Comtech EF Data CDM-Qx, Инструкция по установке и эксплуатации

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CDM-Qx Satellite Modem Revision 6
Front Panel Operation MN/CDMQx.IOM
FEC Type Modulation Code Rate Data Rate Range EDMAC limited?
BPSK Rate 1/2 32 kbps to 5 Mbps
Rate 1/2 32 kbps to 10 Mbps
Rate 3/4 32 kbps to 15 Mbps
Viterbi
QPSK
Rate 7/8 32 kbps to 17.5 Mbps
Yes – see note below
BPSK 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
QPSK
Rate 7/8 32 kbps to 16 Mbps
Rate 3/4 349.1 kbps to 20 Mbps
V 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
Rate 5/16 32 kbps to 3.1 Mbps
BPSK
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
QPSK
Rate 17/18 32 kbps to 18.888 Mbps
Yes – see note below
Rate 3/4 288 kbps to 20 Mbps
Rate 7/8 336 kbps to 20 Mbps 8-PSK
Rate 17/18 362.7 kbps to 20 Mbps
Rate 3/4 384 kbps to 20 Mbps
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.
(Config
%
Tx
%
Freq) – TX IF FREQUENCY
Tx IF Freq: 1156.3456 MHz
( ◄ ► , ▲ ▼ , ENT)
The range of frequencies depends upon the plug-in module – the preceeding example
shows the L-Band version of modem. Edit the Transmit IF 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
ENTER
.
If (using the
ODU, BUC
menus) the user has selected a BUC LO frequency (other than
zero) and defined whether the mix is high side or low side, the display will be modified
as shown below, to include the calculated Transmit RF frequency of the modem/BUC
combination:
Tx IF Freq: 1156.3456 MHz
RF=14156.3456 ( ◄ ►▲ ▼ ENT)
As the Tx IF frequency is edited, the RF frequency will automatically be updated.
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