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CDM-Qx Satellite Modem Revision 5
Front Panel Operation MN/CDMQx.IOM
5–27
(ConfigRxData) – RX DATA RATE
In QDI mode, these data rates are read-only! The data rate will be the sum of the
tributary rates for all ports. This will also show the calculated symbol rate and Nx64kbps
(where N=001 to 124).
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 and 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.
FEC Type
Modulation Code Rate Data Rate Range EDMAC limited?
Viterbi BPSK Rate 1/2 32 kbps to 5 Mbps Yes – see note below
Viterbi QPSK Rate 1/2 32 kbps to 10 Mbps Yes – see note below
Viterbi QPSK Rate 3/4 32 kbps to 15 Mbps Yes – see note below
Viterbi QPSK Rate 7/8 32 kbps to 17.5 Mbps Yes – see note below
Viterbi + R-S BPSK Rate 1/2 32 kbps to 4.5 Mbps Yes – see note below
Viterbi + R-S QPSK Rate 1/2 32 kbps to 9.1 Mbps Yes – see note below
Viterbi + R-S QPSK Rate 3/4 32 kbps to 13.7 Mbps Yes – see note below
Viterbi + R-S QPSK Rate 7/8 32 kbps to 16 Mbps Yes – see note below
Viterbi + R-S 16-QAM Rate 3/4 349.1 kbps to 20 Mbps Yes – see note below
Viterbi + R-S 16-QAM Rate 7/8 407.3 kbps to 20 Mbps Yes – see note below
TCM + R-S 8-PSK Rate 2/3 232.7 kbps to 18.3 Mbps Yes – see note below
TPC BPSK Rate 5/16 32 kbps to 3.1 Mbps Yes – see note below
TPC BPSK Rate 21/44 32 kbps to 4.7 Mbps Yes – see note below
TPC QPSK Rate 21/44 32 kbps to 9.5 Mbps Yes – see note below
TPC QPSK Rate 3/4 32 kbps to 15 Mbps Yes – see note below
TPC QPSK Rate 7/8 32 kbps to 17.5 Mbps Yes – see note below
TPC QPSK Rate 17/18 32 kbps to 18.888 Mbps Yes – see note below
TPC 8-PSK Rate 3/4 288 kbps to 20 Mbps No
TPC 8-PSK Rate 7/8 336 kbps to 20 Mbps No
TPC 8-PSK Rate 17/18 362.7 kbps to 20 Mbps No
TPC 16-QAM Rate 3/4 384 kbps to 20 Mbps No
TPC 16-QAM Rate 7/8 448 kbps to 20 Mbps No
Important Note: Where noted in the table above, if EDMAC framing is employed, the upper data rate will be reduced
by 5% for data rates up to 2.048 Mbps, and by 1.6% for data rates above 2.048 Mbps, where EDMAC2 framing is
used, or for Rate 21/44 BPSK/QPSK Turbo, or Rate 5/16 BPSK Turbo.
Rx Data Rate: 05000.000kbps
Sym:02500.000ksps
IMPORTANT