Comtech EF Data SDM-300A User Manual

Page 434

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SDM-300A Satellite Modem

Revision 6

Remote Control Operation

MN/SLM3650.IOM

A–42

Corrected
BER Log

Command:
Response:

Examples:

<add/CBEL_'cr'
>add/CBEL_t.t;s1,s2,s3 ... sn'cr''lf']

[No new compiled data from last poll]
>add/CBEL_1.0'cr''lf']

[Momentary lock in 32 time intervals: 2.0E-3,
5.2E-7, 1.0E-10, <1.0E-12]

>add/CBEL_1.0;,,,,,,,2003,5207,1010,<1012,
,,,,,,,,,,,,,,,,,,,,'cr''lf']

Where:

t.t = Time between corrected BER samples in seconds
('0.1' to '9.9').

; = At least one data point has been logged.

s1 to sn = Corrected BER samples in the format of
(xmmee).

x = The optional data modifier '<' or '>' (less than or
greater than).

mm = The corrected BER mantissa ('10' for 1.0 to '99 for
9.9).

ee = The corrected BER negative exponent ('00' to '99').

Error data (samples) are compiled at the nominal system
rate indicated by the time parameter (t.t). The samples
are stored in a thirty-two-element FIFO. When the
'CBEL_' command is received, the samples in the FIFO
are formatted and returned as indicated. The FIFO is
then flushed. If the FIFO becomes full, the oldest sample
will be lost as the current sample is written.

Notes:

1. The most recent sample is represented by 'sn' while

the least recent sample is represented by 's1'.

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.

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