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The ADF control panel is on the P8 aft electronics panel.
Interface Components
These flight compartment components have an interface with
the ADF system.
* Left and right EFIS control panels
* Left inboard and outboard display units
* Right inboard and outboard display units
* Capt and F/O audio control panels.
ADF SYSTEM - FLIGHT COMPARTMENT COMPONENT LOCATION
EFFECTIVITY
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ADF SYSTEM - FLIGHT COMPARTMENT COMPONENT LOCATION
ADF SYSTEM - FLIGHT COMPARTMENT COMPONENT LOCATION
EFFECTIVITY
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Electronic Equipment Compartment
ADF receiver 1 and ADF receiver 2 are in the electronic
equipment compartment on the E3-1 shelf.
ADF Antenna
The ADF antennas are on the top of the fuselage. ADF antenna 1
is at fuselage station 694, and ADF antenna 2 is at fuselage
station 727.
ADF SYSTEM - ELECTRONIC EQUIPMENT COMPARTMENT AND ANTENNA COMPONENT LOCATIONS
EFFECTIVITY
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ADF SYSTEM - ELECTRONIC EQUIPMENT COMPARTMENT AND ANTENNA COMPONENT LOCATIONS
ADF SYSTEM - ELECTRONIC EQUIPMENT COMPARTMENT AND ANTENNA COMPONENT LOCATIONS
EFFECTIVITY
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Power
115v ac power from the ADF circuit breakers go to the ADF
control panel. The ADF control panel uses the 115v ac power for
operation. The ADF control panel sends 115v ac power to the
ADF receivers for operation. The ADF receivers send 12v dc
power to the ADF antennas for operation.
PSEU
The proximty switch electronics unit (PSEU) supplies an air/
ground discrete input to the ADF receiver. The ADF receiver
uses the air/ground input to calculate the flight leg count for the
internal memory.
ADF Antenna
The ADF antenna assembly contains the loop antennas and the
sense antenna. The antenna assembly also contains signal
amplifiers for the loop and the sense antenna. The loop
antennas supply direction data and the sense antenna supplies
station audio.
REU
The ADF receiver sends station audio to the remote electronics
unit (REU). The REU sends the station audio to the flight
compartment headsets and speakers.
ADF SYSTEM - POWER AND ANALOG INTERFACE
EFFECTIVITY
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ADF SYSTEM - POWER AND ANALOG INTERFACE
ADF SYSTEM - POWER AND ANALOG INTERFACE
EFFECTIVITY
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General
The ADF receivers have an interface with the display
electronics units (DEUs) and the radio magnetic indicator
(RMI). The interface is on ARINC 429 data buses.
ADF Control Panel
The ADF control panel sends tune frequency inputs to the ADF
receiver. The ADF control panel sends a data word that
contains the ADF mode or ANT mode selection. The ADF control
panel sets a bit that enables ADF receiver beat frequency
oscillator (BFO) operation when you turn on the tone selector.
Digital Output
The ADF receiver sends this data on two output data buses:
* ADF station bearing
* Test signals
* Receiver condition.
Output data bus 1 from the ADF receiver goes to the radio
magnetic indicator (RMI). The RMI uses the station bearing data
to control the RMI bearing pointers.
Output data bus 2 goes to the DEUs for display.
ADF SYSTEM - DIGITAL INTERFACE
EFFECTIVITY
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ADF SYSTEM - DIGITAL INTERFACE
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