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CDM-Qx Satellite Modem
Front Panel Operation
(Config%Tx%Code) – TX CODE RATE
Tx Code Rate: 5/16 21/44 1/2
2/3 3/4 7/8 17/18
IMPORTANT
CASE
5/16
21/44
1/2
2/3
3/4
7/8
17/18
(Config%Tx%Data) – TX DATA RATE
Tx Data Rate: 05000.000kbps
Sym:02500.000ksps
Note: In Quad Drop & Insert (QDI) mode, these data rates are read-only; otherwise,
they are read/write. The data rate will be the sum of the tributary rates for all ports. This
also will show the calculated symbol rate and Nx64kbps (where N=001 to 128).
IMPORTANT
All possible choices are presented at all times. If an option is not
installed (either Hardware, or FAST) or valid, the ◄ ► arrow keys will
force the cursor to skip past the unavailable choice.
RULES
Valid for BPSK and Turbo
Valid for BPSK, QPSK and Turbo
Valid for BPSK, QPSK, Viterbi, Viterbi+R-S
Valid for TCM+R-S only (8-PSK)
Valid for QPSK, 8-PSK, and 16-QAM
Valid for QPSK, 8-PSK, and 16-QAM
Valid for QPSK, 8-PSK , and Turbo
The overall range of data rates is from 32 to 20000 kbps. The overall range
of symbol rates is up to 10000 ksps. The minimum data rate is set to 32
kbps only for BPSK and QPSK, and the maximum data rates are dependent
on modulation type and FEC encoder rate. If the user changes the
modulation or FEC, and the currently selected data rate can no longer be
supported, the data rate will be adjusted automatically, up or down,
keeping the symbol rate constant. The bottom line of the display shows the
symbol rate, based on FEC type, modulation, FEC Code Rate, and Data
Rate. The valid ranges of data rate are shown in the following table.
(◄ ►)
5–15
Revision 6
MN/CDMQx.IOM
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