DOC AIRBUS | AMM A320FHF SYSTEM - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The High Frequency (HF) system is used for all long-distance voice communications between:
The aircraft is provided with a single HF system (HF1).
The aircraft is provided with a double HF system (HF1 and HF2).
** ON A/C NOT FOR ALL The High Frequency (HF) system is used for all long-distance voice communications between:
- Different aircraft (in flight or on the ground)
- The aircraft and one or several ground stations.
- Different aircraft (in flight or on the ground)
- The aircraft and one or several ground stations.
The aircraft is provided with a single HF system (HF1).
The aircraft is provided with a double HF system (HF1 and HF2).
2. Component Location
HF System - Component Location ** ON A/C NOT FOR ALL
HF System - Component Location ** ON A/C NOT FOR ALL
HF System - Component Location ** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL HF System - Component Location ** ON A/C NOT FOR ALL HF System - Component Location ** ON A/C NOT FOR ALL HF System - Component Location ** ON A/C NOT FOR ALL | FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C ALL | |||||
| 3RE1 | XCVR-HF, 1 | 81VU | 127 | 23-11-33 | |
| 4RE1 | COUPLER-HF, 1 | 261 | 23-11-36 | ||
| 5RE | ANTENNA | 322 | 23-11-11 | ||
| ** ON A/C NOT FOR ALL | |||||
| 3RE2 | XCVR-HF, 2 | 82VU | 128 | 23-11-33 | |
| 4RE2 | COUPLER-HF, 2 | 262 | 23-11-36 | ||
3. System Description
HF System - Block Diagram ** ON A/C NOT FOR ALL
HF System - Block Diagram ** ON A/C NOT FOR ALL
HF System - Block Diagram ** ON A/C NOT FOR ALL
HF System - Block Diagram ** ON A/C NOT FOR ALL HF System - Block Diagram ** ON A/C NOT FOR ALL HF System - Block Diagram ** ON A/C NOT FOR ALL A. General
The HF system has:
The HF system has:
- An HF transceiver
- An HF coupler
- An HF antenna.
- Two HF transceivers
- Two HF couplers
- An HF antenna.
B. Interface
Each HF system has an interface with the following systems and components:
Each HF system has an interface with the following systems and components:
- Radio Management Panels (RMP)
- Audio Management Unit (AMU)
- Centralized Fault Display Interface Unit (CFDIU)
- Landing Gear Control Interface Unit (LGCIU)
- System Data Acquisition Concentrator (SDAC)
- Radio Management Panels (RMP)
- Audio Management Unit (AMU)
- Centralized Fault Display Interface Unit (CFDIU)
- Landing Gear Control Interface Unit (LGCIU)
- System Data Acquisition Concentrator (SDAC)
- Air Data/Inertial Reference Units (ADIRU)
- Air Traffic Service Unit (ATSU)
- Ground HF DATA LINK (GND HF DATA LINK)
- International Civil Aircraft Organization (ICAO) address
- Multipurpose Disk Drive Unit (MDDU) or Portable Data Loader (PDL)
- Radio Management Panels (RMP)
- Audio Management Unit (AMU)
- Centralized Fault Display Interface Unit (CFDIU)
- Landing Gear Control Interface Unit (LGCIU)
- System Data Acquisition Concentrator (SDAC)
- Air Data/Inertial Reference Units (ADIRU)
- Air Traffic Service Unit (ATSU)
- Ground HF DATA LINK (GND HF DATA LINK)
- International Civil Aircraft Organization (ICAO) address
- Radio Management Panels (RMP)
- Audio Management Unit (AMU)
- Centralized Fault Display Interface Unit (CFDIU)
- Landing Gear Control Interface Unit (LGCIU)
- System Data Acquisition Concentrator (SDAC)
- Air Data/Inertial Reference Units (ADIRU)
- Air Traffic Service Unit (ATSU)
- Ground HF DATA LINK (GND HF DATA LINK)
- International Civil Aircraft Organization (ICAO) address
- Multipurpose Disk Drive Unit (MDDU) or Portable Data Loader (PDL)
- Air Traffic and Information Management System (ATIMS)
- Radio Management Panels (RMP)
- Audio Management Unit (AMU)
- Centralized Fault Display Interface Unit (CFDIU)
- Landing Gear Control Interface Unit (LGCIU)
- System Data Acquisition Concentrator (SDAC)
- Air Data/Inertial Reference Units (ADIRU)
- Air Traffic Service Unit (ATSU)
- Ground HF DATA LINK (GND HF DATA LINK)
- International Civil Aircraft Organization (ICAO) address
- Air Traffic and Information Management System (ATIMS)
- Radio Management Panels (RMP)
- Audio Management Unit (AMU)
- Centralized Fault Display Interface Unit (CFDIU)
- Landing Gear Control and Interface Unit (LGCIU)
- System Data Acquisition Concentrator (SDAC)
- Air Data/Inertial Reference Units (ADIRU)
- Air Traffic Service Unit (ATSU)
- Ground HF DATA LINK (GND HF DATA LINK)
- International Civil Aviation Organization (ICAO) address
- Data Loading Routing Box (DLRB).
(1) Interface with the RMPs
The RMPs are centralized systems used for selection of the frequency/channel and display of the HF system. They are also used to switch between the voice/data modes (Ref. 23-13).
The RMPs are centralized systems used for selection of the frequency/channel and display of the HF system. They are also used to switch between the voice/data modes (Ref. 23-13).
(2) Interface with the AMU
The AMU is used for the connection to the audio integrating and SELective CALLing (SELCAL) systems by means of the Audio Control Panels (ACP) (Ref. 23-51).
The AMU is used for the connection to the audio integrating and SELective CALLing (SELCAL) systems by means of the Audio Control Panels (ACP) (Ref. 23-51).
(4) Interface with the LGCIU
In case of CFDIU failure, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. 32-31)
In case of CFDIU failure, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. 32-31)
(5) Interface with the SDACs
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver and record the transmit mode.
When the SDACs detect that the HF system has been transmitting (Push-To-Talk (PTT) switch on) for more than 1 minute, the HF-X EMITTING indication is displayed on the ECAM display (EWD) (Ref. ATA 31-54).
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver and record the transmit mode.
When the SDACs detect that the HF system has been transmitting (Push-To-Talk (PTT) switch on) for more than 1 minute, the HF-X EMITTING indication is displayed on the ECAM display (EWD) (Ref. ATA 31-54).
(6) Interface with the RMPs
The RMPs are centralized systems used for selection of the frequency/channel and display of the HF system. They are also used to switch between the voice/data modes (Ref. 23-13).
The RMPs are centralized systems used for selection of the frequency/channel and display of the HF system. They are also used to switch between the voice/data modes (Ref. 23-13).
(7) Interface with the AMU
The AMU is used for the connection to the audio integrating and SELective CALLing (SELCAL) systems by means of the Audio Control Panels (ACP) (Ref. 23-51).
The AMU is used for the connection to the audio integrating and SELective CALLing (SELCAL) systems by means of the Audio Control Panels (ACP) (Ref. 23-51).
(9) Interface with the LGCIU
In case of CFDIU failure, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. 32-31). When the LGCIU informs the HFDR of the ground aircraft status, the HF data link emission is inhibited.
In case of CFDIU failure, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. 32-31). When the LGCIU informs the HFDR of the ground aircraft status, the HF data link emission is inhibited.
(10) Interface with the SDACs
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver and record the transmit mode.
When the SDACs detect that the HF system has been transmitting (Push-To-Talk (PTT) switch on) for more than 1 minute, the HF-X EMITTING indication is displayed on the ECAM display (EWD) (Ref. ATA 31-54).
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver and record the transmit mode.
When the SDACs detect that the HF system has been transmitting (Push-To-Talk (PTT) switch on) for more than 1 minute, the HF-X EMITTING indication is displayed on the ECAM display (EWD) (Ref. ATA 31-54).
(11) Interface with the ADIRU
The ADIRU which provides the HFDR with the following information:
- time
- latitude
- longitude.
The ADIRU which provides the HFDR with the following information:
- time
- latitude
- longitude.
(12) Interface with the ATSU
The ATSU which is in charge of routing data towards the HF system for Data communications.
The ATSU which is in charge of routing data towards the HF system for Data communications.
(13) Interface with the GND HF DATA Link
- The GND HF DATA LINK pushbutton switch which is used to override the data transmission inhibition of the HF1 transceiver on the ground.
(14) Interface with the ICAO address
The ICAO address which is used to uniquely identify the aircraft by the ground station during data link message exchanges.
The ICAO address which is used to uniquely identify the aircraft by the ground station during data link message exchanges.
(15) Interface with the MDDU or PDL
The MDDU or PDL is used to load the HFDR software.
The MDDU or PDL is used to load the HFDR software.
(16) Interface with the RMPs
The RMPs are centralized systems used for selection of the frequency/channel and display of the HF system. They are also used to switch between the voice/data modes (Ref. 23-13).
The RMPs are centralized systems used for selection of the frequency/channel and display of the HF system. They are also used to switch between the voice/data modes (Ref. 23-13).
(17) Interface with the AMU
The AMU is used for the connection to the audio integrating and SELective CALLing (SELCAL) systems by means of the Audio Control Panels (ACP) (Ref. 23-51).
The AMU is used for the connection to the audio integrating and SELective CALLing (SELCAL) systems by means of the Audio Control Panels (ACP) (Ref. 23-51).
(19) Interface with the LGCIU
In case of CFDIU failure, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. 32-31). When the LGCIU informs the HFDR of the ground aircraft status, the HF data link emission is inhibited.
In case of CFDIU failure, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. 32-31). When the LGCIU informs the HFDR of the ground aircraft status, the HF data link emission is inhibited.
(20) Interface with the SDACs
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver and record the transmit mode.
When the SDACs detect that the HF system has been transmitting (Push-To-Talk (PTT) switch on) for more than 1 minute, the HF-X EMITTING indication is displayed on the ECAM display (EWD) (Ref. ATA 31-54).
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver and record the transmit mode.
When the SDACs detect that the HF system has been transmitting (Push-To-Talk (PTT) switch on) for more than 1 minute, the HF-X EMITTING indication is displayed on the ECAM display (EWD) (Ref. ATA 31-54).
(21) Interface with the ADIRU
The ADIRU which provides the HFDR with the following information:
- time
- latitude
- longitude.
The ADIRU which provides the HFDR with the following information:
- time
- latitude
- longitude.
(22) Interface with the ATSU
The ATSU which is in charge of routing data towards the HF system for Data communications.
