CDM-Qx Satellite Modem

Revision 5

Front Panel Operation

MN/CDMQx.IOM

5.6.4.3(Info„Rx) – RX INFORMATION

The information displayed here is as follows:

Rx: 1140.000 05000.000 TUR

8P 17/18 D RX BUF +/-32k N ▲▼

Top line:

Receive Frequency and Data Rate (NOTE: Due to space limitations, the resolution of displayed frequency is limited to 1 kHz, and data rate to 10Hz,)

FEC Decoder type (VIT = Viterbi, SEQ = Sequential, VRS=Viterbi + Reed-Solomon, SRS=Sequential + Reed Solomon, TCM = Trellis Coded + Reed-Solomon, TUR = Turbo)

Bottom line:

Demodulation type (Q = QPSK, B = BPSK, 8P = 8-PSK, 16=16-QAM).

Code Rate (2144 = 21/44, then 5/16, 1/2, 2/3, 3/4, 7/8, 17/18)

Descrambler state (D = Descrambler on, N = Descrambler off)

Buffer Source (IN = internal, RX = Rx satellite, TT = Tx terrestrial)

Buffer Clocking Mode (SAT = buffer disabled, BUF = buffer enabled)

Demod Sweep Acquisition range

RSI state (I = Receive Spectral Inversion on, N = off)

Using ▲▼ arrow keys will display the following information:

Rx: C N N 35

▲▼

Top line:

Reed-Solomon code rates (C=Comtech(220,200), E=EF Data(225,205), I=IESS- 310(219,201).

Rx Clock Inversion (N=Normal, I=Inverted).

Rx Data Inversion (N=Normal, I=Inverted).

Rx Roll-Off (α) factor (20=20% roll-off, 35=35% roll-off)

5–68

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Mocomtech CDM-QX operation manual Info„Rx RX Information, Rx 1140.000 05000.000 TUR 8P 17/18 D RX BUF +/-32k N, Rx C N N