Cessna 152 - Page 211

PILor's
OPERATING HANDBOOK
SUPPLEMENT
CESSNA 300 TRANSPONDER
AND
ENCODING ALTIMETER
3. !DENT (ID) SWITCH - When
depressed,
selects
special
pulse
identifier
to
be
transmitted
with
transponder
reply
to
effect
immediate
identification
of
aircraft
on
ground
con-
troller's
display.
(Reply
Lamp
will
glow
steadily
during
duration
of !DENT
pulse
transmission.
)
4.
DIMMER
(DIM)
CONTROL - Allows
pilot
to
control
brilliance
of
reply
lamp.
5,
SELF-TEST
(TST) SWITCH
--
When
depressed,
causes
trans-
ponder
to
generate
a
self-interrogating
signal
to
provide
a
check
of
transponder
operation.
(Reply
Lamp
will
glow
steadily
to
verify
self
test
operation.)
6. REPLY-CODE SELECTOR KNOBS
(4)
-
Select
assigned
Mode A
reply
code.
7. REPLY-CODE INDICATORS
(4)
-
Display
selected
Mode A
reply
code.
8.
1000-FOOT
DRUM
TYPE
INDICATOR -
Provides
digital
alti-
tude
readout
in
1000-foot
increments
between
-1000
feet
and
+35, 000
feet.
When
altitµde
is
below 10, 000
feet,
a diagonally
striped
flag
appears
in
the
10,000
foot window.
9.
OFF
INDICATOR WARNING FLAG -
Flag
appears
across
alti-
tude
readout
when
power
is
removed
from
the
altimeter
to
indi-
cate
that
readout
is
not
reliable.
10.
100-FOOT
DRUM
TYPE
INDICATOR -
Provides
digital
alti-
tude
readout
in
100-foot
increments
between
O
feet
and 1000
feet.
11.
20-FOOT
INDICATOR NEEDLE -
Indicates
altitude
in
20-foot
increments
between
O
feet
and 1000
feet.
12. ALTIMETER SETTING SCALE - DRUM
TYPE
-
Indicates
se-
lected
altimeter
setting
in
the
range
of 27. 9
to
31. 0
inches
of
mercury
on
the
standard
altimeter
or
950
to
1050
millibars
on
the
optional
altimeter.
13. ALTIMETER SETTING
KNOB
-
Dials
in
desired
altimeter
setting
in
the
range
of 27. 9
to
31. 0
inches
of
mercury
on
the
standard
altimeter
or
950
to
1050
millibars
on
the
optional
altimeter.
Figure
1.
Cessna
300
Transponder
and
Encoding
Altimeter
(Sheet 2 of
2)
1
July
1978
3