Comtech EF Data SLM-5650A Installation And Operation Manual page 188

SLM-5650A Satellite Modem
Network Processor (NP) Interface
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
Selection
Viterbi (standard)
None (standard)
Turbo (optional)
Selection
BPSK
QPSK
OQPSK
8PSK
16QAM (optional)
Selection
Viterbi
Uncoded
Turbo
Enter the Receive Data Rate (in kbps).
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).
Select
Normal
Invert
Select
V.35
Modified-V.35
FEC Type
Description
K=7 convolutional encoder.
Uncoded.
Turbo means Turbo Product Code, which is a block code.
Demodulation Type
Description
Bi Phase Shift Keying
Quadrature Phase Shift Keying.
Offset Quadrature Phase Shift Keying.
8 Phase Shift Keying
16 Quadrature Amplitude Modulation.
FEC Code Rate
Description
1/2, 2/3, 3/4, 5/6, or 7/8
1/1
5/16, 21/44, 3/4, 7/8, or 17/18
Data Rate (kbps)
Frequency (MHz)
Spectrum
Description
Used to counteract frequency converters that invert the spectrum
Descrambler (for energy dispersal)
Description
ITU standard
Comtech EF Data Closed Network with Reed Solomon compatible (modified V.35)
8–26
Revision 8
MN-SLM5650A