Comtech EF Data CDM-570 - Manual (Page 101)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Front Panel Operation MN/CDM570L.IOM
5–15
5.2.2.1.3.4 (CONFIG: Tx) Data (Data Rate)
Tx Dat Rate: 5000.000kbps
3000.000ksym (◄ ►,▲ ▼,ENT)
1. The overall range of data rates is from 2.4 to 9980 kbps. The overall range of
symbol rates is from 4.8 to 3000 ksymbols/second. The minimum and
maximum data rates are dependent on modulation type and FEC encoder
rate. If user changes the modulation or FEC, 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 the symbol rate, based on FEC type, modulation,
FEC Code Rate, and Data Rate. The valid ranges of data rate are shown in
the table below.
2. If the current interface type is selected to be G.703, the data rate will be
automatically set to either 1544 kbps (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