CDM-Qx Satellite Modem

Revision 5

Front Panel Operation

MN/CDMQx.IOM

5.6.4.2(Info„Tx) - TX INFORMATION

The information displayed here is as follows:

Tx: 1140.000 05000.000 TUR

8P 17/18 S EXT -20.0 ON N ▲▼

Top line:

Transmit 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 Encoder type (VIT = Viterbi, VRS=Viterbi + Reed-Solomon, TCM = Trellis Coded + Reed-Solomon, TUR = Turbo)

Bottom line:

Modulation 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) Scrambler state (S = Scrambler on, N = Scrambler off, I=IESS-315)

Clocking Mode (INT = internal, EXT = external, LOP = loop, ELP=external loop) Output Power level

Transmit Output State (ON = on, OF = off, EO= external off) TSI State (I = Transmit Spectral Inversion on, N = off)

Using ▲▼ arrow keys will display the following information:

Tx: C N N 35

▲▼

Top line:

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

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

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

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

5–67

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Mocomtech CDM-QX operation manual Info„Tx TX Information, Tx 1140.000 05000.000 TUR 8P 17/18 S EXT -20.0 on N, Tx C N N