Aupc; Edmac; Updating Modem Firmware - Comtech EF Data CDM-570A Installation And Operation Manual

1.2.6

AUPC

APPENDIX E. AUPC (AUTOMATIC UPLINK POWER CONTROL)
AUPC (Automatic Uplink Power Control) is an important feature that enables the modem to
automatically adjust its output power to maintain as constant the E
satellite link. This provides protection against rain fading, a particularly severe problem with Ku-
Band links.
Note that you can simultaneously use both EDMAC and AUPC. A benefit of AUPC is that,
whenever you select EDMAC/AUPC operation, you can view the remote demodulator's E
from the front panel display of the local modem.
To accomplish AUPC, you must use the framed EDMAC mode of operation. The distant end
modem constantly sends back information about the demodulator E
the overhead structure. The local modem uses the E
closed-loop feedback system over the satellite link.
1.2.7

EDMAC

Appendix J. EDMAC CHANNEL
EDMAC facilitates network management for small networks. In this mode, an additional 5%
overhead is combined with the traffic data, (1.6% in Turbo BPSK modes, Turbo Rate 21/44
QPSK/OQPSK, and all data rates greater than 2 Mbps). M&C information is added transparently,
allowing access to the distant-end modem.
Additionally, EDMAC-2 uses 1.6% overhead in all modes for those applications where the 5%
overhead is excessive. The EDMAC and EDMAC-2 modes do not require any additional cabling
at either the local or the distant-end modems.
The standard M&C control port provides access to EDMAC. Full monitor and control is possible,
and you may control the on/off status at the distant-end carrier.
1.2.8

Updating Modem Firmware

Chapter 4. UPDATING FIRMWARE
The modem uses 'flash memory' technology internally. This simplifies firmware updating.
You may perform the firmware update, without opening the modem, remotely over satellite (when
the modem is equipped with the optional Packet Processor), or by directly connecting a user-
supplied Microsoft Windows-based PC to the modem 'Ethernet 10/100 | M&C 100' port (for
modems without the optional Packet Processor) or the 'Ethernet 10/100 | Traffic 100' port (for
modems equipped with the optional Packet Processor).
Introduction
CDM-570A/570AL Satellite Modem with Optional Packet Processor
/N to adjust its output power and create a
b 0
1–10
Revision 5
/N of the remote end of the
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b
/N using reserved bytes in
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MN-CDM570A
/N
0