Comtech EF Data CDM-570A Installation And Operation Manual page 550

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Appendix G
For the CDM-570A only: On the bottom line, select use use the
Act? (Activate?) as Y or N (where Y? N is equivalent to Suspend for L-Band units).
Mode: APC,Side-A, C-band
Act?Y APC is not active
Press ENTER when done.
For either unit, the message on the bottom line can be any one of the following:
Displayed Message
OK-ReBalance Done
OK(P)CnCRatioLim
OK(P)-LocalPwrMin
OK(P)-LocalPwrMax
OK(P)-LocalPwrLim
OK(P)-DistPwrMin
OK(P)-DistPwrMax
OK(P)-DistPwrLim
OK(P)-Incomplete
No APC Frame Sync
Locl EbNo too high
Dist EbNo too high
DistEnd ReBal fail
DistEnd NoResponse
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:
CnC-APC:Activate Suspend
No APC Frame Sync
At this point, as indicated on the bottom line of the display, CnC-APC is active.
Expanded Meaning
Full re-balance was achieved
Partial re-balance, limited by CnC ratio approaching its working limit
Partial re-balance, limited by local power approaching its lower limit
Partial re-balance, limited by local power approaching its upper limit
Partial re-balance, limited by local power approaching TPLI
Partial re-balance, limited by distant power approaching its lower limit
Partial re-balance, limited by distant power approaching its upper limit
Partial re-balance, limited by local power approaching TPLI
Partial re-balance, algorithm did not fully converge
Communication not possible – no APC frame sync
The local Eb/No is too high (>16 dB) to determine re-balance params
The distant Eb/No is too high (>16 dB) to determine re-balance params
The distant end failed to re-balance
The distant end failed to respond
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
G–26
MN-CDM570A
Revision 3
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