R Post SB 34-1147 For A/C 001-004,051-060,
ILS ((MMR)) - DESCRIPTION AND OPERATION
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1. General
_______ The primary function of the Multi-Mode Receiver (MMR) is to receive and process Instrument Landing System (ILS) and Global Positioning System (GPS) signals. The MMR is a navigation sensor with two internal receivers.
A. ILS Receiver The function of the ILS is to provide the crew and airborne system users with lateral (LOC) and vertical (G/S) deviation signals, with respect to the approach ILS radio beam transmitted by a ground station. The localizer operates in a frequency band which ranges from 108.1 MHz to
111.95 MHz and the glide uses the band from 329.15 MHz to 335 MHz as defined by ARINC specification 710.
B. GPS Receiver The GPS is a radio aid to worldwide navigation which provides:
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the crew with a readout of accurate navigation information, e.g. position, track and speed
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the Flight Management and Guidance Computer (FMGC) with position information, after hybridization in the Air Data/Inertial Reference Unit (ADIRU) with inertial parameters, for accurate position fixing.
2. Component Location
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(Ref. Fig. 001)
The MMR system units are located in the aircraft as follows.
-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF.
-------------------------------------------------------------------------------40RT1 MMR-1 95VU 120 811 34-36-31 40RT2 MMR-2 96VU 120 811 34-36-31 3RT ANTENNA-LOCALIZER 1/2 110 110AL 34-36-11 4RT ANTENNA-GLIDE/SLOPE 1/2 110 110AL 34-36-18 43RT1 ANTENNA-GPS ACTIVE, 1 210 831 34-36-16 43RT2 ANTENNA-GPS ACTIVE, 2 210 831 34-36-16
1EFF : ALL 1 34-36-00Page 1 1 1 Config-2 May 01/05 1 1 1CES 1
MMR - Component Location
Figure 001
R 1EFF : ALL 1 34-36-00Page 2 1 1 Config-2 Nov 01/00 1 1 1CES 1 1EFF : ALL 1 34-36-00Page 3 1 1 Config-2 Aug 01/03 1 1 1CES 1
R 3. System Description__________________ (Ref. Fig. 002, 003) The A/C comprises two independent MMRs, 40RT1 and 40RT2, linked to: - a common localizer antenna 3RT
R - a common glide/slope antenna 4RT - a GPS active antenna 43RT1 (linked to MMR1) - a GPS active antenna 43RT2 (linked to MMR2).
R R R R R R R R R R A. ILS Operation The equipment given below can control the ILS operation: - the Multipurpose Control and Display Units (MCDU) and the Flight Management and Guidance Computers (FMGC) for frequency/course selection in normal operating mode. - the Radio Management Panels (RMPs) for frequency/course selection in back-up mode. The ILS data are shown on the EFIS displays: - the CAPT Primary Flight Display (PFD) and F/O Navigation Display (ND) show the deviations from the ILS1.
R R R R R - the F/O PFD and CAPT ND show the deviations from the ILS2. The Morse-coded audio identification signals are sent to the Audio Management Unit (AMU). These signals can be heard in the boomset and on the loudspeaker according to the selection by the crew on the Audio Control Panel (ACP).
B. GPS Operation
(1) Normal operation In normal operation, the GPS 1 data are used by the ADIRUs 1 and 3; the GPS 2 data by the ADIRU 2.
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