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SDM-300A Satellite Modem
Corrected
Command:
BER Log
Response:
Examples:
Interface
Command:
Read Error
Response:
Status
Rev. 4
<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;,,,,,,,2003,5207,10
10,<1012,,,,,,,,,,,,,,,,,,,,,'cr''lf']
<add/IRES_'cr'
>add/IRES_tttt_xn.nE-ee'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.
Where:
tttt = FRM (FRAME) or 2047 (indicates type of error being
read).
x = < or > (data modifier to indicate that the error rate is
less than or greater than the returned value).
m.m = 1.0 to 9.9 (error rate mantissa).
ee = 1 to 99 (error rate exponent).
This command returns frame or 2047 error rate. The 'IRE_'
configuration command is used to select reading of frame or
2047 errors.
Notes:
1. The 'x' (< or >) parameter is only returned if the error
rate has exceeded the computational resolution of the
system.
2. 'No Data' is returned if the error rate cannot be
calculated.
3. 'Sampling' is returned if not enough data is currently
available to calculate the error rate.
Remote Control Operation
B–33
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