Comtech EF Data SMS-458B - Manual (Page 82)

SMS-458B Modem Protection Switch Revision 2
Theory of Operation MN/SMS458B.IOM
4–22
INPUTS OUTPUTS BU MOD 1
IF 1
IF 2
IF 3
BACKUP DEMOD 1
IF 4
MOD 1
MOD 2
MOD 3
MOD 4
BACK-UP 1 IF OUTPUT
DEMODULATOR SWITCH
DOWNLINK 4
DOWNLINK 3
DOWNLINK 2
DOWNLINK 1
DEMODULATOR SWITCH
Figure 4-9. IF Switch