RADIO MANAGEMENT - DESCRIPTION AND OPERATION

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1. General
The Radio Management Panels (RMP) centralize the radio communication (Very High Frequency (VHF) and High Frequency (HF)) frequency control.
They can also serve as backups of the flight management and guidance computers (FMGC) for radio navigation frequencies control (VOR/DME, LS, ADF(if installed)).
They can also serve as backups of the flight management and guidance computers (FMGC) for radio navigation frequencies control (VOR/DME, ILS, GLS (if activated), MLS (if activated), ADF(if installed)).
The aircraft is equipped with three RMPs which are identical and interchangeable.
The aircraft is equipped with two RMPs which are identical and interchangeable.
Full provision for a third RMP is installed on the aircraft.

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2. Component Location

Radio Management - Component Location ** ON A/C NOT FOR ALL

FIN	FUNCTIONAL DESIGNATION	PANEL	ZONE	ATA REF
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3CA3	MCDU-3	101VU	211	22-82-12
** ON A/C ALL
3CA1	MCDU-1	11VU	210	22-82-12
3CA2	MCDU-2	11VU	210	22-82-12
1RG1	RMP-COM/NAV FREQ SEL, 1	11VU	210	23-13-13
1RG2	RMP-COM/NAV FREQ SEL, 2	11VU	210	23-13-13
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1RG3	RMP-COM FREQ SEL, 3	20VU	210	23-13-13

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3. System Description

Radio Management - Communication Architecture

Radio Management - Navigation Architecture ** ON A/C NOT FOR ALL

The radio management system is connected to:

The VHF and HF radio-communication equipment (Ref. 23-12 and 23-11)

The VOR, DME, ADF (if installed) and ILS radio-navigation equipment (Ref. 34-55, 34-51, 34-53 and 34-36)
The Flight Management and Guidance Computers (FMGC) (Ref. 22-83)
The Centralized Fault-Display Interface-Unit (CFDIU) (Ref. 31-32)
The Landing Gear Control and Interface Unit (LGCIU) (Ref. 32-31).

The VOR, DME, ADF (if installed) and MMR radio-navigation equipment (Ref. 34-55, 34-51, 34-53 and 34-36)
The Flight Management and Guidance Computers (FMGC) (Ref. 22-83)
The Centralized Fault-Display Interface-Unit (CFDIU) (Ref. 31-32)
The Landing Gear Control and Interface Unit (LGCIU) (Ref. 32-31).

The VOR, DME, ADF (if installed) and MMR radio-navigation equipment (Ref. 34-55, 34-51, 34-53 and 34-36)
The Flight Management and Guidance Computers (FMGC) (Ref. 22-83)
The Air Traffic Service Unit (ATSU) (Ref. 46-21)
The Centralized Fault Display Interface Unit (CFDIU) (Ref. 31-32)
The Landing Gear Control and Interface Unit (LGCIU) (Ref. 32-31).

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4. Electrical Power Supply

Radio Management - System Power Supply ** ON A/C NOT FOR ALL

The RMP1 is supplied with 28VDC from the 28VDC ESS bus 4PP (sub-busbar 401PP) through 3A circuit breaker 2RG1 on the overhead panel 49VU (in the cockpit).
The RMP1 is supplied by the emergency system.
The RMP2 is supplied with 28VDC from the 28VDC bus 2PP (sub-busbar 204PP) through 3A circuit breaker 2RG2 on the rear circuit breaker panel 121VU (in the cockpit).
The RMP3 is supplied with 28VDC from the 28VDC bus 1PP (sub-busbar 103PP) through 3A circuit breaker 2RG3 on the rear circuit breaker panel 121VU (in the cockpit).

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5. Component Description

A. RMP External Description - Front face FIN: 1-RG-1 FIN: 1-RG-2 FIN: 1-RG-3

RMP - Front Face ** ON A/C NOT FOR ALL

Front face features:

Two display windows. These windows have liquid crystal displays (LCD) with a high contrast:
. ACTIVE frequency display for frequencies output by the RMP.
. STBY/CRS (standby/course) display for preset frequencies (and courses for the VOR and the ILS).
A pushbutton switch which permits the transfer of frequencies from one display to the other.

Front face features:

Two display windows. These windows have liquid crystal displays (LCD) with a high contrast:
. ACTIVE frequency display for frequencies output by the RMP.
. STBY/CRS (standby/course) display for preset frequencies or chanel for MLS and GLS and courses for the VOR and the ILS.
A pushbutton switch which permits the transfer of frequencies from one display to the other.

