Functional Description Of Async Overhead Channel Unit With Aupc; Aupc - Comtech EF Data SDM-650B Installation And Operation Manual

Asynchronous Overhead Channel Unit
F.4 Functional Description of ASYNC Overhead Channel Unit with AUPC
The ASYNC overhead channel unit with the AUPC option functions very much the same
as the original ASYNC overhead channel unit, except for some added features.
The connector pinouts and specifications apply to both versions of the ASYNC overhead
channel unit.
There are two added features in the AUPC version:
•
•
These features are outlined in the following sections.
F.4.1 AUPC
This feature is designed for remote communication between a local modem (A) and a
remote modem (B). This feature allows the local modem to maintain a constant
±
( 0.5 dB) E
The user has the ability to set the following parameters:
•
•
•
•
•
•
•
•
When AUPC is turned ON in the local modem, it allows commands from the remote end
to increment or decrement the power in 0.5 dB steps. This feature also allows power to be
changed for remote or local carrier loss.
When AUPC is turned OFF in the local modem, the commands are still sent, but the local
modem will not respond to the commands.
F–10
Automatic Uplink Power Control
Modem-to-Modem Channel for Remote M&C
/N by requesting changes in transmit power level from the remote modem.
b 0
AUPC Enable (turns the AUPC ON or OFF)
Remote Carrier Loss Action (Nominal, Maximum, Hold)
Carrier Loss Action (Nominal, Maximum, Hold)
Set Nominal Power Limit
Set Maximum Power Limit
Set Minimum Power Limit
Set Target E /N
b 0
Set Maximum Tracking Rate
SDM-650B Satellite Modem
Rev. 5