5 config: rx ( freq, 5 config: rx æ freq – Mocomtech CDM-QX User Manual

Page 90

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CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier®

Revision 7

Front Panel Operation

MN/CDMQX.IOM

5–24

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.

5.4.3.5 CONFIG: Rx

Æ Freq

Rx IF Freq: 1156.3456 MHz

(◄ ►,▲ ▼,ENT)

For the Receive 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 LNB menus, if the user has selected an LNB 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 Receive RF frequency of the modem/LNB combination:

Rx IF Freq: 1156.3456 MHz
RF=14156.3456 (◄ ►▲ ▼ ENT)

As the Rx IF frequency is edited, the RF frequency will automatically be updated.

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