Self-Monitoring Local Modem Aupc Control - Comtech EF Data SDM-300L3 Installation And Operation Manual

SDM-300L3 Satellite Modem
Asynchronous Interface/AUPC
11.2.1.1 Remote AUPC
This feature allows the user to monitor and control a remote modem location using the
front panel or serial port of the local modem. The operator can set or reset the following
commands:
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•
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11.2.1.1.1 Remote Modem AUPC Configuration and Monitor
The menu for this feature is remote AUPC, which is at the same level as the
Configuration and Monitor menus. The menus are structured as follows:
Function Select Remote AUPC
Remote AUPC Configuration
AUPC Enable
B-Band LoopBack
TX 2047 Pattern
Remote AUPC Monitor
2047 Error
11.2.2

Self-Monitoring Local Modem AUPC Control

This AUPC mode allows the modem to adjust its carrier power to maintain a target
Eb/No while it monitors its own carrier returned through the satellite. This is often used
in broadcast applications where a hub maintains control of the outbound carrier that is
delivered to many remotes. This requires that the Earth Station is located within the
satellite footprint.
The self-monitoring AUPC does not require any special hardware or software options.
However, if the Overhead Card or Reed-Solomon Cards are installed, do not select either
the ASYNC or AUPC from the Modem Type menu located under the Utility: Modem
Type menu, because these are used for AUPC between two modems.
To setup the modem for the self-monitoring operation, enter the Local Modem AUPC
menu located under the Utility Modem Type menu and select On. This enables the
Configuration: Local AUPC menu to permit adjustment of the AUPC parameters
described in Table 11-1.
Baseband loopback
TX 2047 pattern
AUPC enable
Menu
Press <ENTER> to proceed.
Press <ENTER> to proceed.
Select On to enable Remote AUPC.
Select On to place the unit at the distant end of the link in
loopback.
Select On for the distant end to TX a 2047 pattern. Select Off to
stop the pattern distant end.
Press <ENTER> to proceed.
This indicates the BER at the distant end measured from the 2047
pattern. This requires that the 2047 pattern is tuned On at the near
end.
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MN/SDM300L3.IOM
Description