Mocomtech CDM-QX - Manual (Page 82)

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 kbps to 5 Mbps
Yes – see
IMPORTANT
NOTE
(below)
QPSK
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
Vit+RS (Viterbi
+Concatenated Reed-
Solomon)
BPSK Rate 1/2 32 kbps to 4.5 Mbps
Yes – see
IMPORTANT
NOTE
(below)
QPSK
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
16-QAM
Rate 3/4 349.1 kbps to 20 Mbps
Rate 7/8 407.3 kbps to 20 Mbps
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 kbps to 3.1 Mbps
Yes – see
IMPORTANT
NOTE
(below)
Rate 21/44 32 kbps to 4.7 Mbps
QPSK
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
8-PSK
Rate 3/4 288 kbps to 20 Mbps
No
Rate 7/8 336 kbps to 20 Mbps
Rate 17/18 362.7 kbps to 20 Mbps
16-QAM
Rate 3/4 384 kbps to 20 Mbps
Rate 7/8 448 kbps to 20 Mbps
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.