Table of Contents
Advertisement
CDM-625A Advanced Satellite Modem
Appendix F
Displayed Message
DistMargin too low
Rx DataRate<64kbps
Rx DataRate<64kbps
Local RSL too low
Dist RSL too low
If the message shown begins with OK, then after approximately 5 seconds, the display
changes as per the following example:
The CnC Mode: APC,Side A,C-Band (Off, On, APC)
Suspend?
At this point, as indicated on the bottom line of the display, CnC-APC is active.
To suspend CnC-APC at any time: On the bottom line, which will be displaying Suspend?
N (Y,N), use the
status message on the bottom line of the display will update accordingly, as per the
following example:
The CnC Mode: APC,Side A,C-Band (Off, On, APC)
Activate?
Note that, when CnC-APC is suspended, it is de-activated on both sides.
If a message other than OK is displayed after attempting to perform a re-balance, the CnC-
APC system will not activate, and you should correct the link conditions before re-
attempting to activate it.
Expanded Meaning
There is insufficient local Eb/No margin for an APC re-balance
The Rx data rate needs to be 64 kbps or higher for APC
The Tx data rate needs to be 64 kbps or higher for APC
The local RSL is below the minimum for the operating symbol rate
The distant RSL is below the minimum for the operating symbol rate
N (Y,N) APC is active
arrow keys to select Y(Yes)and then press ENTER. The CnC-APC
▲▼
N (Y,N) APC is not active
IMPORTANT NOTE:
When CnC-APC is active, you are not permitted to change configuration
parameters that potentially affect the operation of CnC-APC (modulation type,
FEC type, code rate, framing, etc). If you attempt to change one of these
parameters either locally or remotely, the change will not be accepted. In order
to change these configuration parameters, CnC-APC needs to be suspended
first. Following the changes, you should re-activate CnC-APC. Be aware that the
re-activation will be preceded with a new re-balance operation.
F–27
Revision 0
MN-CDM625A
()
()
Advertisement
Chapters
Table of Contents