The ATSU which is in charge of routing data towards the HF system for Data communications.
(23) Interface with the GND HF DATA Link
- The GND HF DATA LINK pushbutton switch which is used to override the data transmission inhibition of the HF1 transceiver on the ground.
(24) Interface with the ICAO address
The ICAO address which is used to uniquely identify the aircraft by the ground station during data link message exchanges.
The ICAO address which is used to uniquely identify the aircraft by the ground station during data link message exchanges.
(25) Interface with the RMPs
The RMPs are centralized systems used for selection of the frequency/channel and display of the HF system. They are also used to switch between the voice/data modes (Ref. 23-13).
The RMPs are centralized systems used for selection of the frequency/channel and display of the HF system. They are also used to switch between the voice/data modes (Ref. 23-13).
(26) Interface with the AMU
The AMU is used for the connection to the audio integrating and SELective CALLing (SELCAL) systems by means of the Audio Control Panels (ACP) (Ref. 23-51).
The AMU is used for the connection to the audio integrating and SELective CALLing (SELCAL) systems by means of the Audio Control Panels (ACP) (Ref. 23-51).
(28) Interface with the LGCIU
In case of CFDIU failure, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. 32-31). When the LGCIU informs the HFDR of the ground aircraft status, HF data link emission is inhibited.
In case of CFDIU failure, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. 32-31). When the LGCIU informs the HFDR of the ground aircraft status, HF data link emission is inhibited.
(29) Interface with the SDACs
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver and record the transmit mode.
When the SDACs detect that the HF system has been transmitting (Push-To-Talk (PTT) switch on) for more than 1 minute, the HF-X EMITTING indication is displayed on the ECAM display (EWD) (Ref. ATA 31-54).
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver and record the transmit mode.
When the SDACs detect that the HF system has been transmitting (Push-To-Talk (PTT) switch on) for more than 1 minute, the HF-X EMITTING indication is displayed on the ECAM display (EWD) (Ref. ATA 31-54).
(30) Interface with the ADIRU
The ADIRU which provide the HFDR with the following informations:
- time
- latitude
- longitude.
The ADIRU which provide the HFDR with the following informations:
- time
- latitude
- longitude.
(31) Interface with the ATSU
The ATSU which is in charge of routing data towards the HF system for Data communications.
The ATSU which is in charge of routing data towards the HF system for Data communications.
(32) Interface with the GND HF DATA Link
- The GND HF DATA LINK pushbutton switch which is used to override the data transmission inhibition of the HF1 transceiver on ground.
(33) Interface with the ICAO address
The ICAO address which is used to uniquely identify the aircraft by the ground station during data link message exchanges.
The ICAO address which is used to uniquely identify the aircraft by the ground station during data link message exchanges.
(34) Interface with the MDDU or PDL
The MDDU or PDL is used to load the HFDR software.
The MDDU or PDL is used to load the HFDR software.
(35) Interface with the ATIMS
- The HFDR system is one subnetwork used by the ATIMS for datalink communications (Ref. ATA 46-21).
(36) Interface with the RMPs
The RMPs are centralized systems used for selection of the frequency/channel and display of the HF system. They are also used to switch between the voice/data modes (Ref. 23-13).
The RMPs are centralized systems used for selection of the frequency/channel and display of the HF system. They are also used to switch between the voice/data modes (Ref. 23-13).
(37) Interface with the AMU
The AMU is used for the connection to the audio integrating and SELective CALLing (SELCAL) systems by means of the Audio Control Panels (ACP) (Ref. 23-51).
The AMU is used for the connection to the audio integrating and SELective CALLing (SELCAL) systems by means of the Audio Control Panels (ACP) (Ref. 23-51).
(39) Interface with the LGCIU
In case of CFDIU failure, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. 32-31). When the LGCIU informs the HFDR of the ground aircraft status, HF data link emission is inhibited.
In case of CFDIU failure, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. 32-31). When the LGCIU informs the HFDR of the ground aircraft status, HF data link emission is inhibited.
(40) Interface with the SDACs
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver and record the transmit mode.
When the SDACs detect that the HF system has been transmitting (Push-To-Talk (PTT) switch on) for more than 1 minute, the HF-X EMITTING indication is displayed on the ECAM display (EWD) (Ref. ATA 31-54).
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver and record the transmit mode.
When the SDACs detect that the HF system has been transmitting (Push-To-Talk (PTT) switch on) for more than 1 minute, the HF-X EMITTING indication is displayed on the ECAM display (EWD) (Ref. ATA 31-54).
(41) Interface with the ADIRU
The ADIRU which provide the HFDR with the following informations:
- time
- latitude
- longitude.
The ADIRU which provide the HFDR with the following informations:
- time
- latitude
- longitude.
(42) Interface with the ATSU
The ATSU which is in charge of routing data towards the HF system for Data communications.
The ATSU which is in charge of routing data towards the HF system for Data communications.
(43) Interface with the GND HF DATA Link
- The GND HF DATA LINK pushbutton switch which is used to override the data transmission inhibition of the HF1 transceiver on ground.
(44) Interface with the ICAO address
The ICAO address which is used to uniquely identify the aircraft by the ground station during data link message exchanges.
The ICAO address which is used to uniquely identify the aircraft by the ground station during data link message exchanges.
(45) Interface with the ATIMS
- The HFDR system is one subnetwork used by the ATIMS for datalink communications (Ref. ATA 46-21).
(46) Interface with the Radio and Audio Management Panels (RMP)
The RMPs are centralized systems used for the selection of the frequency/channel and for the display of the HF system. They are also used to switch between the voice and the data modes (Ref. AMM D/O 23-13-00-00).
(2) Interface with the Audio Management Unit (AMU)
The AMU is used for the connection to the audio integrating and SELective CALling (SELCAL) systems through the Audio Control Panels (ACP) (Ref. AMM D/O 23-51-00-00).
(3) Interface with the Centralized Fault Display Interface Unit (CFDIU)
The CFDIU is the centralized maintenance system (Ref. AMM D/O 31-32-00-00).
(4) Interface with the Landing Gear Control and Interface Unit (LGCIU)
If a failure of the CFDIU occurs, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. AMM D/O 32-31-00-00). When the LGCIU gives the ground aircraft status to the High Frequency Data Radio (HFDR), it prevents HF data link emission.
(5) Interface with the System Data Acquisition Concentrators (SDAC)
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver, and record the transmit mode.
When the SDACs detect that the HF system transmits (Push-To-Talk (PTT) switch on) for more than one minute, the HF-X EMITTING indication is shown on the ECAM display (EWD) (Ref. AMM D/O 31-54-00-00).
(6) Interface with the Air Data/Inertial Reference Unit (ADIRU)
The ADIRU gives the HFDR the information that follows:
- Time
- Latitude
- Longitude.
(7) Interface with the Air Traffic Service Unit (ATSU)
The ATSU sends data to the HF system for data communications.
(8) Interface with the GND HF DATA Link
The GND HF DATA LINK pushbutton switch overrides the data transmission inhibition of the HF1 transceiver on the ground.
(9) Interface with the International Civil Aviation Organization (ICAO) address
The ICAO address let the ground station fully identify the aircraft during data-link message exchanges.
(10) Interface with the Data Loading Routing Box (DLRB)
The DLRB is used to upload the HFDR software into HFDR 1 and HFDR 2.
The RMPs are centralized systems used for the selection of the frequency/channel and for the display of the HF system. They are also used to switch between the voice and the data modes (Ref. AMM D/O 23-13-00-00).
(2) Interface with the Audio Management Unit (AMU)
The AMU is used for the connection to the audio integrating and SELective CALling (SELCAL) systems through the Audio Control Panels (ACP) (Ref. AMM D/O 23-51-00-00).
(3) Interface with the Centralized Fault Display Interface Unit (CFDIU)
The CFDIU is the centralized maintenance system (Ref. AMM D/O 31-32-00-00).
(4) Interface with the Landing Gear Control and Interface Unit (LGCIU)
If a failure of the CFDIU occurs, the LGCIU gives the aircraft status (in flight or on the ground) to the HF BITE (Ref. AMM D/O 32-31-00-00). When the LGCIU gives the ground aircraft status to the High Frequency Data Radio (HFDR), it prevents HF data link emission.
(5) Interface with the System Data Acquisition Concentrators (SDAC)
The SDACs receive the transmission information from the HF system through the KEY EVENT output of the HF transceiver, and record the transmit mode.
When the SDACs detect that the HF system transmits (Push-To-Talk (PTT) switch on) for more than one minute, the HF-X EMITTING indication is shown on the ECAM display (EWD) (Ref. AMM D/O 31-54-00-00).
(6) Interface with the Air Data/Inertial Reference Unit (ADIRU)
The ADIRU gives the HFDR the information that follows:
- Time
- Latitude
- Longitude.
(7) Interface with the Air Traffic Service Unit (ATSU)
The ATSU sends data to the HF system for data communications.
(8) Interface with the GND HF DATA Link
The GND HF DATA LINK pushbutton switch overrides the data transmission inhibition of the HF1 transceiver on the ground.
(9) Interface with the International Civil Aviation Organization (ICAO) address
The ICAO address let the ground station fully identify the aircraft during data-link message exchanges.
(10) Interface with the Data Loading Routing Box (DLRB)
The DLRB is used to upload the HFDR software into HFDR 1 and HFDR 2.
4. Power Supply
HF System - Power Supply ** ON A/C NOT FOR ALL
HF System - Power Supply ** ON A/C NOT FOR ALL
HF System - Power Supply ** ON A/C NOT FOR ALL
The HF1 system is supplied with three-phase 115VAC:
The HF1 system is supplied with three-phase 115VAC:
The HF2 transceiver (3RE2) supplies to the HF2 antenna coupler (4RE2) with 28VDC and monophase 115VAC.
** ON A/C NOT FOR ALL HF System - Power Supply ** ON A/C NOT FOR ALL HF System - Power Supply ** ON A/C NOT FOR ALL HF System - Power Supply ** ON A/C NOT FOR ALL - From the 115VAC BUS 1 (sub-busbar 101XP)
- Through circuit breaker 1RE1 located on the overhead panel 121VU, in the cockpit.
The HF1 transceiver (3RE1) provides the supplied to the HF1 antenna coupler (4RE1) with 28VDC and monophase 115VAC.
- From the 115VAC ESS BUS/SHEDDABLE (sub-busbar 801XP)
- Through circuit breaker 1RE1 located on the overhead panel 49VU.