The front face features:

Two display windows. These windows have liquid crystal displays (LCD) with a high contrast:
. ACTIVE frequency display for frequencies output by the RMP.
. STBY/CRS (standby/course) display for preset frequencies or channel for MLS and GLS, and courses for the VOR and the ILS.
A pushbutton switch which permits the transfer of frequencies from one display to the other.
A pushbutton switch with annunciator which permits the loading of frequencies in the STBY/CRS window (if activated).

Five pushbutton switches with selection feedback for the selection of the VHF and HF systems.

A SEL indicator light (amber LED) to indicate the interactions between the different RMPs.
A dual selector knob for the selection of frequency and course.
Two pushbutton switches with selection feedback for the selection of specific modes :

A SEL indicator light (amber LED) to indicate the interactions between the different RMPs.
A dual "turbo tuning" selector knob for the selection of frequency and course proportionally to its rotation speed.
Two pushbutton switches with selection feedback for the selection of specific modes :

A SEL indicator light (amber LED) to indicate the interactions between the different RMPs.
A dual "turbo tuning" selector knob for the selection of frequency and course proportionally to its rotation speed. The widest knob lets also activation or deactivation of BFO mode.
Two pushbutton switches with selection feedback for the selection of specific modes :

.AM pushbutton switch for the HF system
.BFO pushbutton switch for the ADF system (if installed)
.AM pushbutton switch for the HF system
.BFO pushbutton switch for the ADF system (this pushbutton switch is not used on the RMP2) (if installed)
.AM pushbutton switch for the HF system

A pushbutton switch with NAV selection feedback. A Plexiglas guard protects this pushbutton switch. This pushbutton switch lets the selection of the radio-navigation back up mode.

A pushbutton switch with NAV selection feedback for the selection of the standby radio-navigation mode.

Four pushbutton switches with selection feedback for the selection of the radio navigation systems (VOR, ILS, ADF (if installed) and a provision)

Four pushbutton switches with selection feedback for the selection of the radio navigation systems (VOR, ILS, ADF (if installed) and a provision)
The pushbutton switch corresponding to the ADF2 system is not used on the RMP2.

Four pushbutton switches with selection feedback for the selection of the radio navigation systems (VOR, ILS, ADF (if installed) and a provision)
The pushbutton switch corresponding to the ADF2 system is not used on the RMP2.

Five pushbutton switches with selection feedback for the selection of the radio navigation systems (VOR, ILS, ADF (if installed), MLS (if activated), GLS (if activated) and a provision)
ADF1 (if installed) selected on RMP1.
ADF2 (if installed) selected on RMP2.

A latching ON/OFF switch to set the RMP to ON and to OFF.

B. RMP External Description - Back
The back is equipped with a round 55-pin connector.

C. Characteristics - Frequency ranges

RMP - Channelling/Frequency pairing (118.000 to 136.975 MHz) with 8.33 KHz actived ** ON A/C NOT FOR ALL

VHF: 118 to 136.975 MHz
Channel width: 8,33 KHz or 25 KHz according to the pin prog
The KHz figure is not given with 25 KHz spacing.

RMP - Channelling/Frequency pairing (118.000 to 136.975 MHz) with 8.33 KHz actived ** ON A/C NOT FOR ALL

VHF: 118 to 136.975 MHz
Channel width: 8,33 KHz
The KHz figure is not given.

HF: narrow band 2.8 to 23.999 MHz or wide band 2 to 29.999 MHz, according to the pin prog.
Channel width: 1 KHz or 100Hz according to the pin prog.

NOTE: For narrow band, the frequencies between 2 and 2.799 are selectable for operating facilities but the HF transceiver could not be tuned on these frequencies.

ADF: 190 to 1750.5 KHz
Channel width: 0.5 KHz
VOR : 108 to 117.95 MHz
Channel width : 50 KHz
Between 108 and 112 MHz, the VOR frequencies are the ones in which the figure corresponding to the tenths of MHz is even (e.f. 108.00, 108.05, 108.20... 111.85).
All the frequencies from 112 MHz included, which end in 50 KHz are VOR frequencies.
Only the frequencies assigned to the VOR system can be displayed when VOR is selected.
Course : 0 to 359°.
ILS : 108 to 111.95 MHz
Channel width : 50 KHz.
The ILS frequencies are the one in which the figure corresponding to the tenths of MHz is odd (e.f. 108.10, 108.15, 108.30... 111.95).
Only the frequencies assigned to the ILS can be displayed when ILS is selected.
Course : 0 to 359°.

