**ON A/C 001-049, 051-099, 101-105,
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The RMP1(2) COM BUS 1 delivers the VHF1 and HF1 (if fitted) frequencies.
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The RMP2 COM BUS 1 delivers the VHF3 frequencies.
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Radio Communication - Normal Configuration Figure 009
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R **ON A/C 106-149, 151-199, 201-299, 301-399, 401-499,
-The RMP1(2) COM BUS 1 delivers the VHF1, VHF3 (if fitted) and HF1 (if fitted) frequencies.
**ON A/C ALL
-The RMP2(1) COM BUS 2 delivers the VHF2 and HF2 (if fitted)
frequencies. Each transceiver receives the appropriate output bus from the RMP1 and RMP2. The transceiver only takes into account one of the two signals (depending on the status of a discrete received from the RMP1 or 2). In addition, the RMP1 or the RMP2 (set to OFF) can be made transparent for the RMP3 (its output buses are linked to the RMP1 and RMP2 only). In the event of failures of one or two RMPs, the reconfigurations are possible to control the radio communication equipment. (Ref. Fig. 010)
B. Radio-Navigation Back-Up Mode This mode is selected in the event of failure of both FMGCs, on the RMP1 and the RMP2 only. In addition to normal mode functions it also enables the frequency control of the radio navigation equipment :
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On Captain side (VOR1, DME1, ILS1, ADF1(*)) for the RMP1
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On First Officer side (VOR2, DME2, ILS2, ADF2(*)) for the RMP2.
(*) if installed (Ref. Fig. 011) The RMP1 and the RMP2 transmit on a dedicated output bus the frequencies to the radio navigation equipment. In addition, the RMP1 (RMP2) receives the FMGC1 (FMGC2) management bus. In normal mode, these input and output are directly interconnected by means of internal relays. The RMP is thus transparent to the onside FMGC. In radio-navigation back-up mode, the output bus transmits frequencies generated by the RMP. Each radio-navigation system receives the output bus from the onside RMP and the management bus from the offside FMGC. Only one input is taken into account according to the status of a discrete received from the RMP. This enables reconfigurations in case of failure of one or two FMGCs. (Ref. Fig. 012) The RMP1 and the RMP2 exchange, through the dialogue buses, the frequency and the course for the ILS: the selected values are identical for the ILS1 and the ILS2 at selection of the back-up mode on the RMP1 and the RMP2.
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Radio Communication - Reconfiguration Figure 010 (SHEET 1)
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Radio Communication - Reconfiguration Figure 010 (SHEET 2)
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Radio Communication - Reconfiguration Figure 010 (SHEET 3)
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Radio Navigation - Normal Configuration Figure 011
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Radio Navigation - Reconfiguration Figure 012 (SHEET 1)
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Radio Navigation - Reconfiguration Figure 012 (SHEET 2)
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The ILS course and frequency are the only radio-navigation data exchanged through the dialogue buses.
7. Interface
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A. Connection with the Centralized Fault Display System (CFDS)
The RMP1 is linked to the CFDS by means of two buses:
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The RMP1 receives a bus from the CFDIU which transmits general parameters (UTC, date, flight phase etc.) and interrogations (selection of the menu mode, etc.).
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The RMP1 then transmits these data to the RMP2 and the RMP3 through its output dialogue bus.
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The RMP1 output bus sent to the VHF1 (and VHF3 and HF1 if installed) is also connected to the CFDIU. In addition to VHF1 (and VHF3 and HF1 if installed) frequencies, the RMP1 transmits system maintenance data through this bus.
When the CFDIU interrogates the RMP2 or the RMP3, the interrogated RMP
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