CESSNA
MODEL 172S
SECTION 9 . SUPPLEMENTS
SUPPLEMENT
6 - FAA APPROVED
1. ANT/ADF
MODE
ANNUNCIATOR'
-.
Antenna
(ANT)
is
selected by the "out" position of the ADF button.
This mode
improves
the audio reception
and is usually
used for station
identification.
The bearing pointer is deactivated
and will park
in the 90° relative position. Automatic
Direction
Finder (ADF)
mode is selected by the depressed
position of the ADF button.
This mode activates
the bearing pointer. The bearing pointer.
will point in the direction
of the station relative to the aircraft
heading.
2. IN-USE FREQUENCY
DISPLAY -- The frequency to which the
ADF is tuned is displayed here. The active ADF frequency can
be changed
directly
when' either
of the timer
functions
is
selected.
3. BFO (Beat Frequency Oscillator)
ANNUNCIATOR
-- The BFO
mode, activated
and annunciated
when the "BFO" button is
'depressed,
permits
the carrier
wave ahd associated
morse.
code identifier broadcast"on the carrier wave to be heard.
NOTE
CW signals
(Morse Code) are unmodulated
and no audio
will be heard without 'use of BFO.
This type of signal is not
used in the United States air navigation.
It is used in some
foreign countries and marine beacons.
4. STANDBY
FREQUENCY/FLIGHT
TIME OR ELAPSED
TIME
ANNUNCIATION
-- When
FRQ is displayed
the STANDBY
frequency
is
displayed
in
the
right
hand
display.
The
STANDBY
frequency
is selected
using the frequency
select
knobs.
The selected
STANDBY
frequency
is put into the
ACTIVE frequency windows by pressing the frequency transfer
button.
Either the standby frequency,
the flight timer, or the
elapsed time is displayed
in this position. The flight timer and
elapsed timer are displayed
replacing
the standby
frequency
which goes into "blind" memory to be called back at any time
by depressing
the FRQ button. Flight time or elapsed time are
displayed
and
annunciated
alternatively
by .depressing
the
FLT/ET button.
Figure 1. KR 87 Automatic Direction Finder (ADF) (Sheet 2 of 4)
July 8/98
S6-5.
Summary of Contents for Cessna 172S Skyhawk SP
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