ADF: 190 to 1750.5 KHz
Channel width: 0.5 KHz
VOR : 108 to 117.95 MHz
Channel width : 50 KHz
Between 108 and 112 MHz, the VOR frequencies are the ones in which the figure corresponding to the tenths of MHz is even (e.f. 108.00, 108.05, 108.20... 111.85).
All the frequencies starting from and including 112 MHz, which end in 50 KHz, are VOR frequencies.
Only the frequencies assigned to the VOR system can be displayed when VOR is selected.
Course : 0 to 359°.
ILS : 108 to 111.95 MHz
Channel width : 50 KHz.
GLS : channels between 20001 to 39999
MLS : channels between 500 to 699
The frequencies dedicated to the ILS are the ones in which the figure corresponding to the tenths of MHz is odd (e.f. 108.10, 108.15, 108.30... 111.95).
Only the frequencies assigned to the ILS can be displayed when ILS is selected.
Course : 0 to 359°.

D. Characteristics - Electrical power supply
Power: 27.5VDC
Placard: 5VAC
Selection feedback: 5VAC
Power: 27.5VDC
Placard: 5VAC
Selection feedback: 5VAC

E. Characteristics - Data transmission and reception
The RMP transmits and receives data in compliance with low speed ARINC 429 standards (between 12.5 and 14 kbits/s).
The radio-communication and the radio-navigation equipment receives the frequency and course data through words having a structure and a refresh rate defined in the ARINC characteristics related to these systems.
The RMP transmits and receives data in compliance with low speed ARINC 429 standards (between 12.5 and 14 kbits/s).
The radio-communication and the radio-navigation equipment receives the frequency and course data through words having a structure and a refresh rate defined in the ARINC characteristics related to these systems.

F. Characteristics - Light and display test
This test is initiated when you set the three-position INT LT/ANN LT switch on the overhead panel 25VU in the cockpit to TEST (Ref. 33-10).
During the test:

The displays show 8s on the RMP.
All the selection feed back lights come on.

During the test, the RMP does not take into account selection made on its front face. It transmits the data corresponding to its configuration at the test initiation.
This test is initiated when you set the three-position INT LT/ANN LT switch on the overhead panel 25VU in the cockpit to TEST (Ref. 33-10).
During the test:

The displays show 8s on the RMP
All the selection feed back lights come on.

During the test, the RMP does not take into account any selection made on its front face. It transmits the data corresponding to its configuration at the beginning of the test.

G. Characteristics - Micro power interruption and power supply cut-off
Any micro power interruption less than 200 ms has no influence on the RMP. In the event of power supply cut-off, the RMP memorizes the context. Consequently, the last configuration selected can be restored when the power supply becomes available again.
Any micro power interruption less than 200 ms has no influence on the RMP. In the event of power supply cut-off, the RMP memorizes the context. Consequently, the last configuration selected can be restored when the power supply becomes available again.

H. Operation - General
The RMPs have two modes of operation:

The normal mode (radio communication selection)
The back up mode (radio communication and radio navigation selection).

I. Normal Mode - Frequency selection

RMP - Operation in Normal Mode ** ON A/C NOT FOR ALL

The RMPs control the frequencies of the HF and VHF transceivers.

Selection of the transceiver is accompanied by a selection feedback and the frequencies which have been previously selected and preset appear in the ACTIVE and STBY/CRS display windows respectively.
Only the preset frequency can be modified by means of the dual selector knob.
When the preset frequency corresponds to the desired value, you press the transfer pushbutton to render it active. The displayed values are then changed over and the RMP modifies its output data accordingly.

J. Normal Mode - SEL indicator light
It is possible to control the operating frequency of any transceiver through one RMP. Nevertheless each RMP is more particularly allocated to one or several systems:
If 3 RMPs are installed:

The RMP1 is normally associated with the VHF1 transceiver
The RMP2 is normally associated with the VHF2 transceiver
The RMP3 is normally associated with the VHF3(*), HF1(*) and HF2(*) transceivers.
(* = if installed)

If 2 RMPs are installed:

The RMP1 is normally associated with the VHF1, VHF3(*) and HF1(*) transceivers
The RMP2 is normally associated with the VHF2 and HF2(*) transceivers.
(* = if installed)

Each time the system operates in a different configuration (cross selection), the SEL indicator lights on the two RMPs concerned come on (e.g. when the VHF2 transceiver is selected on the RMP1, the SEL indicator lights on the RMP1 and the RMP2 come on).
In certain configurations, the SEL indicator lights on the three RMPs are on (e.g. selection of the VHF2 transceiver on the RMP1 and selection of the VHF1 transceiver on the RMP3).

K. Normal Mode - AM mode selection
The AM pushbutton switch with selection feedback enables the selection of the AM mode (amplitude modulation) for the HF transceivers.
This pushbutton is inoperative unless an HF transceiver has been previously selected on the same RMP.
The selection is memorized when another system is selected.
The other RMPs take into account this selection through their dialogue buses.
If AM mode is not selected , the default mode is USB.

