Comtech EF Data SNM-1000 - Manual (Page 76)

SNM-1000 Node Control Modem Revision 3
Operation MN/SNM1000.IOM
3–34
3.4.5.2.3 DEMODULATOR:DECODER TYPE
DECODER TYPE
VITERBI
Decoder type selection. Select VITERBI or SEQUENTIAL decoder type.
Notes:
1. Change in EFD, ASYNC, or Custom modem types only.
2. A Sequential Decoder Type and a 3/4 Code Rate combination is
not compatible with a CSC CLOSED Modulator Type.
Press[
←], [→], [↑], or [↓] to move the flashing cursor. Press [ENTER] to execute the
change.
3.4.5.2.4 DEMODULATOR:RX BPSK ORDERING
RX BPSK ORDERING
STANDARD
Receive BPSK bit ordering selection. Select STANDARD or NON-STANDARD
Press[
←], [→], [↑], or [↓] to move the flashing cursor. Press [ENTER] to execute the
change.
3.4.5.2.5 DEMODULATOR:DEMOD SPECTRUM
DEMOD SPECTRUM
NORMAL
Programmable vector rotation allows the operator to select NORMAL or INVERT for
spectrum reversal of the I and Q baseband channels.
Press[
←], [→], [↑], or [↓] to move the flashing cursor. Press [ENTER] to execute the
change.