Textron Cessna 172R - Page 386

SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
6
-
FAA
APPROVED
CESSNA
MODEL
172R
5-
FLIGHT
TIMER
AND
ELAPSED
TIMER
MODE
ANNUNCIATION
-
Either
the
elapsed
time
(ET)
or
flight
time
(FLT)
mode
is
annunciated
here.
6.
FREQUENCY
SELECT
KNOBS
-
Selects
the
standby
frequency
when
FRQ
is
displayed
and
directly
selects the active
frequency
whenever
either
of
the time
functions
is
selected.
The
frequency
selector
knobs
may
be
rotated
either clockwise
or
counterclockwise.
The
small
knob
is
pulled
out
to
tune
the
1’s.
The
small
knob is
pushed
in
to tune
the
10’s.
The
outer
knob
tunes
the
100’s
with
rollover into
the
1000’s
up
to
1799.
These
knobs
are
also used
to
set
the desired
time
when the
elapsed
timer
is
used
in
the
countdown
mode.
7.
ON/OFF/VOLUME CONTROL
SWITCH
(ON/OFF/VOL)
-
Controls
primary
power
and audio
output
level.
Clockwise
rotation
from OFF
position
applies
primary
power
to
the
receiver;
further
clockwise
rotation increases
audio
level. Audio
muting
causes
the audio
output
to
be muted
unless the
receiver
is
locked
on
a
valid station.
8.
SET/RESET
ELAPSED
TIMER
BUTTON
(SET/RST)
-
The
set/reset
button
when
pressed
resets
the
elapsed
timer whether
it
is
being
displayed
or
not.
9.
FLIGHT
TIMER/ELAPSED
TIMER
MODE
SELECTOR
BUTTON
(FLT/ET)
-
The
Right
Timer/Elapsed
Time
mode selector button when
pressed
alternatively
selects
either
Right
Timer mode
or
Elapsed
Timer
mode.
10.
FREQUENCY
TRANSFER
BUTTON
(FRQ)
-
The
FRQ
transfer
button
when
pressed
exchanges
the
active
and
standby
frequencies.
The
new
frequency
becomes
active and the
former
active
frequency
goes
into
standby.
11.
BFO
(Beat
Frequency
Oscillator)
BUTTON
-
The
BFO
button
selects
the
BFO
mode
when
in
the
depressed position.
(See
note
under item
3).
12.
ADF
BUTTON
-
The
ADF
button
selects
either the
ANT
mode
or
the
ADF
mode.
The
ANT
mode
is
selected
with
the
ADF
button
in
the
out
position.
The
ADF
mode is
selected with the
ADF
button
in
the
depressed
position.
Figure
1
.
KR
87
Automatic Direction
Finder
(ADF)
(Sheet
3
of
4
S6-6
Dec
2/96
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