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The radio magnetic indicator (RMI) shows bearing to a VOR or
ADF station relative to the airplane magnetic heading.
The RMI has two bearing pointers. The bearing pointers can
show ADF or VOR data. You use the selectors on the front of the
RMI to select between VOR or ADF as the source of data. The
RMI has two amber flags, one for each bearing pointer. The
flags come into view if the selected data source inputs fail.
ADF SYSTEM - RADIO MAGNETIC INDICATOR DISPLAYS
EFFECTIVITY
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ADF SYSTEM - RADIO MAGNETIC INDICATOR DISPLAYS
ADF SYSTEM - RADIO MAGNETIC INDICATOR DISPLAYS
EFFECTIVITY
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General
The ADF data shows on the captain and first officer NAV
displays in the VOR, APP, and MAP modes. The bearing
pointers around the compass rose show VOR or ADF bearing
data. To show ADF bearing, set the EFIS control panel VOR/ADF
switches to ADF and set the EFIS mode selector to the VOR,
APP, or MAP display modes. The bearing pointers are cyan
when they show ADF data. The ADF source data and frequency
or identifier shows in cyan at the bottom corners of the displays.
The bearing pointers show in the expanded and centered
displays. The bearing pointers show on the expanded displays
if the ADF bearing is in the compass rose display limit. This
graphic shows the displays in the centered NAV display mode.
Bearing Pointers
When you set the VOR/ADF switches to the ADF position,
bearing pointers 1 and 2 show in cyan around the edge of the
compass rose. There is a pointer head and tail for both bearing
pointers. The DEUs remove the bearing pointers when the
receiver data goes to an NCD condition, or when you set the
VOR/ADF switches to the off position.
Invalid Display
The amber ADF fail flags show in the lower corners of the
display when there is a failure of the ADF receivers. The ADF
flags show in the same location for the expanded display.
ADF SYSTEM - EFIS NAV DISPLAYS
EFFECTIVITY
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ADF SYSTEM - EFIS NAV DISPLAYS
ADF SYSTEM - EFIS NAV DISPLAYS
EFFECTIVITY
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Test
Push the test switch on the front of the ADF receiver to start the
test. The test results show on the LED status indicators on the
front of the receiver.
When you push the test switch, the receiver does a check of the
internal receiver operation and the interface with the ADF
control panel. The self test lasts 30 seconds. This is the test
sequence that shows on the LED status indicators:
* 0 to 2 seconds - the LRU status and control fail LEDS come
on red
* 2 to 4 seconds - the LRU status LED changes to green and
the control fail LED remains red
* 4 to 12 seconds - the LRU status and control fail LEDs go off
* 12 to 42 seconds - the test results show on the LED status
indicators.
For test results, the LRU status LED comes on green if there are
no LRU faults or red if any faults occur. The control fail LED
stays off if the ADF control panel input signal is valid or comes
on red if there is no input from the ADF control panel or if the
input signal is invalid.
ADF SYSTEM - FRONT PANEL BITE
EFFECTIVITY
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ADF SYSTEM - FRONT PANEL BITE
ADF SYSTEM - FRONT PANEL BITE
EFFECTIVITY
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Test
To see the ADF test sequence, select VOR or APP on the EFIS
control panel mode selector.
To start the test, push the test switch on the ADF control panel
mode selector knob.
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