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Displayed Message
Fail-CalcMismatch
CnC Ratio too high
LoclMargin too low
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,
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 ▲▼ arrow keys to select Y(Yes)and then press ENTER.
The CnC-APC status message on the bottom line of the display will update accordingly,
as per the following example:
The CnC Mode: APC,Side A,
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.
Appendix F
No Re-balance - the solution calculated by each end does not match
The CnC ratio is too high (>9 dB) for re-balancing to be attempted
There is insufficient local Eb/No margin for an APC re-balance
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
N (Y,N) APC is not active
F–30
CDM-425 Advanced Satellite Modem
Expanded Meaning
Band (Off, On, APC)
C-
()
C-
Band (Off, On, APC)
()
Revision 0
MN-CDM-425
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