Comtech EF Data CIM-300L User Manual
Page 107
CiM-300L IP Enabled Satellite Modem
Rev. 1
Serial Remote Control
CD/CIM300L.IOM
81
Parameter
Type
Protocol
Description
Corrected
BER Log
Command:
Response:
Examples:
[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.
Eb/No Status Command:
Response:
Where:
x = < or > (data modifier to indicate that the Eb/No is less than or
greater than the returned value).
nn.n = 1.0 to 99.9 (Eb/No value).
Notes: 1. The 'x' (< or >) parameter is only returned if the Eb/No
has exceeded the computational resolution of the
system.
2. 'No Data' is returned if the Eb/No cannot be
calculated.
3. 'Sampling' is returned if not enough data is currently
available to calculate the Eb/No.
Modulator
Rate Status
Command:
Response:
Where:.
nnnn = 1/2 (QPSK 1/2), [coder rate], 3/4 (QPSK 3/4), 7/8 (QPSK
7/8), BP12 (BPSK 1/2), 8P23 (8PSK 2/3), (OQ12 (OQPSK 1/2),
OQ34 (OQPSK 3/4), OQ78 (OQPSK 7/8)
mmmm.mmm = Data rate in kHz