CDM-Qx Satellite Modem

Revision 5

Front Panel Operation

MN/CDMQx.IOM

(Config„Rx„Data) – RX DATA RATE

Rx Data Rate: 05000.000kbps

Sym:02500.000ksps

In QDI mode, these data rates are read-only! The data rate will be the sum of the tributary rates for all ports. This will also show the calculated symbol rate and Nx64kbps (where N=001 to 124).

 

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

IMPORTANT

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.

 

 

 

 

 

 

FEC Type

 

Modulation

Code Rate

Data Rate Range

EDMAC limited?

Viterbi

 

BPSK

Rate 1/2

32 kbps to 5 Mbps

Yes – see note below

 

 

 

 

 

 

Viterbi

 

QPSK

Rate 1/2

32 kbps to 10 Mbps

Yes – see note below

 

 

 

 

 

 

Viterbi

 

QPSK

Rate 3/4

32 kbps to 15 Mbps

Yes – see note below

 

 

 

 

 

 

Viterbi

 

QPSK

Rate 7/8

32 kbps to 17.5 Mbps

Yes – see note below

 

 

 

 

 

 

Viterbi + R-S

 

BPSK

Rate 1/2

32 kbps to 4.5 Mbps

Yes – see note below

 

 

 

 

 

 

Viterbi + R-S

 

QPSK

Rate 1/2

32 kbps to 9.1 Mbps

Yes – see note below

 

 

 

 

 

 

Viterbi + R-S

 

QPSK

Rate 3/4

32 kbps to 13.7 Mbps

Yes – see note below

 

 

 

 

 

 

Viterbi + R-S

 

QPSK

Rate 7/8

32 kbps to 16 Mbps

Yes – see note below

 

 

 

 

 

 

Viterbi + R-S

 

16-QAM

Rate 3/4

349.1 kbps to 20 Mbps

Yes – see note below

 

 

 

 

 

 

Viterbi + 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

 

 

 

 

 

 

TPC

 

BPSK

Rate 5/16

32 kbps to 3.1 Mbps

Yes – see note below

 

 

 

 

 

 

TPC

 

BPSK

Rate 21/44

32 kbps to 4.7 Mbps

Yes – see note below

 

 

 

 

 

 

TPC

 

QPSK

Rate 21/44

32 kbps to 9.5 Mbps

Yes – see note below

 

 

 

 

 

 

TPC

 

QPSK

Rate 3/4

32 kbps to 15 Mbps

Yes – see note below

 

 

 

 

 

 

TPC

 

QPSK

Rate 7/8

32 kbps to 17.5 Mbps

Yes – see note below

 

 

 

 

 

 

TPC

 

QPSK

Rate 17/18

32 kbps to 18.888 Mbps

Yes – see note below

 

 

 

 

 

 

TPC

 

8-PSK

Rate 3/4

288 kbps to 20 Mbps

No

 

 

 

 

 

 

TPC

 

8-PSK

Rate 7/8

336 kbps to 20 Mbps

No

 

 

 

 

 

 

TPC

 

8-PSK

Rate 17/18

362.7 kbps to 20 Mbps

No

 

 

 

 

 

 

TPC

 

16-QAM

Rate 3/4

384 kbps to 20 Mbps

No

 

 

 

 

 

 

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.

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Mocomtech CDM-QX operation manual Config„Rx„Data RX Data Rate, Rx Data Rate 05000.000kbps Sym02500.000ksps