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of dashes show when the receiver is not receiving a valid signal.
AIRCRAFT
Communications DA 40 Series
AMM
Page 4
20 Sep 2007 23-10-00 Doc # 6.02.01
Rev. 5
) AUTO-TO. Press and hold the Nav Mode button for more than two seconds to set the receiver
to Auto-To mode. In auto-To mode, the CDI displays with the deviation bar in the center position
and the OBS showing a direct course to the selected station. The “TO” annunciator will show.
When the receiver stabilizes the CDI will go back to normal operation and show any course
deviation.
) Localizer (LOC) Mode. When a localizer frequency is the set as the active frequency and a valid
navigation signal is being received the KX 125 shows localizer information. The CDI displays
and LOC shows in the bottom half of the center display. The “FLAG” indicator shows in the
bottom right of the display when no valid signals are being received in LOC mode.
The KX 125 has these controls:
) OFF/PULL TEST switch. Turn the switch fully counter-clockwise to set the receiver to OFF. Turn
the switch clockwise to set the receiver on and to set the volume to the desired level. The KX
125 has automatic squelch. Pull the switch out to cancel the squelch and test the volume level.
Push the knob in to set the automatic squelch.
) COM Frequency selector. The COM frequency selector has an inner knob and an outer knob.
Turn the outer knob clockwise to increase the frequency in 1 MHZ increments. Turn the outer
knob counter-clockwise to decrease the frequency in 1 MHZ increments. Turn the inner knob
clockwise to increase the frequency in 50 kHz increments. Turn the inner knob counterclockwise
to decrease the frequency in 50 kHz increments. Pull the inner knob out to set 25 kHz
increments.
) MODE Button. Momentarily press the mode selector button to change the NAV mode when a
valid VOR frequency is set as the active frequency. The mode will rotate through CDI-BRG-RAD
in order. Changing the active or standby frequency will not change the mode unless a localizer
frequency is set as the active frequency.
Press and hold the MODE button for at least two seconds when a valid VOR frequency is
selected as the active frequency to set the NAV receiver to Auto-To mode. You can enter Auto-
TO mode directly from any mode.
) PULL IDENT switch. Pull the switch out to activate the NAV identification (Ident). Turn the switch
clockwise to increase voice and ident tone. Turn the switch counter-clockwise to decrease the
volume. Push the switch in to mute the ident and voice tones.
AIRCRAFT
DA 40 Series
AMM
Communications
Doc # 6.02.01
Rev. 5 23-10-00 Page 5
20 Sep 2007
) NAV Frequency selector. The NAV frequency selector has an inner knob and an outer knob.
Turn the outer knob clockwise to increase the frequency in 1 MHZ increments. Turn the outer
knob counter-clockwise to decrease the frequency in 1 MHZ increments. Turn the inner knob
clockwise to increase the frequency in 50 kHz increments. Turn the inner knob counterclockwise
to decrease the frequency in 50 kHz increments. Pull the inner knob out and rotate
the switch to set the OBS bearing. Turn the switch clockwise to increase the bearing and turn
the switch counter -clockwise to decrease the bearing.
) COM frequency transfer button. Momentarily pressing the COM frequency transfer button will
move the standby frequency to the active frequency and the active frequency to standby. Press
and hold the button for at least two seconds to set active entry mode. When the active entry
mode is set, the active frequency is entered directly by using the COM frequency selector. The
standby frequency is not displayed when active entry mode is set. Momentarily press the
transfer button again to de-select active entry mode.
) NAV frequency transfer button. Momentarily pressing the NAV frequency transfer button will
move the standby frequency to the active frequency and the active frequency to standby. Press
and hold the button for at least two seconds to set active entry mode. When the active entry
mode is set, the active frequency is entered directly by using the NAV frequency selector. The
standby frequency is not displayed when active entry mode is set. Momentarily press the
transfer button again to de-select active entry mode.
The KX 125 has an LCD display. You can adjust the contrast of the display with the adjustment
screw located in the lower-right side of the front panel. Turn the adjustment screw to set the
contrast to the correct level.
AIRCRAFT
Communications DA 40 Series
AMM
Page 6
20 Sep 2007 23-10-00 Doc # 6.02.01
Rev. 5
Standby Nav
Frequency
BENDIX/KING KX 155A TSO
　
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