The HF1 system is supplied with three-phase 115VAC:
- From the 115VAC ESS BUS/SHEDDABLE (sub-busbar 801XP)
- Through circuit breaker 1RE1 located on the overhead panel 49VU.
- From the 115VAC BUS 2 (sub-busbar 202XP)
- Through circuit breaker 1RE2 located on the overhead panel 121VU.
The HF2 transceiver (3RE2) supplies to the HF2 antenna coupler (4RE2) with 28VDC and monophase 115VAC.
5. Interface
A. Output Interface
(1) Digital Outputs
The connections with the CFDIU is a type 1 system. This type of system has an ARINC 429 input from the CFDIU and an ARINC 429 output. This system is thus capable of a two-way communication with the CFDIU (Ref.31-32).
The radio-communication equipment receives the frequency data through words from RMPs. These words have a structure and a refresh rate defined in ARINC 429 characteristics specification.
On the output bus, each HF transceiver transmits the labels 356, 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:
The equipment code of the HF transceiver is 019.
The connections with the CFDIU is a type 1 system. This type of system has an ARINC 429 input from the CFDIU and an ARINC 429 output. This system is thus capable of a two-way communication with the CFDIU (Ref.31-32).
The radio-communication equipment receives the frequency data through words from RMPs. These words have a structure and a refresh rate defined in ARINC 429 characteristics specification.
On the output bus, each HF transceiver transmits the labels 356, 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:
- EQ.SYS.LAB.SDI: (SDAC,FWC,DMC...) output label for which the parameter is available
- PARAMETER DEFINITION: parameter name
- WORD RANGE/OPER RANGE/RESOLUTION 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
- BITS: number of bits used by the parameter in the label
- XMSN/INTV: 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) | |
| ------------------------------------------------------------------------------- |
| |EQ.SYS.LAB.SDI|PARAMETER | WORD RANGE |UNIT|SIG |BITS|XMSN|CODE|ALPHA|SOURCE | |
| | |DEFINITION| OPER RANGE | |BIT | |INTV| |CODE |ORIGIN | |
| | |(*=REMARK)| RESOLUTION | | | | | | |BUS No.| |
| | |(X=NOTE) | ACCURACY | | | | | | |ATA REF| |
| | | | | | | | | | |CONV | |
| ------------------------------------------------------------------------------- |
| ! 356 !BITE ! ! ! ! ! ! ! ! ! |
| ! !STATUS ! ! ! ! ! 100! BNR! ! ! |
| ! ! ! ! ! ! ! ! ! ! ! |
| ! 377 !EQUIP ! ! ! ! ! ! ! ! ! |
| ! !IDENT ! ! ! ! !1000! BCD! ! ! |
| ------------------------------------------------------------------------------- |
The equipment code of the HF transceiver is 019.
(2) Output Discretes
These Output discretes are the same for each HF circuit.
These Output discretes are the same for each HF circuit.
| ------------------------------------------------------------------------------- |
| NAME ELECTRICAL LEVEL TO SIGNAL STATUS |
| ------------------------------------------------------------------------------- |
| KEY EVENT GND/O.C. SDAC GND=EMISSION |
| PTT GND/O.C. HF COUPLER |
| & AMU GND=EMISSION |
| RECHANNEL PULSE 5V/O.C. HF COUPLER |
| TUNE POWER 28V/O.C. HF COUPLER |
| RELAY INTERLOCK 28V/O.C. HF COUPLER |
| INTERLOCK EXITATION 28V/O.C. HF COUPLER |
(3) Output Analog Signals
These Output Analog Signals are the same for each HF circuit.
These Output Analog Signals are the same for each HF circuit.
| ------------------------------------------------------------------------------- |
| NAME ELECTRICAL LEVEL TO SIGNAL STATUS |
| ------------------------------------------------------------------------------- |
| AUDIO SIDETONE OUTPUT MODULATION AMU |
| SELCAL OUTPUT MODULATION AMU |
(4) Digital Outputs
The HF transceivers transmit labels 354, 356 and 357 to the CFDIU through a type-1 ARINC 429 bus. This connection is capable of two-way communication with the CFDIU (Ref. 31-32).
The equipment code of the HF transceiver is 019.
An ARINC 429 High-Speed (HS) output bus between the HF1 transceiver (HFDR1) and the ATSU is used to transmit user data and control data.
Only the HF1 transceiver transmits the label 270.
Another output bus between the HF1 transceiver (HFDR1) and the MDDU is used to load data. The table below contains the characteristics of all these parameters:
The HF transceivers transmit labels 354, 356 and 357 to the CFDIU through a type-1 ARINC 429 bus. This connection is capable of two-way communication with the CFDIU (Ref. 31-32).
The equipment code of the HF transceiver is 019.
An ARINC 429 High-Speed (HS) output bus between the HF1 transceiver (HFDR1) and the ATSU is used to transmit user data and control data.
Only the HF1 transceiver transmits the label 270.
Another output bus between the HF1 transceiver (HFDR1) and the MDDU is used to load data. The table below contains the characteristics of all these parameters:
| ------------------------------------------------------------------------------- |
| | PARAMETER LIST PARAMETER CHARACTERISTICS (NUMERIC) | |
| ------------------------------------------------------------------------------- |
| |EQ.SYS.LAB.SDI|PARAMETER | WORD RANGE |UNIT|SIG |BITS|XMSN|CODE|ALPHA|SOURCE | |
| | |DEFINITION| OPER RANGE | |BIT | |INTV| |CODE |ORIGIN | |
| | |(*=REMARK)| RESOLUTION | | | | | | |BUS No.| |
| | |(X=NOTE) | ACCURACY | | | | | | |ATA REF| |
| | | | | | | | | | |CONV | |
| ------------------------------------------------------------------------------- |
| ! ! ! ! ! ! ! ! ! ! |
| ! 172 !SAL MODE ! ! ! ! !1000! BCD! ! |
| ! ! ! ! ! ! ! ! ! ! |
| ! 270 !STATUS ! ! ! ! !1000!BOOL! ! |
| ! !MODE ! ! ! ! ! !WORD! ! |
| ! ! ! ! ! ! ! ! ! ! |
| ! 354 !LRU IDENT ! ! ! ! !250 !ISO5! ! |
| ! ! ! ! ! ! ! ! ! ! |
| ! 356 !BITE ! ! ! ! ! ! ! ! |
| ! !STATUS ! ! ! ! !250 !ISO5! ! |
| ! ! ! ! ! ! ! ! ! ! |
| ! 377 !EQUIP ! ! ! ! ! ! ! ! |
| ! !IDENT ! ! ! ! !1000! BCD! ! |
| ------------------------------------------------------------------------------- |
(5) Digital Outputs
The connections with the CFDIU is a type 1 system. This type of system has an ARINC 429 input from the CFDIU and an ARINC 429 output. This system is thus capable of a two-way communication with the CFDIU (Ref.31-32).
The radio-communication equipment receives the frequency data through words from RMPs. These words have a structure and a refresh rate defined in ARINC 429 characteristics specification.
On the output bus, each HF transceiver transmits the labels 354, 356 and 377.
A further output bus between the HF1 transceiver (HFDR1) and the data loader connector, through the DLRB, is used in the data loading operation.
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:
The equipment code of the HF transceiver is 019.
The connections with the CFDIU is a type 1 system. This type of system has an ARINC 429 input from the CFDIU and an ARINC 429 output. This system is thus capable of a two-way communication with the CFDIU (Ref.31-32).
The radio-communication equipment receives the frequency data through words from RMPs. These words have a structure and a refresh rate defined in ARINC 429 characteristics specification.
On the output bus, each HF transceiver transmits the labels 354, 356 and 377.
A further output bus between the HF1 transceiver (HFDR1) and the data loader connector, through the DLRB, is used in the data loading operation.
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:
- EQ.SYS.LAB.SDI: (SDAC,FWC,DMC...) output label for which the parameter is available
- PARAMETER DEFINITION: parameter name
- WORD RANGE/OPER RANGE/RESOLUTION 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
- BITS: number of bits used by the parameter in the label
- XMSN/INTV: 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) | |
| ------------------------------------------------------------------------------- |
| |EQ.SYS.LAB.SDI|PARAMETER | WORD RANGE |UNIT|SIG |BITS|XMSN|CODE|ALPHA|SOURCE | |
| | |DEFINITION| OPER RANGE | |BIT | |INTV| |CODE |ORIGIN | |
| | |(*=REMARK)| RESOLUTION | | | | | | |BUS No.| |
| | |(X=NOTE) | ACCURACY | | | | | | |ATA REF| |
| | | | | | | | | | |CONV | |
| ------------------------------------------------------------------------------- |
| ! 354 !LRU IDENT ! ! ! ! ! 50 ! ISO! ! ! |
| ! ! ! ! ! ! ! ! ! ! ! |
| ! 356 !BITE ! ! ! ! ! ! ! ! ! |
| ! !STATUS ! ! ! ! ! 50 ! ISO! ! ! |
| ! ! ! ! ! ! ! ! ! ! ! |
| ! 377 !EQUIP ! ! ! ! ! ! ! ! ! |
| ! !IDENT ! ! ! ! !1000! BCD! ! ! |
| ------------------------------------------------------------------------------- |
The equipment code of the HF transceiver is 019.
(6) Output Discretes
These Output discretes are the same for each HF circuit.
These Output discretes are the same for each HF circuit.
| ------------------------------------------------------------------------------- |
| NAME ELECTRICAL LEVEL TO SIGNAL STATUS |
| ------------------------------------------------------------------------------- |
| KEY EVENT GND/O.C. SDAC GND=EMISSION |
| PTT GND/O.C. HF COUPLER |
| & AMU GND=EMISSION |
| RECHANNEL PULSE 5V/O.C. HF COUPLER GND=RECHANNEL |
| TUNE POWER 28V/O.C. HF GND=COUPLER |
| TRANSCEIVER TUNING |
| RELAY INTERLOCK 28V/O.C. HF 28V=KEY |
| TRANSCEIVER ENABLED |
(7) Output Analog Signals
These Output Analog Signals are the same for each HF circuit.
These Output Analog Signals are the same for each HF circuit.
| ------------------------------------------------------------------------------- |
| NAME ELECTRICAL LEVEL TO SIGNAL STATUS |
| ------------------------------------------------------------------------------- |
| AUDIO SIDETONE OUTPUT MODULATION AMU |
| SELCAL OUTPUT MODULATION AMU |
(8) Digital Outputs
The connections with the CFDIU is a type 1 system. This type of system has an ARINC 429 input from the CFDIU and an ARINC 429 output. This system is thus capable of a two-way communication with the CFDIU (Ref.31-32).
