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Command
Length of
Parameter
(Instruction
Arguments
& Qualifier)
Retrieve next
N/A
135 bytes
five unread
Stored
Statistics
Serial Remote Control
Description of Arguments
Query only.
Returns the oldest five stored Statistics that have not yet been read, in the form [CR]sub-body[CR]sub-
body[CR] sub-body[CR]sub-body[CR]sub-body where:
For all non-ACM modes, the statistics sub-body is defined as
•
AA.ABB.BC.CD.Dddmmyyhhmmss where:
AA.A=Minimum Eb/No during sample period.
BB.B=Average Eb/No during sample period.
C.C=Maximum Tx Power Level Increase during sample period.
D.D=Average Tx Power Level Increase during sample period.
ddmmyy=date stamp.
hhmmss=time stamp.
In VersaFEC ACM (IP-ACM) mode, the statistics sub-body is defined as
•
AA.ABB.BC,DE,Fddmmyyhhmmss, where:
AA.A=Minimum SNR during sample period.
BB.B=Average SNR during sample period.
C=IP-ACM Rx ModCod that was current at time the statistic entry was logged.
D=Maximum Rx ModCod in hex during sample period.
E=Minimum Rx ModCod in hex during sample period.
F=Number of Rx ModCod changes in hex format during sample period.
ddmmyy=date stamp.
hhmmss=time stamp.
In VersaFEC-2 ACM mode, the statistics sub-body is defined as
•
AA.ABB.BCC,DD,ddmmyyhhmmss, where:
AA.A=Minimum SNR during sample period.
BB.B=Average SNR during sample period.
CC=Maximum Rx ModCod in decimal during sample period.
DD=Minimum Rx ModCod in decimal during sample period.
ddmmyy=date stamp.
hhmmss=time stamp.
NOTES:
1) If there are less than five retrievable statistics, the remaining positions are padded with zeros.
2) If there are no new events, the unit replies with RNS*.
Do not mix use of RNS and RNN. Comtech EF Data recommends that you limit your use of RNS to
maintain backward-compatibility with other legacy modems or when the unit is used in CDM600/L
Emulation mode. RNS is a legacy query that does NOT provide Rx Signal Level (RSL) information as
RNN does. Since RNS and RNN use the same index system for statistics entries, if users mix use of
the two queries, the statistics entries won't be displayed sequentially by either RNS or RNN. For this
reason, and if you change your operating mode between Non-ACM and ACM (IP-ACM or V2-ACM)
modes, Comtech EF Data recommends that you execute the Clear All Stored Statistics (CAS=)
command before retrieving any further statistics.
8–29
CDM-425 Advanced Satellite Modem
Revision 0
Query
Response to
(Instruction
Response to Query
Command
& Qualifier)
N/A
RNS?
RNS=[CR]sub-
body[CR]sub-
body[CR]
sub-body[CR]sub-
body[CR]sub-body
(see Description of
Arguments)
MN-CDM-425
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