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CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier®
Front Panel Operation
5.7.2
INFO: Tx
Tx: 1140.000 05000.000 TUR
8P 17/18 S EXT -20.0 ON
This screen provides Transmit Configuation Information. Per this example, note the following:
Top Line
Bottom Line
Use the
arrow keys to display this second page of information:
Tx: C N N 35
Per this example, note the following:
Top Line
Bottom Line
•
1140.000 05000.000 = 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)
•
TUR = FEC Encoder type (VIT = Viterbi, VRS=Viterbi + Reed-Solomon, TCM =
Trellis Coded + Reed-Solomon, TUR = Turbo)
•
8P = Modulation Type (Q = QPSK, B = BPSK, 8P = 8-PSK, 16=16-QAM)
•
17/18 = Code Rate (2144 = 21/44, then 5/16, 1/2, 2/3, 3/4, 7/8, 17/18)
•
S = Scrambler state (S = Scrambler on, N = Scrambler off, I=IESS-315)
•
EXT = Clocking Mode (INT = internal, EXT = external, LOP = loop, ELP=external loop)
•
-20.0 = Output Power level
•
ON = (ON = on, OF = off, EO= external off)
•
N = TSI State (I = Transmit Spectral Inversion on, N = off)
•
C = Reed-Solomon code rates (C=Comtech (220,200), E=EF Data (225,205),
I=IESS-310 (219,201)
•
N = Tx Clock Inversion (N=Normal, I=Inverted)
•
N = Tx Data Inversion (N=Normal, I=Inverted)
•
35 = Tx Roll-Off (α) factor (20=20% roll-off, 35=35% roll-off)
▲▼ Page navigation mnemonic
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Revision 7
MN/CDMQX.IOM
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