The radio-communication equipment receives the frequency data through words from RMPs. These words have a structure and a refresh rate defined in ARINC 429 characteristics specification. connector, through the DLRB, is used in the data loading operation.
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:
The equipment code of the HF transceiver is 019.
The connections with the CFDIU is a type 1 system. This type of system has an ARINC 429 input from the CFDIU and an ARINC 429 output. This system is thus capable of a two-way communication with the CFDIU (Ref.31-32).
The radio-communication equipment receives the frequency data through words from RMPs. These words have a structure and a refresh rate defined in ARINC 429 characteristics specification. connector, through the DLRB, is used in the data loading operation.
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:
- EQ.SYS.LAB.SDI: (SDAC,FWC,DMC...) output label for which the parameter is available
- PARAMETER DEFINITION: parameter name
- WORD RANGE/OPER RANGE/RESOLUTION 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
- BITS: number of bits used by the parameter in the label
- XMSN/INTV: 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) | |
| ------------------------------------------------------------------------------- |
| |EQ.SYS.LAB.SDI|PARAMETER | WORD RANGE |UNIT|SIG |BITS|XMSN|CODE|ALPHA|SOURCE | |
| | |DEFINITION| OPER RANGE | |BIT | |INTV| |CODE |ORIGIN | |
| | |(*=REMARK)| RESOLUTION | | | | | | |BUS No.| |
| | |(X=NOTE) | ACCURACY | | | | | | |ATA REF| |
| | | | | | | | | | |CONV | |
| ------------------------------------------------------------------------------- |
| ! 354 !LRU IDENT ! ! ! ! ! 50 ! ISO! ! ! |
| ! ! ! ! ! ! ! ! ! ! ! |
| ! 356 !BITE ! ! ! ! ! ! ! ! ! |
| ! !STATUS ! ! ! ! ! 50 ! ISO! ! ! |
| ! ! ! ! ! ! ! ! ! ! ! |
| ! 377 !EQUIP ! ! ! ! ! ! ! ! ! |
| ! !IDENT ! ! ! ! !1000! BCD! ! ! |
| ------------------------------------------------------------------------------- |
The equipment code of the HF transceiver is 019.
(9) Output Discretes
These Output discretes are the same for each HF circuit.
These Output discretes are the same for each HF circuit.
| ------------------------------------------------------------------------------- |
| NAME ELECTRICAL LEVEL TO SIGNAL STATUS |
| ------------------------------------------------------------------------------- |
| KEY EVENT GND/O.C. SDAC GND=EMISSION |
| PTT GND/O.C. HF COUPLER |
| & AMU GND=EMISSION |
| RECHANNEL PULSE 5V/O.C. HF COUPLER GND=RECHANNEL |
| TUNE POWER 28V/O.C. HF GND=COUPLER |
| TRANSCEIVER TUNING |
| RELAY INTERLOCK 28V/O.C. HF 28V=KEY |
| TRANSCEIVER ENABLED |
(10) Output Analog Signals
These Output Analog Signals are the same for each HF circuit.
These Output Analog Signals are the same for each HF circuit.
| ------------------------------------------------------------------------------- |
| NAME ELECTRICAL LEVEL TO SIGNAL STATUS |
| ------------------------------------------------------------------------------- |
| AUDIO SIDETONE OUTPUT MODULATION AMU |
| SELCAL OUTPUT MODULATION AMU |
B. Output Analog Signals
The HF circuits have the same output analog signals, i.e:
The HF circuits have the same output analog signals, i.e:
| ------------------------------------------------------------------------------- |
| NAME ELECTRICAL LEVEL TO SIGNAL STATUS |
| ------------------------------------------------------------------------------- |
| AUDIO SIDETONE OUTPUT MODULATION AMU |
| SELCAL OUTPUT MODULATION AMU |
| ANTENNA OUTPUT MODULATION CPLR |
6. Component Description
A. HF Transceiver - Description FIN: 3-RE-1 FIN: 3-RE-2
The HF transceiver conforms to ARINC 600 specifications. The case size is 6cu.m.
The HF transceiver conforms to ARINC 600 specifications. The case size is 6MCU.
The HF transceiver conforms to ARINC 600 specifications. The case size is 6cu.m.
The HF transceiver conforms to ARINC 600 specifications. The case size is 6MCU.
(1) HF transceiver face
The transceiver features:
The transceiver features:
- two jacks (PHONE and MIC)
- a SQL/LAMP TEST pushbutton switch
- three red warning lights : LRU FAIL, KEY INTERLOCK, CONTROL INPUT FAIL
- a transportation handle
- an identification plate.
(2) HF transceiver back
The back comprises three connectors to enable connection with:
The back comprises three connectors to enable connection with:
- the automatic test circuits (Top Plug (TP))
- the antenna circuit and peripheral circuits (Middle Plug (MP))
- the power supply circuits (Bottom Plug (BP)).
(3) HF transceiver face
The transceiver features:
The transceiver features:
- Two jacks (PHONE and MIC)
- A TEST pushbutton switch
- A red/green warning light: LRU STATUS
- Two red warning lights : KEY INTERLOCK, CONTROL FAIL
- A transportation handle
- An identification plate.
(4) HF transceiver back
The back comprises three connectors to enable connection with:
The back comprises three connectors to enable connection with:
- the automatic test circuits (Top Plug (TP))
- the antenna circuit and peripheral circuits (Middle Plug (MP))
- the power supply circuits (Bottom Plug (BP)).
B. HF Transceiver - Characteristics
The HF transceiver complies with the standards defined in ARINC 719.
The transmission and reception of coded messages between the various control units (CFDIU, RMP) comply with ARINC 429.
The HF transceiver complies with the standards defined in ARINC 719.
The transmission and reception of coded messages between the various control units (CFDIU, RMP) comply with ARINC 429.
The HFDR transceiver complies with the standards given in ARINC 719, 615-3, 665-3 and 753.
The transmission and reception of coded messages between the different control units (CFDIU, RMP) comply with ARINC 429.
The HFDR transceivers send labels through one ARINC 429 output bus ”DLRB OUT” to the DLRB.
The HFDR transceivers receive labels through one discrete input of the Dataload enable signal (with or without the software dataloading function) and one ARINC 429 input bus signal (DLRB IN) from the DLRB.
The HF transceiver complies with the standards defined in ARINC 719.
The transmission and reception of coded messages between the various control units (CFDIU, RMP) comply with ARINC 429.
The HF transceiver complies with the standards defined in ARINC 719.
The transmission and reception of coded messages between the various control units (CFDIU, RMP) comply with ARINC 429.
The HFDR transceiver complies with the standards given in ARINC 719, 615-3, 665-3 and 753.
The transmission and reception of coded messages between the different control units (CFDIU, RMP) comply with ARINC 429.
The HFDR transceivers send labels through one ARINC 429 output bus ”DLRB OUT” to the DLRB.
The HFDR transceivers receive labels through one discrete input of the Dataload enable signal (with or without the software dataloading function) and one ARINC 429 input bus signal (DLRB IN) from the DLRB.
C. HF Transceiver - Operation
The transceiver consists of five functional units: frequency control circuit, power supply, receiver-exciter, transmitter, synthesizer.
The transceiver consists of five functional units: frequency control circuit, power supply, receiver-exciter, transmitter, synthesizer.
(1) Frequency control provides:
The microcomputer controls the timing and distribution of the decoded digits to the frequency synthesizer.
Frequency synthesizer generates 500 KHz, 69.3 MHz (USB) upper side band, 70.3 MHz (LSB) lower side band and 71.8 to 99.7999 MHz signals that are derived from 9.9 MHz frequency standard.
The receiver receives, amplifies and detects incoming AM and/or USB/LSB signals from 2.0 to 29.9999 MHz.
The receiver enables reception of the audio data and SELCAL modes.
The exciter section produces either USB/LSB or AM 2.0 to 29.9999 MHz signals.
The transmitter consists of a solid-state power amplifier with a 7-band low-pass filter.
The power amplifier amplifies the radio frequency input of 100 mW nominal peak envelope power (pep) to a 400 W pep/125 W average level.
A band-switched lows-pass filter filters the output of the power amplifier.
- BCD (Binary coded decimal) frequency information to frequency synthesizer
- frequency band information to the low-pass filter
- mode of operation to receiver-exciter
- rechannel detection signal to the antenna coupler.
The microcomputer controls the timing and distribution of the decoded digits to the frequency synthesizer.
Frequency synthesizer generates 500 KHz, 69.3 MHz (USB) upper side band, 70.3 MHz (LSB) lower side band and 71.8 to 99.7999 MHz signals that are derived from 9.9 MHz frequency standard.
The receiver receives, amplifies and detects incoming AM and/or USB/LSB signals from 2.0 to 29.9999 MHz.
The receiver enables reception of the audio data and SELCAL modes.
The exciter section produces either USB/LSB or AM 2.0 to 29.9999 MHz signals.
The transmitter consists of a solid-state power amplifier with a 7-band low-pass filter.
The power amplifier amplifies the radio frequency input of 100 mW nominal peak envelope power (pep) to a 400 W pep/125 W average level.
A band-switched lows-pass filter filters the output of the power amplifier.
(2) Power supply
The transceiver is supplied with three-phase 115VAC, 400 Hz power.
One of the phases supplies the antenna coupler through the transceiver.
The power supply generates filtered + 51VDC, together with four voltages. These are provided from filtered 28VDC for the other circuits and are + 20 V, + 10 V, + 5 V, - 12 V.
The transceiver is supplied with three-phase 115VAC, 400 Hz power.
One of the phases supplies the antenna coupler through the transceiver.
The power supply generates filtered + 51VDC, together with four voltages. These are provided from filtered 28VDC for the other circuits and are + 20 V, + 10 V, + 5 V, - 12 V.
(3) Receiver
In receive mode, the antenna of the HF transceiver receives a signal of a frequency comprised between 2 and 29.9999 MHz.
This signal is modulated in AM, USB or LSB mode.
The signal from the antenna coupler is transmitted through the antenna relay to a bandpass filter. The filter covers the frequency range from 2 to 30 MHz.
The filter output passes through a transformer to an attenuator.
The AGC (Automatic Gain Control) circuit and RF sensibility circuit control the attenuator.
The signal is then amplified in a wideband amplifier and fed to a first mixer.
This mixer receives a signal from the antenna (2 to 29.9999 MHz) and a signal between 71.8 and 99.7999 MHz from the synthesizer.
