Comtech EF Data SNM-1001L - Manual (Page 247)

SNM-1001L Satellite Modem Revision 1
Specifications MN/SNM1001L.IOM
A–9
A.5.9 Differential Encoder
The differential encoder takes care of one set of ambiguities due to the error correction
codes being transparent.
• On or off
A.5.10 BPSK Bit Ordering
The encoder has the ability to select whether I is the first bit or Q is the first bit in the
symbol word grouping for compatibility with any system. For standard operation Q is the
first bit.
• Viterbi (Standard/Non-Standard)
• Sequential (Standard/Non-Standard)
• Turbo – Fixed order only
A.5.11 Interleaver (Reed-Solomon Codec)
• Offset QPSK, QPSK - Depth 4 (IBS, IDR, D&I)
• 8-PSK - Depth 4 (No Overhead, IBS, D&I) (IESS-310)
• Depth 8 (Closed Network, Async)
• 8PSK - Depth 8 (IDR) (IESS-310)
A.5.12 Modulator Transmit Frequency (IF)
The range of the output IF the operator from 950 to 1750 MHz in 100 Hz steps can select
spectrum.
A.5.13 Transmit Frequency Change Time
The time between the end of a remote command and the end of the modem reply for
frequency change and synthesizer lock will be < 500 ms
A.5.14 Modulator Transmit IF Output Switch
When set to off, no signal present at the output is greater than -60 dBm, measured in a
4 kHz bandwidth from 55 MHz to 2.4 GHz.
A.5.15 Modulator Transmit IF Power
The TX IF power is operator selectable from 0 to -40 dBm, in 0.1 dB steps, with an
accuracy of
± 1.5 dB. The maximum drift from room temperature value over the specified
temperature range is ± 1.0 dB.