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Test
When you push the test switch, the NAV control panel sends a
test command out on it’s output bus. If a VOR frequency shows
in the active frequency window, the test command goes to the
VOR receiver. IF an ILS frequency shows in the active frequency
window, the control panel sends a test command to the ILS
receivers. If there is a DME frequency that is paired with the
VOR or ILS frequency, a test command also goes to the DME
interrogators.
When you do a test of the master dim and test system, the NAV
control panel shows 188.88. The display shows for two seconds
on then one second off until the test is complete.
DME SYSTEM - NAVIGATION CONTROL PANEL
EFFECTIVITY
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DME SYSTEM - NAVIGATION CONTROL PANEL
DME SYSTEM - NAVIGATION CONTROL PANEL
EFFECTIVITY
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General
The audio control panels (ACP) permit the crew to hear the DME
station identification signals. The identification signals are 1350
Hz.
The EFIS control Panel mode selector switch selects the NAV
display modes that show DME distance.
Audio Controls
Set these controls on the audio control panel to listen to DME
audio:
* Push ON the NAV receiver volume control (NAV 1 for DME 1
and NAV 2 for DME 2)
* Select B (both) or R (range) on the voice range filter switch
* Set the NAV receiver volume control.
The voice/range selector permits you to hear DME audio. You
will hear the DME audio when the voice/range selector is in the
R or B position.
EFIS Controls
The EFIS control panel mode selector switch must be in the
VOR/ILS position to show DME distance on the top right of the
ND.
You put the VOR/ADF 1 switch to VOR 1 to show DME 1 in the
lower left corner of the ND. DME 2 shows in the lower right
corner of the ND when the VOR/ADF 2 switch is put to VOR 2.
DME SYSTEM - OPERATION - CONTROLS
EFFECTIVITY
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DME SYSTEM - OPERATION - CONTROLS
DME SYSTEM - OPERATION - CONTROLS
EFFECTIVITY
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Normal PFD Display
The left PFD shows DME 1 data. The right PFD shows the DME 2
data. The DME distance display shows in white letters and
numbers.
Normal ND Display
DME distance shows on the top right corner of these ND
displays:
* Expanded and centered VOR
* Expanded and centered ILS.
The DME also shows in the lower left (VOR 1) and the lower
right (VOR 2) corner of the ND if you select VOR on the EFIS
control panel.
DME NCD or Failed Displays
White dashes replace numbers when the DME distance is no
computed data (NCD). If the DME has a failure, an amber DME
flag replaces the DME distance. The NCD and fail flag show in
amber.
DME SYSTEM - DISPLAY
EFFECTIVITY
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DME SYSTEM - DISPLAY
DME SYSTEM - DISPLAY
EFFECTIVITY
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DME SYSTEM - DISPLAY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Normal Tune Input
The navigation control panel is the normal source for tune
inputs. The flight management computer (FMC) sends up to four
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