L. Frequency Pre-Loading
In case of an uplink Voice Contact Information (VCI) message, the ATSU transmits to the RMP the voice frequency included in the uplink and activates the RMP loading function so that the frequency can be loaded in the RMP STBY/CRS window.
The typical case is as follows:

(1) A frequency is sent from the ATC subnetworks to the ATSU through datalink means.

(2) When the frequency is received from the ground station and validated by the ATSU, the ATSU sends the information to the DCDU for display and sends simultaneously to all the RMPs an order to activate the LOAD function.

(3) After reception of this order and according to the selected radio, RMP turns on the LOAD annunciator white light. The LOAD function is active and the RMP is ready to display a frequency if the LOAD pushbutton switch is pushed.

(4) When the operator pushes the LOAD pushbutton switch, the RMP displays the frequency sent by the ATSU on the STBY/CRS window after a blinking effect of 300ms duration.

(5) As far as the ATSU does not send the order to deactivate the LOAD function, the LOAD function remains active in the RMP according to the selected radio. It means that the operator can load the frequency as many times he wants on each RMP (except if DATA is displayed on the STBY/CRS window).

(6) When the ATSU sends to the RMP an order to deactivate the LOAD function, the RMP turns off the LOAD annunciator white light and the LOAD function is deactivated.
The ATSU and the RMPs are interfaced via ARINC 429 buses in order to implement the loading function.
Three buses are defined between ATSU and RMPs:

One bus is used to transmit information from the ATSU to RMPs (ATSU output bus SYS1).
The other buses are dialog buses between the RMPs connected to the ATSU :
one bus from RMP1 called RMP1 bus and another from RMP2 called RMP2 bus.
RMP - ATSU Interface ** ON A/C NOT FOR ALL
The ATSU uses the label 273 in order to inform that a loadable frequency is available or not.

The ATSU transmits to the RMPs:

VHF frequencies via the ARINC 429 labels 030 (for VHF by step of 25Khz) and 047 (for VHF by step of 8.33Khz).
HF frequencies via ARINC 429 labels 205 and 206.

The RMP is now able to display and tune frequency included in the uplink message. In this case, as long as the message is not closed, the ATSU transmits to the RMPs the received frequency and information used to activate the loading capability on the RMPs.
The RMPs use this information to switch on the LOAD annunciator white light so as to indicate that a frequency can be loaded by pressing the LOAD pushbutton switch.

Load and Transfer Function ** ON A/C NOT FOR ALL

When the crew presses that pushbutton switch, this frequency is displayed in the STBY/CRS window of the RMP.
The LOAD command availability is independent of the VCI status.

M. Normal Mode - ON/OFF latching switch
The power supply of each RMP can be switched off by means of the ON/OFF latching switch (OFF position). When the RMP1 or the RMP2 is off, it becomes transparent for the RMP3. The de-activated RMP then directly connects (by means of internal relays) the RMP3 communication buses to the VHF and HF transceivers.
The power supply of each RMP can be switched off by means of the ON/OFF switch (OFF position).

N. Radio-Navigation Back-Up Mode - Mode selection

RMP - Frequency and Course Selection for VOR and ILS ** ON A/C NOT FOR ALL

It is possible to select this mode when you press the NAV pushbutton switch (protected by a grid-type guard to avoid unwanted selections).
The selection is accompanied by a selection feedback.
This selection has no effect on the display (the same radio communication transceiver remains selected) but the values on the RMP radio-navigation output bus are modified. These values are no longer the values delivered by the FMGC but those memorized by the RMP (i.e. values previously selected in radio-navigation back-up mode).
It is not possible to select radio-navigation equipment unless the radio-navigation back-up mode has been previously selected.
It is possible to select this mode when you press the NAV pushbutton switch (protected by a grid-type guard to avoid unwanted selections). This mode must be selected on both RMP.
The selection is accompanied by a selection feedback.
This selection has no effect on the display (the same radio communication transceiver remains selected) but the values on the RMP radio-navigation output bus are modified. These values are no longer the values delivered by the FMGC but those memorized by the RMP (i.e. values previously selected in radio-navigation back-up mode).
It is not possible to select radio-navigation equipment unless the radio-navigation back-up mode has been previously selected.
The selection of this mode is possible only on the RMP1 and the RMP2.

