Product specifications

CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier® Revision 7
Front Panel Operation MN/CDMQX.IOM
5–16
Note the following:
FEC Type Modulation Code Rate Data Rate Range EDMAC limited?
Vit (Viterbi)
BPSK Rate 1/2 32 kb
p
s to 5 Mb
p
s
Yes – see
IMPORTANT
NOTE (below)
QPSK
Rate 1/2 32 kb
p
s to 10 Mb
p
s
Rate 3/4 32 kb
p
s to 15 Mb
p
s
Rate 7/8 32 kb
p
s to 17.5 Mb
p
s
Vit+RS (Viterbi
+Concatenated Reed-
Solomon)
BPSK Rate 1/2 32 kb
p
s to 4.5 Mb
p
s
Yes – see
IMPORTANT
NOTE (below)
QPSK
Rate 1/2 32 kb
p
s to 9.1 Mb
p
s
Rate 3/4 32 kb
p
s to 13.7 Mb
p
s
Rate 7/8 32 kb
p
s to 16 Mb
p
s
16-QAM
Rate 3/4 349.1 kb
p
s to 20 Mb
p
s
Rate 7/8 407.3 kb
p
s to 20 Mb
p
s
TCM+RS (Trellis Coded
Modulation +
Concatenated Reed-
Solomon)
8-PSK Rate 2/3 232.7 kbps to 18.3 Mbps
Yes – see
IMPORTANT
NOTE (below)
TPC (Turbo)
BPSK
Rate 5/16 32 kb
p
s to 3.1 Mb
p
s
Yes – see
IMPORTANT
NOTE (below)
Rate 21/44 32 kb
p
s to 4.7 Mb
p
s
QPSK
Rate 21/44 32 kb
p
s to 9.5 Mb
p
s
Rate 3/4 32 kb
p
s to 15 Mb
p
s
Rate 7/8 32 kb
p
s to 17.5 Mb
p
s
Rate 17/18 32 kb
p
s to 18.888 Mb
p
s
8-PSK
Rate 3/4 288 kb
p
s to 20 Mb
p
s
No
Rate 7/8 336 kb
p
s to 20 Mb
p
s
Rate 17/18 362.7 kb
p
s to 20 Mb
p
s
16-QAM
Rate 3/4 384 kb
p
s to 20 Mb
p
s
Rate 7/8 448 kb
p
s to 20 Mb
p
s
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.
5.4.2.5 CONFIG: Tx Æ Freq
Tx IF Freq: 1156.3456 MHz
(◄ ►,▲ ▼,ENT)
For the Transmit IF Frequency, 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
first using the
W X arrow keys to select the digit to be edited; the value of the digit is then
changed using the
ST arrow keys. Press ENTER when done.
When using the ODU Æ BUC menus, if the user has selected a BUC LO frequency other than
zero, and has 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.