Cessna Cardinal RG 1974, Руководство пользователя

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Cessna Aircraft Company
Model 177RG Supplement No.
DP-014-14
Section 9
Supplements Page 7
Revision 0
SECTION 7
SYSTEMS DESCRIPTION
OPERATING MODES
The KR 87 Automatic Direction Finder has two operational
modes. In the ANT (Antenna) mode (ADF button out) the loop
antenna is disabled, and the unit simply acts as a receiver,
allowing audio reception through the speaker or headphones.
The indicator needle will remain parked at the 90
o
relative
position and the ANT message on the left side of the display
will be lighted. This mode provides slightly clearer audio
reception, and is used for station identification. In various parts
of the world, some L/MF stations use an interrupted carrier for
identification purposes. A Beat Frequency Oscillator (BFO)
function is provided to permit these stations to be more easily
identified. Pushing the BFO switch will cause a 1000Hz tone to
be heard whenever there is a radio carrier signal present at
the selected frequency. It will also light the BFO message in
the center of the display. With the ADF button depressed, the
unit is placed into the ADF mode and the loop antenna is
enabled. The ADF message on the left side of the display will
be lighted and the indicator needle will point to the relative
bearing of the selected station. In order to tell if there is a
sufficient signal for navigational purposes, the pilot can place
the KR 87 back in the ANT mode, parking the indicator needle
at 90
o
. When the unit is then switched to the ADF mode, the
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