BendixKing KXP 756 - Manual (Page 30)

29
ADF
KFS 586/586A
It is recommended that the KDF
806 unit be turned off when the
aircraft engine is started in order to
prevent possible voltage transient
damage to the radio. The unit is
turned off by placing the function
switch in the OFF position. The KFS
586A turns the unit off by rotating the
ON/OFF/VOL knob fully
counterclockwise. The volume control
adjusts the audio output for a
comfortable listening level.
Note: In the ADF mode, the audio
muting feature of the KDF 806 causes
the audio output to be muted unless
the receiver is locked onto a valid
station. This reduces interstation
noise and aids the pilot in identifying
navigable stations.
ADF
VOL
OFF
S
B
Y
X
BFO
ADF ANT
BFO
1799
388
ACTIVE WINDOW
STANDBY WINDOW
MODE SELECTOR
VOLUME CONTROL
NON-ACTIVE RECEIVE
ANNUNCIATOR
PHOTOCELL
TRANSFEER
BUTTON
FREQUENCY
CONTROL KNOBS
ı
KFS 586 Operation
The KDF 806 Automatic
Direction Finder has two operational
modes. With the mode switch in the
ADF position, the unit is placed into
the ADF mode and the loop antenna
is enabled. The indicator needle will
point to the relative bearing of the
selected station. To tell if there is a
sufficient signal for navigational
purposes, the pilot can place the KDF
806 back into the ANT mode, parking
the indicator needle at 90°. When the
unit is then switched to the ADF
mode, the needle should slew to the
station bearing in a positive manner,
without excessive sluggishness,
wavering, or reversals.
In the ANT mode, the loop
antenna is disabled and the unit acts
as a receiver, allowing audio reception
through the speaker or headphones.
The indicator needle remains parked
at the 90° relative position. This mode
provides slightly clearer audio
reception, and is used for station
identification. In various parts of the
world, some stations use an
interrupted carrier for identification
KFS 586 Control Functions