O. Radio-Navigation Back-Up Mode - Frequency and course selection for radio navigation equipment
The selection of a radio navigation system is accompanied by a selection feedback.
The frequency previously selected in radio-navigation back-up mode for this system is displayed.
For the ADF, there is only a selection of frequency. This selection is the same as for the VHF and HF transceivers (if installed) (Ref. para. 5. (3) (a) 1_ Frequency selection).
If ADF 1 is not installed, a hard pin-prog on the RMP will inform this one about "NO ADF" configuration.
This programming must be done on all RMPs. Then the ADF keys shall not be usable on the RMP 1.
In addition a label 040 will be generated by the RMP to inform accordingly the CFDIU and other peripherals.
For the ADF, there is a selection of frequency in the STBY/CRS window, after new frequency selection BFO selection is displayed in the STBY/CRS window. Activation or deactivation of the BFO mode is made by using the widest knob of the dual selector knob. bFo on or bFo oFF indication is displayed according to the selection. This selection is the same as for the VHF and HF transceivers (if installed) (Ref. para. 5. (3) (a) 1_ Frequency selection).
If ADF 1 is not installed, a hard pin-prog on the RMP will inform this one about "NO ADF" configuration.
This programming must be done on all RMPs. Then the ADF keys shall not be usable on the RMP 1.
In addition a label 040 will be generated by the RMP to inform accordingly the CFDIU and other peripherals.
For the VOR and the ILS, there is a selection of frequency and course as described in figure

RMP - Frequency and Course Selection for VOR and ILS ** ON A/C NOT FOR ALL

There is no selection for the DME : the DME receives the VOR and ILS frequencies from the RMP with the corresponding label.
The DME then operates with the DME frequencies associated with the VOR and ILS frequencies.
For the VOR and the ILS, there is a selection of frequency and course as described in figure

RMP - Frequency and Course Selection for VOR and ILS ** ON A/C NOT FOR ALL

P. Radio-Navigation Back-Up Mode - BFO mode selection
A BFO pushbutton switch with selection feedback enables the selection of the BFO mode (Beat Frequency Oscillator) for the ADF system. This pushbutton switch is inoperative unless the ADF has been previously selected.
This selection is memorized when another system is selected.
A BFO mode with selection feedback enables the selection of the BFO mode (Beat Frequency Oscillator) for the ADF system. The activation or deactivation of the BFO mode is made by using the widest knob of the dual selector knob.
This selection is memorized when another system is selected.

Q. Radio-Navigation Back-Up Mode - Frequency selection for radio communication transceivers
In radio-navigation back-up mode, the radio-communication systems can be selected as in normal mode.
Transition from a radio-navigation system to a radio-communication system does not require de-activation of the back-up mode.
When a radio navigation system is selected, the SEL indicator light continues to indicate the configurations described in paragraph 5. (3) (a) 2_ SEL indicator light.
In radio-navigation back-up mode, the radio-communication systems can be selected as in normal mode.
Transition from a radio-navigation system to a radio-communication system does not require de-activation of the back-up mode.
When a radio navigation system is selected, the SEL indicator light continues to indicate the configurations described in paragraph 5. (3) (a) 2_ SEL indicator light.

R. Radio-Navigation Back-Up Mode - GLS/MLS selection

RMP - GLS/MLS Selection ** ON A/C NOT FOR ALL

Same indications appears on the other RMP for each above selection step, as soon as NAV is selected on both RMPs.
For MLS, the same principle of selection is implemented (except that the widest knob of the rotator will be used for the 2 left digit chanel selection and the narrowest knob for the right digit).

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6. Operation
The RMPs have two modes of operation:

The normal mode
The radio-navigation back-up mode.

A. Normal Mode

Radio Communication - Normal Configuration ** ON A/C NOT FOR ALL

B. Normal Mode
In normal mode, the RMPs control the frequencies of the VHF and HF transceivers.
The operating frequencies of all the transceivers can be displayed and modified on one RMP.
The RMPs exchange the various frequencies selected for the transceivers through dialogue buses.
Any new selection made on one RMP is taken into account by the others two.
Any new selection made on one RMP is taken into account by the other.
Each RMP has two output buses connected to the radio communication equipment:

The RMP1(2) COM BUS 1 delivers the VHF1, VHF3 (if fitted) and HF1 (if fitted) frequencies.

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.

Radio Communication - Reconfiguration ** ON A/C NOT FOR ALL

In the event of failure of one RMP, the reconfiguration is possible to control the radio communication equipment.

Radio Communication - Reconfiguration ** ON A/C NOT FOR ALL

C. 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 :

On Captain side (VOR1, DME1, ILS1, ADF1(*)) for the RMP1

On First Officer side (VOR2, DME2, ILS2, ADF2(*)) for the RMP2.
(*) if installed

Radio Navigation - Normal Configuration ** ON A/C NOT FOR ALL

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.

Radio Navigation - Reconfiguration ** ON A/C NOT FOR ALL

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.
The ILS course and frequency are the only radio-navigation data exchanged through the dialogue buses.

