Comtech EF Data SLM-5650A - Manual (Page 188)

SLM-5650A Satellite Modem Revision 8
Network Processor (NP) Interface MN-SLM5650A
8–26
When entering an IF frequency, the M&C will check the occupied bandwidth
calculated from the data rate, modulation type, code rate and overhead and will not
allow an IF frequency to be entered if the occupied bandwidth falls outside of the
minimum or maximum IF frequencies.
Click [Transmit Submit] to save the desired configuration settings.
Receive
FEC Type
Selection Description
Viterbi (standard) K=7 convolutional encoder.
None (standard) Uncoded.
Turbo (optional) Turbo means Turbo Product Code, which is a block code.
Demodulation Type
Selection Description
BPSK Bi Phase Shift Keying
QPSK Quadrature Phase Shift Keying.
OQPSK Offset Quadrature Phase Shift Keying.
8PSK 8 Phase Shift Keying
16QAM (optional) 16 Quadrature Amplitude Modulation.
FEC Code Rate
Selection Description
Viterbi 1/2, 2/3, 3/4, 5/6, or 7/8
Uncoded 1/1
Turbo 5/16, 21/44, 3/4, 7/8, or 17/18
Data Rate (kbps)
Enter the Receive Data Rate (in kbps).
Frequency (MHz)
Enter a Frequency (70/140 MHz) 52-88, 104-176 MHz (in 100 Hz steps) or (L-Band) 950-2000 MHz (in 100 Hz steps).
Spectrum
Select Description
Normal
Used to counteract frequency converters that invert the spectrum
Invert
Descrambler (for energy dispersal)
Select Description
V.35 ITU standard
Modified-V.35 Comtech EF Data Closed Network with Reed Solomon compatible (modified V.35)