A 69.8 MHz frequency signal is then obtained from the mixer.
This signal is filtered, amplified and fed to a second amplifier.
This second mixer also receives a 69.3 MHz signal in USB and AM operation or 70.3 MHz in LSB operation. At the mixer output, a second intermediate frequency of 500 KHz is obtained.
This 500 KHz signal is processed in two different ways depending on the mode of operation, SSB or AM.
In receive mode, the antenna of the HF transceiver receives a signal of a frequency comprised between 2 and 29.9999 MHz.
This signal is modulated in AM, USB or LSB mode.
The signal from the antenna coupler is transmitted through the antenna relay to a bandpass filter. The filter covers the frequency range from 2 to 30 MHz.
The filter output passes through a transformer to an attenuator.
The AGC (Automatic Gain Control) circuit and RF sensibility circuit control the attenuator.
The signal is then amplified in a wideband amplifier and fed to a first mixer.
This mixer receives a signal from the antenna (2 to 29.9999 MHz) and a signal between 71.8 and 99.7999 MHz from the synthesizer.
A 69.8 MHz frequency signal is then obtained from the mixer.
This signal is filtered, amplified and fed to a second amplifier.
This second mixer also receives a 69.3 MHz signal in USB and AM operation or 70.3 MHz in LSB operation. At the mixer output, a second intermediate frequency of 500 KHz is obtained.
This 500 KHz signal is processed in two different ways depending on the mode of operation, SSB or AM.
(a) SSB mode
Whatever the signal received, USB or LSB, the 500 KHz signal obtained from the transformation of the previous frequencies is always a LSB signal.
This signal is filtered, amplified and then applied to a mixer detector.
The mixer detector receives the LSB signal of 500 KHz and the square wave signal of 500 KHz from the synthesizer. The output is the detected audio signal.
This signal is amplified and fed to the AGC and AF input circuit which receives signal from the AM and SSB channels.
The AF input circuit supplies the audio output and the DATA output through a final amplifier controlled by a squelch circuit.
Whatever the signal received, USB or LSB, the 500 KHz signal obtained from the transformation of the previous frequencies is always a LSB signal.
This signal is filtered, amplified and then applied to a mixer detector.
The mixer detector receives the LSB signal of 500 KHz and the square wave signal of 500 KHz from the synthesizer. The output is the detected audio signal.
This signal is amplified and fed to the AGC and AF input circuit which receives signal from the AM and SSB channels.
The AF input circuit supplies the audio output and the DATA output through a final amplifier controlled by a squelch circuit.
(b) AM mode
The 500 KHz signal from the second mixer is filtered and amplified.
This amplified signal is transmitted to the AGC circuit and to the AF circuits.
At audio output, the signal is fed to the AF input circuit described above.
The 500 KHz signal from the second mixer is filtered and amplified.
This amplified signal is transmitted to the AGC circuit and to the AF circuits.
At audio output, the signal is fed to the AF input circuit described above.
(4) Transmitter
The modulation signal (audio, data) is supplied to a compressor/ amplifier.
The audio signal is modulated into a modulator balanced by an injection signal of 500 KHz from a frequency synthesizer.
The 500 KHz carrier is cancelled and the two sidebands only remain at modulator output. A first amplifier amplifies the signal. Then the signal is applied to a Lower Side Band (LSB) mechanical filter.
The filter removes the Upper Side Band (USB).
The signal is then amplified in a second 500 KHz amplifier before it is applied to a first mixer.
When transmitted in AM mode, the second 500 KHz amplifier receives a 500 KHz carrier signal from the synthesizer.
The 500 KHz signal, with or without a carrier, is then mixed in a mixer with a signal of 69.3 MHz in USB mode and a signal of 70.3 MHz in LSB mode.
These signals from the frequency synthesizer produce a signal of 69.8 MHz frequency by beating with the 500 KHz signal of the lower band.
The 69.8 MHz frequency signal is fed to a second mixer through a crystal filter.
Within the second mixer, the 69.8 MHz signal is mixed with a frequency signal between 71.8 MHz and 99.7999 MHz from the synthesizer.
The resulting signal is between 2 and 29.9999 MHz.
This output signal is amplified, then filtered.
An attenuator, controlled by an automatic load control (ALC) system, maintains constant the signal output level.
This signal is then applied to a four-stage power amplifier which raises the power to 400 W, peak-to-peak. The power amplifier stage has protective circuits which provide instantaneous reduction of the output power in the event of component overload or overheating.
The signal is routed through seven filters which can be switched in by a motor, according to the useful frequency. These filters cover the frequency band from 2 to 29.999 MHz and remove the harmonics of the useful frequency. The signal is then transmitted to the antenna coupler and antenna through an antenna relay and internal directional wattmeter.
Transmitted and reflected power measured by the wattmeter generates a voltage.
The voltage is used for modulation control, automatic load control (ALC) attenuator and power amplifier protection.
The modulation signal (audio, data) is supplied to a compressor/ amplifier.
The audio signal is modulated into a modulator balanced by an injection signal of 500 KHz from a frequency synthesizer.
The 500 KHz carrier is cancelled and the two sidebands only remain at modulator output. A first amplifier amplifies the signal. Then the signal is applied to a Lower Side Band (LSB) mechanical filter.
The filter removes the Upper Side Band (USB).
The signal is then amplified in a second 500 KHz amplifier before it is applied to a first mixer.
When transmitted in AM mode, the second 500 KHz amplifier receives a 500 KHz carrier signal from the synthesizer.
The 500 KHz signal, with or without a carrier, is then mixed in a mixer with a signal of 69.3 MHz in USB mode and a signal of 70.3 MHz in LSB mode.
These signals from the frequency synthesizer produce a signal of 69.8 MHz frequency by beating with the 500 KHz signal of the lower band.
The 69.8 MHz frequency signal is fed to a second mixer through a crystal filter.
Within the second mixer, the 69.8 MHz signal is mixed with a frequency signal between 71.8 MHz and 99.7999 MHz from the synthesizer.
The resulting signal is between 2 and 29.9999 MHz.
This output signal is amplified, then filtered.
An attenuator, controlled by an automatic load control (ALC) system, maintains constant the signal output level.
This signal is then applied to a four-stage power amplifier which raises the power to 400 W, peak-to-peak. The power amplifier stage has protective circuits which provide instantaneous reduction of the output power in the event of component overload or overheating.
The signal is routed through seven filters which can be switched in by a motor, according to the useful frequency. These filters cover the frequency band from 2 to 29.999 MHz and remove the harmonics of the useful frequency. The signal is then transmitted to the antenna coupler and antenna through an antenna relay and internal directional wattmeter.
Transmitted and reflected power measured by the wattmeter generates a voltage.
The voltage is used for modulation control, automatic load control (ALC) attenuator and power amplifier protection.
(5) Synthesizer
The frequency synthesizer provides three frequency signals:
The frequency synthesizer provides three frequency signals:
- a variable frequency sine wave between 71.8 and 99.7999 MHz
- a fixed frequency square wave of 500 KHz
- a USB 69.3 MHz sine wave or a LSB 70.3 MHz sine wave signal.
(a) 500 KHz signal
A 9.9 MHz crystal oscillator generates the 500 KHz signal. The signal is then divided. A monitoring circuit compares the signal from the crystal oscillator with the frequency standard in order to obtain a great stability.
The 500 KHz signal is used in the balanced modulator and in the mixer detector used in SSB reception.
A 9.9 MHz crystal oscillator generates the 500 KHz signal. The signal is then divided. A monitoring circuit compares the signal from the crystal oscillator with the frequency standard in order to obtain a great stability.
The 500 KHz signal is used in the balanced modulator and in the mixer detector used in SSB reception.
(b) 69.3 MHz (USB) and 70.3 MHz (LSB) signals
A 69.3 or 70.3 MHz voltage-controlled oscillator (VCO) delivers two signals.
The signal is divided then compared with a 100 KHz signal delivered by the frequency standard (9.9 MHz).
These frequencies are used in a mixer to produce an intermediate frequency of 69.8 MHz in transmission or a 500 KHz signal in reception.
A 69.3 or 70.3 MHz voltage-controlled oscillator (VCO) delivers two signals.
The signal is divided then compared with a 100 KHz signal delivered by the frequency standard (9.9 MHz).
These frequencies are used in a mixer to produce an intermediate frequency of 69.8 MHz in transmission or a 500 KHz signal in reception.
(c) 71.8 to 99.7999 MHz signal
Two phase-locked loops produce this signal which is used as a local oscillator. With this system, the local oscillator loop output is mixed with the output signal of the other loop oscillator in order to ensure frequency accuracy.
These two loops utilize reference signals of 9.9 KHz and 10 KHz from the frequency standard.
Two phase-locked loops produce this signal which is used as a local oscillator. With this system, the local oscillator loop output is mixed with the output signal of the other loop oscillator in order to ensure frequency accuracy.
These two loops utilize reference signals of 9.9 KHz and 10 KHz from the frequency standard.
(6) ARINC 429 message decoder selection
The RMP controls the various operations which are transmitted to the transceiver by a numeric message in compliance with ARINC 429.
This message can be received by the port A or the port B of the transceiver. The RMP performs the selection by a discrete.
The message can be made up of one word of 32 Bits or two words of 32 bits for the 100 Hz channel spacings or CW mode.
A microprocessor performs the decoding of the frequency and mode (AM or USB).
The microprocessor checks the message from the RMP and controls the system operation.
In case of failure, it controls the illumination of the lights located on the face and/or acts on the transmitter.
The RMP controls the various operations which are transmitted to the transceiver by a numeric message in compliance with ARINC 429.
This message can be received by the port A or the port B of the transceiver. The RMP performs the selection by a discrete.
The message can be made up of one word of 32 Bits or two words of 32 bits for the 100 Hz channel spacings or CW mode.
A microprocessor performs the decoding of the frequency and mode (AM or USB).
The microprocessor checks the message from the RMP and controls the system operation.
In case of failure, it controls the illumination of the lights located on the face and/or acts on the transmitter.
(7) Test
Correct operation of the transceiver can be checked by means of the various lights on its face.
Correct operation of the transceiver can be checked by means of the various lights on its face.
(a) LRU FAIL red light (LED)
LRU FAIL red light comes on in the event of a transceiver warning such as:
LRU FAIL red light comes on in the event of a transceiver warning such as:
- output power drop
- microprocessor failure
- synthesizer failure.
