Filter
Top Products
CDM-Qx Satellite Modem Revision 5
Front Panel Operation MN/CDMQx.IOM
5–67
5.6.4.2 (InfoTx) - TX INFORMATION
The information displayed here is as follows:
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:
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)
Tx: 1140.000 05000.000 TU
R
8P 17/18 S EXT -20.0 ON N ▲▼
Tx: C N N 35
▲▼