Comtech EF Data SDM-309B, Installation And Operation Manual

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SDM-309B Satellite Modem Remote Control
MN/U-SDM309B Rev. # B-B–21
2. Data delimited by a comma (“,”) will be returned for all time intervals logged.
3. The optional data modifiers “>“ and “<“ are only present if the error rate
exceeds the computational resolution of the system.
Examples:
No Data -
>add/CBEL_1.0”cr””lf”]
Momentary lock in 32 time intervals -
>add/CBEL_1.0;,,,,,,,0203,<0108,<0108,<0108,,,,,,,,,,,,,,,,,,,,,”cr””lf
”]
5.9 Eb/N0 Status
The Eb/N0 status command causes the Eb/N0 ratio to be returned. Eb/N0 is returned in
dB.
Command:
<add/EBN0_”cr”
Response:
>add/EBN0_nn.ndB”cr””lf”]
Example: Request Eb/N0 ratio from modem 2.
Command: <2/EBN0_”cr”
Response:
>2/EBN0_4.2dB”cr””lf”]
Nb/N0 = 4.2dB
Note: EB/N0 limits are; lower <3.2dB, upper >9.7dB (the upper limit is >16.0dB for the
949 decoder). "No Data" is returned if no carrier is detected (decoder not locked).
5.10 Modulator Rate Status
Command:
<add/MR_”cr”
Response:
>add/MR_nnn_mmmm.m”cr””lf”]
nnn = 1/2,3/4,7/8 (Coder rate).
mmmm.m = 56.0 to 4080.0 (Data rate)
Note: The parameters nnn_mmmm.m may be replaced by N/A to indicate
no assignment.
5.11 Demodulator Rate Status
Command:
<add/DR_”cr”
Response:
>add/DR_nnn_mmmm.m”cr””lf”]
nnn = 1/2,3/4, or 7/8 (Decoder rate).
mmmm.m = 56.0 to 4080.0 (Data rate)
Note: The parameters nnn_mmmm.m may be replaced by N/A to indicate no assignment.