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PORT A
PORT B
DATA
OUTPUT
PORT C
ADF 1
RECEIVER
ADF 2
RECEIVER
ANTENNA ANTENNA
DC
ESS
ADF
2
CBP2--H7
ADF
1
CBP4--D4
DC
BUS 2
HF
PTT
<0011>
<0015> <0015>
<0060>
AUDIO CONTROL PANELS
IAPS
<0011> <0008> <0014>
<0008> <0014> <0060>
<0060>
<0008> <0011> <0014>
<0024><0050>
Vol. 1 18--40--3
REV 56, Jan 31/03
NAVIGATION SYSTEMS
Automatic Direction Finder
Flight Crew Operating Manual
CSP A--013
MASTER
Automatic Direction Finder ADF Key <MST>
Figure 18---40---2
ADF Frequency
Readout (green)
ADF Key
Push key once to directly
tune active frequency
with tuning knobs.
Push key twice to select
ADF main page.
Radio Tuning Unit -- Top Level Page
Center Pedestal
Radio Tuning Unit -- ADF Main Page
Center Pedestal
ADF Tone Key
Used to select tone circuit on or off.
When selected on, an aural signal is
superimposed on the unmodulated carrier
wave to aid in precise frequency selection.
Selected setting is displayed in cyan.
ADF Frequency
Readout (green)
Tuning Knob
Tuning Window
<0012> <0012>
<0024><0050>
REV 56, Jan 31/03
Vol. 1 18--40--4
NAVIGATION SYSTEMS
Automatic Direction Finder
Flight Crew Operating Manual MASTER
CSP A--013
Automatic Direction Finder <MST>
Figure 18---40---3
<0008> <0011> <0014>
<0011> <0008> <0014>
1 -- VHF -- 2 INT/SVC
PA
HF 1 -- VHF -- 2 INT/SVC
PA
VHF 3
PA
<0060>
PA
1 -- ADF -- 2
Press to monitor selected
ADF receiver. When lit,
rotate to increase volume.
Press again to deselect
ADF receiver audio.
Audio Control Panel
Center Pedestal
Display Control Panel
Pilot’s and Copilot’s Side Panels
BRG
Used to select next
waypoint that
bearing pointer will
indicate direction to.
<0040>
PA
<0008> < 0014> <0060>
Vol. 1 18--40--5
REV 56, Jan 31/03
NAVIGATION SYSTEMS
Automatic Direction Finder
Flight Crew Operating Manual
CSP A--013
MASTER
Automatic Direction Finder --- Bearing Source <MST>
Figure 18---40---4
Bearing Pointers
Indicates direction of
selected bearing.
Single lined (bearing No. 1)
is magenta. Double lined
(bearing No. 2) is cyan.
Bearing Source
Indicates navigation source
selected to obtain bearings.
Single lined (bearing No. 1)
is magenta. Double lined
(bearing No. 2) is cyan.
Primary Flight Display
Pilot’s and Copilot’s Instrument Panels
Multifunction Display -- HSI Mode
Pilot’s and Copilot’s Instrument Panels
<0015>
REV 56, Jan 31/03
Vol. 1 18--40--6
NAVIGATION SYSTEMS
Automatic Direction Finder
Flight Crew Operating Manual MASTER
CSP A--013
A. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
Automatic
Direction
Receiver
ADF 1 DC ESS 4 D4
Finder
ADF 2 DC BUS 2 2 H7
Vol. 1 18--50--1
REV 56, Jan 31/03
NAVIGATION SYSTEMS
Distance Measuring Equipment
Flight Crew Operating Manual
CSP A--013
MASTER
1. DISTANCE MEASURING EQUIPMENT
There are two identical distance measuring equipment (DME) systems installed in the
aircraft. The DME system computes and displays the straight line distance between the
aircraft and a selected DME ground station. The DME system also provides ground speed,
time to station and station identification.
There are two DME transceivers installed in the avionics compartment that operate in the
frequency range of 962 to 1213 MHz with a range of 300 nautical miles at 30,000 feet. Each
transceiver has three channels and can track up to three stations simultaneously. Channel 1
of each DME is paired with the onside VOR and can be manually tuned by either the radio
tuning units, or backup tuning unit.
The DME transceiver is also tuned automatically by the FMS through the RTU. If Autotune
is selected on the control display unit, the FMS will automatically tune VOR/DME channel 1.
<0024><0050>
The DME transceivers interrogate the ground station at regular intervals. The ground station
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