The receivers get manual tune inputs from the navigation (NAV) control panels.
The VOR/LOC antenna and the localizer antenna send localizer signals through the localizer antenna switches to the MMRs. The localizer antenna switches select the VOR/LOC antenna or the localizer antenna as the source of RF input to the MMR. The glideslope antenna sends glideslope signals to the multi mode receivers.
The multi-mode receivers send ILS deviation data to these LRUs:
· DEUs
· REU
· GPWC
· FCC
· FDAU
· FMC
· Standby attitude indicator.