Comtech EF Data SMS-758 - Manual (Page 109)

SMS-758 Modem Protection Switch Theory of Operation
MN/SMS758 Rev. 3 4–49
OUTPUTS
BU MOD 2
IF 1
IF 2
IF 3
IF 4
MOD 1
MOD 2
MOD 3
MOD 4
INPUTS
BACKUP DEMOD 2
DOWNLINK 4
DOWNLINK 3
DOWNLINK 2
DOWNLINK 1
IF 5
IF 6
IF 7
IF 8
BU MOD 1
MOD 5
MOD 6
MOD 7
MOD 8
INPUTS
INPUTS
BACKUP DEMOD 1
DEMODULATOR SWITCH
DOWNLINK 4
DOWNLINK 3
DOWNLINK 2
DOWNLINK 1
DEMODULATOR SWITCH
BACKUP 2 IF OUTPUT
BACKUP 1 IF OUTPUT
Figure 4-21. IF Switch Block Diagram