Table of Contents
Advertisement
CDM-Qx Satellite Modem
Front Panel Operation
IMPORTANT
FEC Type
Viterbi
Viterbi + R-S
TCM + R-S
TPC
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.
(Config%Rx%Freq) – RX FREQUENCY
Rx IF Freq: 1156.3456 MHz
The range of frequencies depends upon the plug-in module – the preceeding example
shows the L-Band version of the CDM-Qx. Edit the receive frequency by selecting the
digit to be edited, using the !" arrow keys. The value of the digit is then changed using
the #$ arrow keys, then pressing
If (using the ODU, LNB menus) the user has selected an LNB LO frequency (other than
zero) and defined whether the mix is high side or low side, the display will be modified
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.
Modulation
BPSK
QPSK
BPSK
QPSK
16-QAM
8-PSK
BPSK
QPSK
8-PSK
16-QAM
(◄ ►, ▲ ▼,ENT)
Code Rate
Data Rate Range
Rate 1/2
32 kbps to 5 Mbps
Rate 1/2
32 kbps to 10 Mbps
Rate 3/4
32 kbps to 15 Mbps
Rate 7/8
32 kbps to 17.5 Mbps
Rate 1/2
32 kbps to 4.5 Mbps
Rate 1/2
32 kbps to 9.1 Mbps
Rate 3/4
32 kbps to 13.7 Mbps
Rate 7/8
32 kbps to 16 Mbps
Rate 3/4
349.1 kbps to 20 Mbps
Rate 7/8
407.3 kbps to 20 Mbps
Rate 2/3
232.7 kbps to 18.3 Mbps
Rate 5/16
32 kbps to 3.1 Mbps
Rate 21/44
32 kbps to 4.7 Mbps
Rate 21/44
32 kbps to 9.5 Mbps
Rate 3/4
32 kbps to 15 Mbps
Rate 7/8
32 kbps to 17.5 Mbps
Rate 17/18
32 kbps to 18.888 Mbps
Rate 3/4
288 kbps to 20 Mbps
Rate 7/8
336 kbps to 20 Mbps
Rate 17/18
362.7 kbps to 20 Mbps
Rate 3/4
384 kbps to 20 Mbps
Rate 7/8
448 kbps to 20 Mbps
.
ENTER
5–24
Revision 6
MN/CDMQx.IOM
EDMAC limited?
Yes – see note below
Yes – see note below
Yes – see note below
Yes – see note below
No
Advertisement
Table of Contents