D. HF Voice and Data Mode-Switching
The system can directly control the VHF3 switching between the voice and data modes.
The voice and data modes switching can be started from:

Air Traffic and Information Management System (ATIMS) - RMP Changes between the Data and Voice Mode

NOTE: The switching command is started when the operator pushes the transfer pushbutton switch, installed between the two displays.

ATIMS - Access to the "COMM MENU" Page

NOTE: The ATSU router monitors the value of the remote port select-discrete that the RMPs send for the switching request detection.

** ON A/C NOT FOR ALL

7. Interface

A. Connection with the Centralized Fault Display System (CFDS)
The RMP1 is linked to the CFDS by means of two buses:

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.).

The RMP1 then transmits these data to the RMP2 and the RMP3 through its output dialogue bus.

The RMP1 then transmits these data to the RMP2 through its output dialogue bus.

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 transmits the data (menu pages, data pages, etc.) to the RMP1 through its dialogue output bus.
The RMP1 then transmits these data to the CFDIU.
Each RMP receives a discrete giving the landing gear configuration.
The RMP1 receives this discrete from the LGCIU1 (Landing Gear Control and Interface Unit) and the RMP2 and 3 from the LGCIU2.
Each RMP uses this discrete for confirmation of the flight phase information coming from the CFDIU.
When the CFDIU interrogates the RMP2, this RMP transmits the data (menu pages, data pages, etc.) to the RMP1 through its dialogue output bus.
The RMP1 then transmits these data to the CFDIU.
Each RMP receives a discrete giving the landing gear configuration.
The RMP1 receives this discrete from the LGCIU1 (Landing Gear Control and Interface Unit) and the RMP2 from the LGCIU2.
Each RMP uses this discrete for confirmation of the flight phase information coming from the CFDIU.

B. Output Interface

(1) Digital Outputs
The radio-communication and radio-navigation equipment receives the frequency and course data through words. These words have a structure and a refresh rate defined in ARINC 429 Characteristics.
On the COM bus 1, each RMP transmits the labels 030, 037, 356 and 377.
On the COM bus 2, each RMP transmits the labels 030, 037 and 377.
On the NAV bus, each RMP transmits the labels 034, 035, 024, 100, 033, 017, 105, 032 and 377.

This table contains all the output parameters in the digital form.
They are sorted as per the numerical order of their output label.
The following table gives:

SYS LABEL SDI: (SDAC,FWC,DMC...) output label for which the parameter is available
PARAMETER DEFINITION: parameter name
RANGE ACCURACY: measurement range. Maximum value transmitted. When the digital value changes, the change step is equal to the accuracy
UNIT: unit in which the digital value is transmitted
SIG BIT: indicates whether a sign bit is available
DATA BITS: number of bits used by the parameter in the label
UPD/MSEC: output transmission interval. The refresh rate is given in milliseconds
CODE:
BNR: binary data word
BCD: binary coded decimal data word
ISO: data word coded in ISO5 code
DIS: discrete data word
HEX: hexadecimal coded
HYB: mixed code
ALPHA CODE: indicates the parameter mnemonic code
SOURCE ORIGIN: parameter source computer or system.

-------------------------------------------------------------------------------

| PARAMETER LIST PARAMETER CHARACTERISTICS (NUMERIC) |

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

! 030 ! VHF !118-136.975 !MHz ! ! 18 ! 180! BCD! ! !

! ! FREQ ! ! ! ! ! ! ! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

! 037 ! HF !2.8-24 !MHz ! ! 18 ! 180! BCD! ! !

! ! FREQ ! ! ! ! ! ! ! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

! 035 ! DME !108.00 ! ! ! ! ! ! ! !

! ! FREQ !135.95 !MHz ! ! 15 ! 180! BCD! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

! 032 ! ADF !190-1750 !KHz ! ! 15 ! 180! BCD! ! !

! ! FREQ ! ! ! ! ! ! ! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

! 034 ! VOR !108.00 ! ! ! ! ! ! ! !

! ! FREQ !117.95 !MHz ! ! 15 ! 180! BCD! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

! 024 ! VOR CRS !0-359 !Deg ! 3 ! 15 ! 180! BCD! ! !

! ! ! ! ! ! ! ! ! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

! 100 ! VOR CRS !0-359 !Deg ! 12 ! 11 ! 180! BNR! ! !

! ! ! ! ! ! ! ! ! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

! 033 ! ILS !108.00 ! ! ! ! ! ! ! !

! ! FREQ !111.95 !MHz ! ! 15 ! 180! BCD! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

! 017 ! ILS CRS !0-359.9 !Deg ! 4 ! 15 ! 180! BCD! ! !

! ! ! ! ! ! ! ! ! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

! 105 ! ILS CRS !0-359.9 !Deg ! 11 ! 11 ! 180! BNR! ! !

! ! ! ! ! ! ! ! ! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

! 356 !BITE ! ! ! ! ! ! ! ! !

! !STATUS ! ! ! ! ! 100! BNR! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

! 377 !EQUIP ! ! ! ! ! ! ! ! !

! !IDENT ! ! ! ! !1000! BCD! ! !

-------------------------------------------------------------------------------

(2) Digital Outputs
The radio-communication and radio-navigation equipment receives the frequency and course data through words. These words have a structure and a refresh rate defined in ARINC 429 Characteristics.
On the COM bus 1, each RMP transmits the labels 030, 037, 040, 047, 356, 377.
On the COM bus 2, each RMP transmits the labels 030, 037, 040, 047, 377.
On the NAV bus, each RMP transmits the labels 034, 035, 024, 100, 033, 017, 105, 032 and 377.
The table below contains the characteristics of all these parameters:

-------------------------------------------------------------------------------

! LABEL ! Parameter/Def. ! Word range ! Unit ! Rate ! Code ! Source Orig ! Bit!

-------------------------------------------------------------------------------

! 030 !VHF FREQ 25KHz ! 118-136.975! MHz ! 190ms! BCD ! BUS COM 1/2 ! !

! 047 !VHF FREQ 8.33KHz! 118-136.975! MHz ! 190ms! BCD ! BUS COM 1/2 ! !

! 037 ! HF FREQ ! 2.8 - 24 ! MHz ! 190ms! BCD ! BUS COM 1/2 ! !

! 035 ! DME FREQ ! 108-135.95 ! MHz ! 150ms! BCD ! BUS NAV 1/2 ! !

! 032 ! ADF FREQ ! 190 - 1750 ! KHz ! 150ms! BCD ! BUS NAV 1/2 ! !

! 040 !" 0 ADF " option! ! ! 190ms! ! BUS COM 1 ! 11 !

! 034 ! VOR FREQ ! 108-117.95 ! MHz ! 150ms! BCD ! BUS NAV 1/2 ! !

! 024 ! VOR CRS ! 0 - 359 ! deg ! 150ms! BCD ! BUS NAV 1/2 ! !

! 100 ! VOR CRS ! 0 - 359 ! deg ! 150ms! BNR ! BUS NAV 1/2 ! !

! 033 ! ILS FREQ ! 108-111.95 ! MHz ! 150ms! BCD ! BUS NAV 1/2 ! !

! 017 ! ILS FREQ ! 0 - 359.9 ! deg ! 150ms! BCD ! BUS NAV 1/2 ! !

! 105 ! ILS CRS ! 0 - 359.9 ! deg ! 150ms! BNR ! BUS NAV 1/2 ! !

! 356 ! BITE STATUS ! ! ! 190ms! ISO ! BUS COM 1 ! !

! 377 ! EQUIP IDENT ! ! ! 190ms! BCD ! BUS COM 1/2 ! !

-------------------------------------------------------------------------------

(3) Digital Outputs
The radio-communication and radio-navigation equipment receives the frequency and course data through words. These words have a structure and a refresh rate defined in ARINC 429 Characteristics.
On the COM bus 1, each RMP transmits the labels 030, 037, 040, 047, 356, 377.
On the COM bus 2, each RMP transmits the labels 030, 037, 040, 047, 377.
On the NAV bus, each RMP transmits the labels 034, 035, 024, 100, 033, 017, 105, 032 and 377.
The table below contains the characteristics of all these parameters:

-------------------------------------------------------------------------------

! LABEL ! Parameter/Def. ! Word range ! Unit ! Rate ! Code ! Source Orig ! Bit!

-------------------------------------------------------------------------------

! 030 !VHF FREQ 25KHz ! 118-136.975! MHz ! 190ms! BCD ! BUS COM 1/2 ! !

! 047 !VHF FREQ 8.33KHz! 118-136.975! MHz ! 190ms! BCD ! BUS COM 1/2 ! !

! 037 ! HF FREQ ! 2.8 - 24 ! MHz ! 190ms! BCD ! BUS COM 1/2 ! !

! 035 ! DME FREQ ! 108-135.95 ! MHz ! 150ms! BCD ! BUS NAV 1/2 ! !

! 035 ! GLS ! 20001-39999!chanel! 190ms! BCD ! BUS COM 1/2 ! !

! 035 ! MLS ! 500-699 !chanel! 190ms! BCD ! BUS COM 1/2 ! !

! 032 ! ADF FREQ ! 190 - 1750 ! KHz ! 150ms! BCD ! BUS NAV 1/2 ! !