(b) KEY INTERLOCK red light (LED)
KEY INTERLOCK red light comes on when a failure is detected in antenna circuit, such as:
KEY INTERLOCK red light comes on when a failure is detected in antenna circuit, such as:
- coupler failure
- excessive tuning time
- excessive antenna reactance.
(c) CONTROL INPUT FAIL red light (LED)
CONTROL INPUT FAIL red light comes on when there are serial message faults such as:
CONTROL INPUT FAIL red light comes on when there are serial message faults such as:
- absence of label
- insufficient refresh rate
- message not valid.
(d) SQL/LAMP TEST pushbutton switch
When pressing the SQL/LAMP TEST pushbutton switch, all the lights come on, the squelch is disabled and causes background noise to be heard in the headset.
When pressing the SQL/LAMP TEST pushbutton switch, all the lights come on, the squelch is disabled and causes background noise to be heard in the headset.
D. HF Antenna Coupler - Description
The antenna coupler enables matching of the aircraft HF shunt-type antenna with the output circuit (50 ohms) of the HF transceiver.
The coupler is a pressurized sealed box.
The antenna coupler enables matching of the aircraft HF shunt-type antenna with the output circuit (50 ohms) of the HF transceiver.
The coupler is a pressurized sealed box.
The antenna coupler enables matching of the aircraft HF shunt-type antenna with the output circuit (50 ohms) of the HF transceiver.
The coupler is a pressurized sealed box.
The antenna coupler enables matching of the aircraft HF shunt-type antenna with the output circuit (50 ohms) of the HF transceiver.
The coupler is a pressurized sealed box.
(1) The face features:
- a connector J1 for connection with the transmitter
- a coaxial connector J2 to connect the coaxial cable from the transmitter
- a connector J3 for test equipment connection
- a pressurizing valve
- a fault warning light
- a handle
- an identification plate.
(2) The face features:
- a connector J1 for connection with the transmitter
- a coaxial connector J2 to connect the coaxial cable from the transmitter
- a pressurizing valve
- a handle
- an identification plate.
(3) The back carries:
- a connector providing connection between the coupler and the antenna.
E. HF Antenna Coupler - Operation
The coupler is tuned in six sequences: start, reception/standby, tune A, tune B, tune C and operational position.
A sequence counter controls the six sequences.
The counter starts the next sequence only when all the conditions related to the previous one are satisfied. If a failure is detected during the tuning phase, tuning is stopped.
The tuning phase is initiated at HF system energization or when a new frequency is selected. The tune control line is then grounded.
Servomotors controlled by servo-amplifiers place the tuning elements in start position.
The coupler is tuned in six sequences: start, reception/standby, tune A, tune B, tune C and operational position.
A sequence counter controls the six sequences.
The counter starts the next sequence only when all the conditions related to the previous one are satisfied. If a failure is detected during the tuning phase, tuning is stopped.
The tuning phase is initiated at HF system energization or when a new frequency is selected. The tune control line is then grounded.
Servomotors controlled by servo-amplifiers place the tuning elements in start position.
(1) Start sequence
In this sequence capacitors C2, C3 and inductor L2 are positioned so that they present minimum impedance to signals.
In addition, switch S4 disconnects inductor L2 from the circuit.
When all these conditions are satisfied, a pulse is applied to the sequence counter. The system is forced to the reception/standby phase.
In this sequence capacitors C2, C3 and inductor L2 are positioned so that they present minimum impedance to signals.
In addition, switch S4 disconnects inductor L2 from the circuit.
When all these conditions are satisfied, a pulse is applied to the sequence counter. The system is forced to the reception/standby phase.
(2) Reception/standby sequence
In this position, the coupler is in reception condition and ready for a tuning cycle.
PTT control grounding causes interlocking of couplers (case of dual system). A pulse is applied to the sequence counter and the system is forced to the next tuning sequence: tune A.
In this position, the coupler is in reception condition and ready for a tuning cycle.
PTT control grounding causes interlocking of couplers (case of dual system). A pulse is applied to the sequence counter and the system is forced to the next tuning sequence: tune A.
(3) Tune A sequence
The purpose of tune A is to adjust the antenna circuits so that HF signal current and voltage are in phase.
To this end, after detection, a discriminator delivers an error signal proportional to the phase difference during 50 ms. The polarity of this signal determines the elements required to achieve tuning.
Two cases may arise:
The purpose of tune A is to adjust the antenna circuits so that HF signal current and voltage are in phase.
To this end, after detection, a discriminator delivers an error signal proportional to the phase difference during 50 ms. The polarity of this signal determines the elements required to achieve tuning.
Two cases may arise:
(a) Positive error signal
The antenna circuit impedance is inductive and is below the parallel resonance. The error signal is brought to zero by acting on capacitor C3.
The antenna circuit impedance is inductive and is below the parallel resonance. The error signal is brought to zero by acting on capacitor C3.
(b) Negative or null error voltage
Two cases may arise:
Two cases may arise:
- the antenna circuit impedance is above the parallel resonance (high band):
The error signal is brought to a positive value through variation of inductance L2 and brought to a null value by capacitor C3. - the antenna circuit impedance is below the parallel resonance (low band):
The error signal is brought to a positive value through variation of capacitor C2 and then to a null value by capacitor C3.
(4) Tune B sequence
The purpose of tune B is to match the antenna load with the transmitter output circuits.
To this end, a load discriminator compares the HF current and voltage.
This comparison gives an error voltage proportional to the difference between the HF circuit impedance and an impedance of 50 ohms.
Two cases may arise:
The purpose of tune B is to match the antenna load with the transmitter output circuits.
To this end, a load discriminator compares the HF current and voltage.
This comparison gives an error voltage proportional to the difference between the HF circuit impedance and an impedance of 50 ohms.
Two cases may arise:
(a) Load lower than 50 ohms (negative). It is not necessary to modify the tuning circuits: the sequence counter circuit controls change to the next sequence, i.e. tune C.
(b) Load equal or greater than 50 ohms (positive)
Two cases may arise:
Two cases may arise:
- inductor L2 is used in the tune A sequence. This inductance is re-used to decrease the reflected power below a preset level
- inductor L2 is not re-used to achieve tune A sequence.
It is brought to its maximum inductance. As this tuning modifies phase tuning, capacitor C3 must be re-adjusted. When the phase error voltage is null:
. if the load error voltage is negative the next sequence starts,
. otherwise inductor L2 is adjusted to decrease reflected power to a preset level.
When reflected power is decreased, the sequence counter starts the next sequence i.e. tune C.
(5) Tune C sequence
The purpose of the tune C is to complete previous adjustments and obtain a VSWR (voltage standing-wave ratio) lower than 1.3.
In this sequence, capacitor C3 is adjusted to maintain voltage-current phase shift to zero. Capacitor C2 and/or inductor L2 are tuned to bring reflected power below a preset level.
If inductor L2 has not been used in tune A and B:
The purpose of the tune C is to complete previous adjustments and obtain a VSWR (voltage standing-wave ratio) lower than 1.3.
In this sequence, capacitor C3 is adjusted to maintain voltage-current phase shift to zero. Capacitor C2 and/or inductor L2 are tuned to bring reflected power below a preset level.
If inductor L2 has not been used in tune A and B:
- capacitor C2 is adjusted until the reflected power value decreases below a preset level corresponding to a VSWR lower than 1.3
- inductor L2 is adjusted again so that VSWR goes below a preset level.
- capacitor C2 is tuned again until VSWR is lower than 1.3.
(6) Operational position
In this sequence, the tuning control line is disconnected from ground.
The antenna coupler can operate.
If a new frequency is selected:
In this sequence, the tuning control line is disconnected from ground.
The antenna coupler can operate.
If a new frequency is selected:
- the antenna coupler goes back to the start sequence and the tuning cycle starts again.
F. HF Antenna Coupler - Fault indications
Fault information of the coupler can be transmitted by discretes to the HF transceiver.
In this case, the HF transceiver will take these items of information into account and will transmit them to the CFDIU.
Fault information of the coupler can be transmitted by discretes to the HF transceiver.
In this case, the HF transceiver will take these items of information into account and will transmit them to the CFDIU.
7. Operation
A. Receive Function
The HF audio integrating signals transmitted by the stations are picked-up by the antenna and transmitted to the antenna coupler.
The coupler adapts the impedance between the antenna and HF transceiver.
The signal from the HF coupler is transmitted to the HF transceiver by a coaxial cable.
The HF transceiver, tuned on the selected frequency by one of the RMP, demodulates HF signals into AF signals.
The AF signals are transmitted via the AMU, to the audio equipment or SELCAL system.
The HF audio integrating signals transmitted by the stations are picked-up by the antenna and transmitted to the antenna coupler. The coupler adapts the impedance between the antenna and the HF transceiver. The signal from the HF coupler is transmitted to the HF transceiver by a coaxial cable.
In voice mode, the HF transceiver, tuned to the selected frequency by one RMP, demodulates HF signals into AF signals.
The AF signals are transmitted via the AMU, to the audio equipment or SELCAL system.
In data mode, the HF1 transceiver, tuned to the auto-selected frequency, demodulates the HF1 received signals into digital information, which is transmitted to the ATSU (through ARINC 429 HS bus).
The HF audio integrating signals transmitted by the stations are picked-up by the antenna and transmitted to the antenna coupler. The coupler adapts the impedance between the antenna and the HF transceiver. The signal from the HF coupler is transmitted to the HF transceiver by a coaxial cable.
In voice mode, the HF transceiver, tuned to the selected frequency by one RMP, demodulates HF signals into AF signals.
The AF signals are transmitted via the AMU, to the audio equipment or SELCAL system.
In data mode, the HF1 transceiver, tuned to the auto-selected frequency, demodulates the HF1 received signals into digital information, which is transmitted to the ATSU (through ARINC 429 HS bus).
The HF audio integrating signals transmitted by the stations are picked-up by the antenna and transmitted to the antenna coupler.
The coupler adapts the impedance between the antenna and HF transceiver.
The signal from the HF coupler is transmitted to the HF transceiver by a coaxial cable.
The HF transceiver, tuned on the selected frequency by one of the RMP, demodulates HF signals into AF signals.
The AF signals are transmitted via the AMU, to the audio equipment or SELCAL system.
The HF audio integrating signals transmitted by the stations are picked-up by the antenna and transmitted to the antenna coupler. The coupler adapts the impedance between the antenna and the HF transceiver. The signal from the HF coupler is transmitted to the HF transceiver by a coaxial cable.
In voice mode, the HF transceiver, tuned to the selected frequency by one RMP, demodulates HF signals into AF signals.
