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CDM-Qx Satellite Modem Revision 5
Front Panel Operation MN/CDMQx.IOM
5–18
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.
(ConfigTxFreq) – TX IF FREQUENCY
Edit the Transmit IF Frequency. This is accomplished by selecting the digit to be edited,
using the WXarrow keys. The value of the digit is then changed using the STarrow
keys. The user should then press ENT. The range of frequencies depends upon the plug-
in module. The above example shows the L-Band version of modem.
Tx IF Freq: 1156.3456 MHz
(◄ ►,▲ ▼, ENT)