! 040 !" 0 ADF " option! ! ! 190ms! ! BUS COM 1 ! 11 !

! 034 ! VOR FREQ ! 108-117.95 ! MHz ! 150ms! BCD ! BUS NAV 1/2 ! !

! 024 ! VOR CRS ! 0 - 359 ! deg ! 150ms! BCD ! BUS NAV 1/2 ! !

! 100 ! VOR CRS ! 0 - 359 ! deg ! 150ms! BNR ! BUS NAV 1/2 ! !

! 033 ! ILS FREQ ! 108-111.95 ! MHz ! 150ms! BCD ! BUS NAV 1/2 ! !

! 017 ! ILS FREQ ! 0 - 359 ! deg ! 150ms! BCD ! BUS NAV 1/2 ! !

! 105 ! ILS CRS ! 0 - 359 ! deg ! 150ms! BNR ! BUS NAV 1/2 ! !

! 356 ! BITE STATUS ! ! ! 190ms! ISO ! BUS COM 1 ! !

! 377 ! EQUIP IDENT ! ! ! 190ms! BCD ! BUS COM 1/2 ! !

-------------------------------------------------------------------------------

(4) Output Discretes

-------------------------------------------------------------------------------

NAME ELECTRICAL LEVEL TO SIGNAL STATUS

-------------------------------------------------------------------------------

COM PORT SELECT GND/O.C. RADIO COM GND = PORT B

EQUIPMENT SELECT

NAV PORT SELECT GND/O.C. RADIO NAV GND = PORT B

EQUIPMENT SELECT

NAV CONTROL GND/O.C. FMGC GND = RMP FAIL

(5) Output Discretes

(a) From RMP1 & RMP2:

-------------------------------------------------------------------------------

NAME ELECTRICAL LEVEL TO SIGNAL STATUS

-------------------------------------------------------------------------------

COM PORT SELECT GND/O.C. RADIO COM GND = PORT B

EQUIPMENT SELECT

NAV PORT SELECT GND/O.C. RADIO NAV GND = PORT B

EQUIPMENT SELECT

NAV CONTROL GND/O.C. FMGC GND = RMP FAIL

-------------------------------------------------------------------------------

(b) From RMP3:

-------------------------------------------------------------------------------

NAME ELECTRICAL LEVEL TO SIGNAL STATUS

-------------------------------------------------------------------------------

COM PORT SELECT GND/O.C. RMP1 & RMP2 GND = PORT B

SELECT

-------------------------------------------------------------------------------

** ON A/C NOT FOR ALL

8. Test

A. Built-In Test Equipment (BITE)
The BITE facilitates maintenance on in-service aircraft. It detects and identifies a failure related to the RMP.
The BITE of the RMP is connected to the Centralized Fault Display Interface Unit (CFDIU) (Ref. 31-32).
The BITE:

Transmits permanently RMP status and its identification message to the CFDIU.
Memorizes the failures which occurred during the last 63 flight segments.
Monitors data inputs from the various peripherals (VHF, HF and CFDIU).
Transmits to the CFDIU the result of the tests performed and self-tests.
Can communicate with the CFDIU through the menus.

B. General Operation
The BITE can operate in two modes:

The normal mode
The menu mode.

(1) Normal mode
In normal mode the BITE monitors cyclically the momentaneous status of the RMP. It transmits these information signals to the CFDIU during the concerned flight.
In case of fault detection, the BITE stores the information signals in the fault memories.
These information signals are transmitted to the CFDIU every 100 ms by an ARINC 429 message with label 356, and label 377 with equipment id:36.

(2) Menu mode
The menu mode can only be activated on the ground.
This mode enables communication between the CFDIU and the RMP BITE by means of the Multipurpose Control and Display Unit (MCDU).
The RMP menu mode is composed of:

LAST LEG REPORT
PREVIOUS LEGS REPORT
LRU IDENTIFICATION
GROUND SCANNING
TROUBLE SHOOT DATA
CLASS 3 FAULT
GROUND REPORT
TEST.

C. Functional Description

BITE - LAST LEG REPORT

BITE - PREVIOUS LEGS REPORT

BITE - LRU IDENTIFICATION

BITE - TEST ** ON A/C NOT FOR ALL

BITE - GROUND SCANNING

BITE - TROUBLE SHOOTING DATA

BITE - CLASS 3 FAULTS

BITE - GROUND REPORT

To gain access to the BITE, it is necessary to use one MCDU (Ref. 31-32).
The MCDUs 3CA1 and 3CA2 are installed in the cockpit, on the center pedestal.

[Rev.10 from 2021] 2026.04.02 06:12:01 UTC