The AF signals are transmitted via the AMU, to the audio equipment or SELCAL system.
In data mode, the HF1 transceiver, tuned to the auto-selected frequency, demodulates the HF1 received signals into digital information, which is transmitted to the ATSU (through ARINC 429 HS bus).
The HF audio integrating signals transmitted by the stations are picked-up by the antenna and transmitted to the antenna coupler. The coupler adapts the impedance between the antenna and the HF transceiver. The signal from the HF coupler is transmitted to the HF transceiver by a coaxial cable.
In voice mode, the HF transceiver, tuned to the selected frequency by one RMP, demodulates HF signals into AF signals.
The AF signals are transmitted via the AMU, to the audio equipment or SELCAL system.
In data mode, the HF1 transceiver, tuned to the auto-selected frequency, demodulates the HF1 received signals into digital information, which is transmitted to the ATSU (through ARINC 429 HS bus).
B. Transmit Function
The AF signals from the microphones are transmitted to the HF transceiver through the AMU.
The HF transceiver tuned on the frequency selected by one of the RMP, transforms the AF signals into HF modulated signals.
The HF signals are fed to the antenna by the coaxial cable and antenna coupler.
They are then transmitted to the various stations.
A connection between the HF transceiver and the SDAC enables to record the use of the HF system in transmit mode.
The connection is obtained through the PTT switch.
Before transmissions, the HF transceiver has to be tuned to the new frequency selected by one RMP. This tuning consists in activating the PTT switch, a 1000 Hz signal is heard during several seconds. The new antenna coupler is now able to reduce the tuning duration thanks to a "learning mode" which memorizes several last tuned frequencies.
In voice mode, the AF signals from the microphones are transmitted to the HF transceiver through the AMU.
The HF transceiver tuned to the frequency selected by one RMP, transforms the AF signals into HF modulated signals. The HF signals are fed to the antenna by the coaxial cable and antenna coupler. They are then transmitted to the various stations.
A connection between the HF transceiver and the SDAC enables to record the use of the HF system in transmit mode. The connection is obtained through the KEY EVENT output information of the HF transceiver.
In data mode, the digital information is transmitted from the ATSU to the HF1 transceiver (tuned to the frequency auto-selected and transmitted to the transceiver through ARINC 429 HS bus) which modulates it.
The HF signals are fed to the antenna by a coaxial cable. They are then transmitted to the various stations.
Before transmissions, the HF transceiver has to be tuned to the new frequency selected by one RMP. This tuning consists in activating the PTT switch, a 1000 Hz signal is heard during several seconds. The new antenna coupler is now able to reduce the tuning duration thanks to a "learning mode" which memorizes several last tuned frequencies.
In voice mode, the AF signals from the microphones are transmitted to the HF transceiver through the AMU.
The HF transceiver tuned to the frequency selected by one RMP, transforms the AF signals into HF modulated signals. The HF signals are fed to the antenna by the coaxial cable and antenna coupler. They are then transmitted to the various stations.
A connection between the HF transceiver and the SDAC enables to record the use of the HF system in transmit mode. The connection is obtained through the KEY EVENT output information of the HF transceiver.
In data mode, the digital information is transmitted from the ATSU to the HF1 transceiver (tuned to the frequency auto-selected and transmitted to the transceiver through ARINC 429 HS bus) which modulates it.
The HF signals are fed to the antenna by a coaxial cable. They are then transmitted to the various stations.
On the ground, the GND HF DATA LINK pushbutton switch is used to override the data transmission inhibition of the HF1 transceiver.
The AF signals from the microphones are transmitted to the HF transceiver through the AMU.
The HF transceiver tuned on the frequency selected by one of the RMP, transforms the AF signals into HF modulated signals.
The HF signals are fed to the antenna by the coaxial cable and antenna coupler.
They are then transmitted to the various stations.
A connection between the HF transceiver and the SDAC enables to record the use of the HF system in transmit mode.
The connection is obtained through the PTT switch.
Before transmissions, the HF transceiver has to be tuned to the new frequency selected by one RMP. This tuning consists in activating the PTT switch, a 1000 Hz signal is heard during several seconds. The new antenna coupler is now able to reduce the tuning duration thanks to a "learning mode" which memorizes several last tuned frequencies.
In voice mode, the AF signals from the microphones are transmitted to the HF transceiver through the AMU.
The HF transceiver tuned to the frequency selected by one RMP, transforms the AF signals into HF modulated signals. The HF signals are fed to the antenna by the coaxial cable and antenna coupler. They are then transmitted to the various stations.
A connection between the HF transceiver and the SDAC enables to record the use of the HF system in transmit mode. The connection is obtained through the KEY EVENT output information of the HF transceiver.
In data mode, the digital information is transmitted from the ATSU to the HF1 transceiver (tuned to the frequency auto-selected and transmitted to the transceiver through ARINC 429 HS bus) which modulates it.
The HF signals are fed to the antenna by a coaxial cable. They are then transmitted to the various stations.
Before transmissions, the HF transceiver has to be tuned to the new frequency selected by one RMP. This tuning consists in activating the PTT switch, a 1000 Hz signal is heard during several seconds. The new antenna coupler is now able to reduce the tuning duration thanks to a "learning mode" which memorizes several last tuned frequencies.
In voice mode, the AF signals from the microphones are transmitted to the HF transceiver through the AMU.
The HF transceiver tuned to the frequency selected by one RMP, transforms the AF signals into HF modulated signals. The HF signals are fed to the antenna by the coaxial cable and antenna coupler. They are then transmitted to the various stations.
A connection between the HF transceiver and the SDAC enables to record the use of the HF system in transmit mode. The connection is obtained through the KEY EVENT output information of the HF transceiver.
In data mode, the digital information is transmitted from the ATSU to the HF1 transceiver (tuned to the frequency auto-selected and transmitted to the transceiver through ARINC 429 HS bus) which modulates it.
The HF signals are fed to the antenna by a coaxial cable. They are then transmitted to the various stations.
On the ground, the GND HF DATA LINK pushbutton switch is used to override the data transmission inhibition of the HF1 transceiver.
C. Indication of Transmission Out of Frequency Range
The HF system is designed to operate within the frequency range from 2.8 to 23.999 MHz.
However, the RMP enables frequency display in the 2 to 29.999 MHz range.
If the out-of-range values of the HF transceiver are displayed on the RMP, the operating anomaly is indicated as follows:
The HF system is designed to operate within the frequency range from 2.8 to 23.999 MHz.
However, the RMP enables frequency display in the 2 to 29.999 MHz range.
If the out-of-range values of the HF transceiver are displayed on the RMP, the operating anomaly is indicated as follows:
- at first activation of the PTT switch: a 1000 Hz audio signal is triggered
- interruption of the signal after 15 s approximately
- triggering of the signal at each attempt to transmit.
D. HF Data Link ground network
One service provider (ARINC) proposes the HFDL ground network with a worldwide coverage including polar areas. Its ground stations cover a radius if approximately 3,000 miles and may cover more than one service region. The continuous communications are offered thanks to overlapping coverage with a total of about 13 ground stations fielded worldwide and with several frequencies for each of them.
One service provider (ARINC) proposes the HFDL ground network with a worldwide coverage including polar areas. Its ground stations cover a radius if approximately 3,000 miles and may cover more than one service region. The continuous communications are offered thanks to overlapping coverage with a total of about 13 ground stations fielded worldwide and with several frequencies for each of them.
8. Test
A. CFDS Interface
(1) System description - Architecture
The BITE facilitates maintenance on in-service aircraft.
The BITE detects and determines a failure related to the HF system.
The BITE of the HF transceiver is connected to the Centralized Fault Display Interface Unit (CFDIU) (Ref. ATA 31-32).
The BITE:
The BITE facilitates maintenance on in-service aircraft.
The BITE detects and determines a failure related to the HF system.
The BITE of the HF transceiver is connected to the Centralized Fault Display Interface Unit (CFDIU) (Ref. ATA 31-32).
The BITE:
- transmits permanently HF system status and its identification message to the CFDIU
- memorizes the failures occurred during the last 63 flight segments
- monitors data input from the various peripherals (RMP and CFDIU)
- transmits to the CFDIU the result of the tests performed and self-tests
- can communicate with the CFDIU by the menus.
- the normal mode
- the menu mode.
(a) The normal mode
During the normal mode the BITE monitors cyclically the status of the HF system. It transmits its information to the CFDIU during the flight concerned.
In case of fault detection the BITE stores the information in the fault memories.
These items of information are transmitted to the CFDIU every 100 ms by an ARINC 429 message with label 356.
During the normal mode the BITE monitors cyclically the status of the HF system. It transmits its information to the CFDIU during the flight concerned.
In case of fault detection the BITE stores the information in the fault memories.
These items of information are transmitted to the CFDIU every 100 ms by an ARINC 429 message with label 356.
(b) The menu mode
The menu mode can only be activated on the ground.
This mode enables communication between the CFDIU and the HF transceiver BITE.
This is by means of the MCDU.
The HF transceiver menu mode is composed of:
The menu mode can only be activated on the ground.
This mode enables communication between the CFDIU and the HF transceiver BITE.
This is by means of the MCDU.
The HF transceiver menu mode is composed of:
- LAST LEG REPORT
- PREVIOUS LEGS REPORT
- LRU IDENTIFICATION
- CURRENT STATUS.
(2) System description - Architecture
The BITE facilitates maintenance on in-service aircraft.
The BITE detects and determines a failure related to the HF system.
The BITE of the HF transceiver is connected to the CFDIU (Ref. ATA 31-32).
The units tested are the transceiver and the coupler.
The BITE:
The BITE facilitates maintenance on in-service aircraft.
The BITE detects and determines a failure related to the HF system.
The BITE of the HF transceiver is connected to the CFDIU (Ref. ATA 31-32).
The units tested are the transceiver and the coupler.
The BITE:
- transmits permanently HF system status and its identification message to the CFDIU.
- memorizes the failures occurred during the last 63 flight segments,
- monitors data input from the various peripherals (RMP, CFDIU and ATSU),
- transmits to the CFDIU the result of the tests performed and self-tests,
- can communicate with the CFDIU by the menus.
- the normal mode,
- the interactive mode.
(a) Normal mode
In normal mode the BITE monitors cyclically the status of the HF system. It transmits its information to the CFDIU during the flight concerned.
In case of fault detection, the BITE stores the information in the fault memories.
These items of information are transmitted to the CFDIU every 250 ms maximum by an ARINC 429 message with label 356.
