made for a narrow window for TX level changes.
4. Changes in local weather will attribute to cause level unbalancing in the TX
signal. The TX signal is attenuated due to heavy, dense, or cloud conditions.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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Revision 3
MN/SLM3650.IOM
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