Comtech EF Data CDM-570 - Manual (Page 109)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Front Panel Operation MN/CDM570L.IOM
5–23
5.2.2.1.4.4 (CONFIG: Rx) Data (Data Rate)
Rx Dat Rate:5000.000kbps
2500.000ksym (◄ ►,▲ ▼,ENT)
1. Overall range of data rates is from 2.4 to 9980 kbps. Overall range of symbol
rates is 4.8 to 2500 ksymbols/second. Minimum and maximum data rates are
dependent on modulation type and FEC encoder rate. If the modulation or
FEC is changed and the currently selected data rate can no longer be
supported, then the data rate will be adjusted automatically, up or down,
keeping the symbol rate constant. The bottom line of the display shows
symbol rate, based on FEC type, modulation, FEC Code Rate, and Data Rate.
2. If the current interface type is selected to be G.703, the data rate will be set
either to 1544 (T1) or 2048 kbps (E1).
3. * IMPORTANT: Where noted in the following table, 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.
FEC Type Modulation Code Rate Data Rate Range EDMAC limited?
None
BPSK Uncoded 4.8 kbps to 3.000 Mbps
*Yes – See preceding
IMPORTANT note
QPSK/OQPSK Uncoded 9.6 kbps to 5.000 Mbps
Viterbi
BPSK Rate 1/2 2.4 kbps to 1.500 Mbps
QPSK/OQPSK
Rate 1/2 4.8 kbps to 3.000 Mbps
Rate 3/4 7.2 kbps to 4.500 Mbps
Rate 7/8 8.4 kbps to 5.250 Mbps
Viterbi + RS
BPSK Rate 1/2 2.4 kbps to 1.363 Mbps
QPSK/OQPSK
Rate 1/2 4.3 kbps to 2.727 Mbps
Rate 3/4 6.5 kbps to 4.091 Mbps
Rate 7/8 7.5 kbps to 4.666 Mbps
16-QAM
Rate 3/4 13.0 kbps to 4.000 Mbps
Rate 7/8 16.8 kbps to 4.666 Mbps
TCM + RS 8-PSK Rate 2/3 8.7 kbps to 4.400 Mbps
Turbo
BPSK
Rate 5/16 2.4 kbps to 0.937 Mbps
Rate 21/44 2.4 kbps to 1.430 Mbps
QPSK/OQPSK
Rate 21/44 4.8 kbps to 2.860 Mbps
Rate 3/4 7.2 kbps to 4.500 Mbps
Rate 7/8 8.4 kbps to 5.250 Mbps
Rate 0.95 9.1 kbps to 5.666 Mbps
8-PSK/8-QAM
Rate 3/4 10.8 kbps to 6.750 Mbps
No
Rate 7/8 13.6 kbps to 7.875 Mbps
Rate 0.95 15.3 kbps to 8.500 Mbps
16-QAM
Rate 3/4 14.4 kbps to 9.000 Mbps
Rate 7/8 16.8 kbps to 9.980 Mbps