In normal mode the BITE monitors cyclically the status of the HF system. It transmits its information to the CFDIU during the flight concerned.
In case of fault detection, the BITE stores the information in the fault memories.
These items of information are transmitted to the CFDIU every 250 ms maximum by an ARINC 429 message with label 356.
(b) Interactive mode
The interactive mode can only be activated on the ground.
This mode enables communication between the CFDIU and the HF transceiver BITE.
This is by means of the MCDU.
The HF transceiver interactive mode is composed of:
The interactive mode can only be activated on the ground.
This mode enables communication between the CFDIU and the HF transceiver BITE.
This is by means of the MCDU.
The HF transceiver interactive mode is composed of:
- LAST LEG REPORT
- PREVIOUS LEGS REPORT
- LRU IDENTIFICATION
- TEST
- CLASS 3 FAULTS
- GROUND REPORT
- TROUBLE SHOOTING DATA
- GROUND SCANNING
(c) Reporting function description
- The tables below give the list of internal/external failures.
------------------------------------------------------------------------------- | | COCKPIT EFFECT | |CONSEQUENCE| MAINTENANCE | | INTERNAL |----------------|DETECTION|ON THE |-------------------------| | FAILURES | LOCAL |ECAM|LVL| |SYSTEM |CLASS|MESSAGE |RECOMMEN- | | | | | | | | |LABEL356|DED ACTION| ------------------------------------------------------------------------------- ! HF XCVR ! ! ! !Permanent!Loss of the! 1 !23-11-33! Replace ! ! FAULT ! ! ! !Moni- !considered ! ! HFx ! HF ! !-Voltage / ! ! ! !toring + ! HF System ! ! (3REx) ! XCVR ! !Supply ! ! ! !Moni- ! ! !(x=1or2)! ! !Voltage out ! ! ! !toring ! ! ! ! ! !of range ! ! ! !during ! ! ! ! ! !-Power sup- ! ! ! !xmsn ! ! ! ! ! !ply too high! ! ! ! ! ! ! ! ! !-Loss of syn! ! ! ! ! ! ! ! ! !thesizer lock ! ! ! ! ! ! ! ! !-RF transmit! ! ! ! ! ! ! ! ! !too low ! ! ! ! ! ! ! ! ! !-Amplifier ! ! ! ! ! ! ! ! ! !too low or ! ! ! ! ! ! ! ! ! !too high ! ! ! ! ! ! ! ! ! ------------------------------------------------------------------------------- ! HF XCVR ! ! ! !Permanent!Loss of the! 1 !23-11-33! Check: ! ! FAULT ! ! ! !Moni- !considered ! ! HFx !- HF XCVR ! !-Freq ctl ! ! ! !toring + ! HF System ! ! (3REx)/!- HF ! !microproce- ! ! ! !Moni- ! ! ! COAX ! coaxial ! !ssor failure! ! ! !toring ! ! !(x=1or2)! cable ! !-Loss of ! ! ! !during ! ! ! ! ! !synthesizer ! ! ! !xmsn ! ! ! ! ! !lock ! ! ! ! ! ! ! ! ! !-RF transmit! ! ! ! ! ! ! ! ! !too low ! ! ! ! ! ! ! ! ! !(<30W) in ! ! ! ! ! ! ! ! ! !AM Mode ! ! ! ! ! ! ! ! ! ------------------------------------------------------------------------------- !COUPLER ! ! ! !Permanent!Loss of the! 1 !23-11-33!Check: ! !FAULT ! ! ! !Moni- !considered ! !HFx CPLR!-HF XCVR ! !-Failure to ! ! ! !toring + !HF System ! !(4REx)/ !-HF CPLR ! !tune within ! ! ! !Moni- ! ! !FEEDER !-HFcoaxial! !15s with RF ! ! ! !toring ! ! !(6REx)/ ! cable ! !applied ! ! ! !during ! ! !ANTENNA !-HF feeder! !-Failure of ! ! ! !xmsn ! ! !(5RE) !-HF ant ! !tuning ! ! ! ! ! ! !(x=1or2)! ! !elements ! ! ! ! ! ! ! ! ! !to home ! ! ! ! ! ! ! ! ! !within 15s ! ! ! ! ! ! ! ! ! !-Occurrence ! ! ! ! ! ! ! ! ! !of an Arc ! ! ! ! ! ! ! ! ! !-Pressure ! ! ! ! ! ! ! ! ! !fault ! ! ! ! ! ! ! ! ! !-Failure to ! ! ! ! ! ! ! ! ! !tune due to ! ! ! ! ! ! ! ! ! !insufficient! ! ! ! ! ! ! ! ! !RF power ! ! ! ! ! ! ! ! ! !from XCVR ! ! ! ! ! ! ! ! ! !(link with ! ! ! ! ! ! ! ! ! !an HF XCVR ! ! ! ! ! ! ! ! ! !fault) ! ! ! ! ! ! ! ! ! ------------------------------------------------------------------------------- !COUPLER ! ! ! !Permanent!Loss of the! 1 !23-11-33!Check: ! !-Failure to ! ! ! !Moni- !considered ! !CPLR !-HF CPLR ! !tune within ! ! ! !toring + !HF system ! !(4REx) ! ! !15s with RF ! ! ! !Moni- ! ! !(x=1or2)! ! !applied ! ! ! !toring ! ! ! ! ! ! ! ! ! !during ! ! ! ! ! ------------------------------------------------------------------------------- !ICAO ADRESS ! ! ! !Power up !Missing or ! 1 !23-11-00!Check: ! ! ! ! ! ! !invalid ! !ICAO !-ICAO ! ! ! ! ! ! !ICAO adress! !ADRESS/ !adress ! ! ! ! ! ! !input ! !HFx ! ! ! ! ! ! ! !detected ! !(3REx) ! ! ! ! ! ! ! !during ! !(x=1or2)! ! ! ! ! ! ! !power up ! ! ! ! ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- | | COCKPIT EFFECT | |CONSEQUENCE| MAINTENANCE | | EXTERNAL |----------------|DETECTION|ON THE |-------------------------| | FAILURES | LOCAL |ECAM|LVL| |SYSTEM |CLASS|MESSAGE |RECOMMEN- | | | | | | | | |LABEL356|DED ACTION| ------------------------------------------------------------------------------- ! FAULT ! ! ! !Permanent! HF XCVR ! 1 !23-81-13!Check: ! ! DETECTED ! ! ! !Moni- !remains ! !RMP1/2/3!-RMP Sys ! ! ON THE ! ! ! !toring !tuned on ! !(1RG1/2/!-Tuning ! !DGTL SERIAL ! ! ! ! !the last ! !3)/HFx !buses and ! !TUNING BUS ! ! ! ! !valid Freq ! ! (3REx) !associated! !-Label 037 ! ! ! ! ! ! ! !connectors! !missing for ! ! ! ! ! ! !(x=1or2)! ! !more than ! ! ! ! ! ! ! ! ! !10 s ! ! ! ! ! ! ! ! ! !-SSM of ! ! ! ! ! ! ! ! ! !label 037 ! ! ! ! ! ! ! ! ! !NCD ! ! ! ! ! ! ! ! ! !-Correct SDI! ! ! ! ! ! ! ! ! !never ! ! ! ! ! ! ! ! ! !received ! ! ! ! ! ! ! ! ! !-Incorrect ! ! ! ! ! ! ! ! ! ! parity ! ! ! ! ! ! ! ! ! !-Frequency ! ! ! ! ! ! ! ! ! !out of range! ! ! ! ! ! ! ! ! ------------------------------------------------------------------------------- !CFDIU FAULT ! ! ! !Permanent!No exchange! 3 !31-32-34!Check: ! !-Label 227 ! ! ! !Moni- !with CFDIU ! ! CFDIU !-CFDIU ! !missing for ! ! ! !toring !for HF ! !(1TW)/ !-Buses and! !more than ! ! ! ! !BITE Info ! ! /HFx !associated! !10s ! ! ! ! !No access ! ! (3REx) !connectors! ! ! ! ! ! !to the MENU! ! ! ! ! ! ! ! ! !MODE of the! !(x=1or2)! ! ! ! ! ! ! ! HF XCVR ! ! ! ! ------------------------------------------------------------------------------- !LGCIU FAULT ! ! ! !Permanent!Loss of ! 3 !32-31-71! ! ! ! ! ! !Moni- !LGCIU/HF ! ! ! ! ! ! ! ! !toring !connection ! ! ! ! ! ! ! ! !when ! ! !LGCIUx ! ! ! ! ! ! !inconsis ! ! !(5Gax)/ ! ! ! ! ! ! !tency bet! ! !HFx ! ! ! ! ! ! !ween air/! ! !(3REx) ! ! ! ! ! ! !ground ! ! !(x=1or2)! ! ! ! ! ! !infor ! ! ! ! ! ! ! ! ! !mation ! ! ! ! ! ------------------------------------------------------------------------------- !ATSU FAULT ! ! ! !Permanent!Loss of ! 3 !46-21-34! ! !- Label 270 ! ! ! !Moni- !ATSU/HF ! !ATSU1 ! ! !missing for ! ! ! !toring !connection ! !(1TX1)/ ! ! !more than ! ! ! ! ! ! !HFx ! ! !10s ! ! ! ! ! ! !(3REx) ! ! ! ! ! ! ! ! ! !(x=1or2)! ! -------------------------------------------------------------------------------
B. Functional Description
C. Interactive menu description
To utilize the BITE system it is necessary to get through one of the three MCDUs (2CA1, 2CA2 and 2CA3 (if installed)) (Ref. ATA 31-32).
The MCDUs are installed in the cockpit, on the center pedestal.
All the information displayed on the MCDUs during the BITE TEST configuration can be printed by the printer (Ref. ATA 31-35).
To utilize the BITE system, it is necessary to get through one of the two MDCUs (Multipurpose Control Display Unit) (3CA1 and 3CA2) (Ref.ATA 31-32).
The MCDUs are installed in the cockpit, on the center pedestal.
To utilize the BITE system it is necessary to get through one of the three MCDUs (2CA1, 2CA2 and 2CA3 (if installed)) (Ref. ATA 31-32).
The MCDUs are installed in the cockpit, on the center pedestal.
All the information displayed on the MCDUs during the BITE TEST configuration can be printed by the printer (Ref. ATA 31-35).
To utilize the BITE system, it is necessary to get through one of the two MDCUs (Multipurpose Control Display Unit) (3CA1 and 3CA2) (Ref.ATA 31-32).
The MCDUs are installed in the cockpit, on the center pedestal.