Cessna 152 - Page 207

PILOT'S
OPERATING HANDBOOK CESSNA 300 TRANSPONDER
SUPPLEMENT
AND
ALTITUDE ENCODER (BLIND)
(2)
Function
Switch
--
ON.
(3)
DIM
Control
--
ADJUST
light
brilliance
of
reply
lamp.
NOTE
During
normal
operation
with
function
switch
in
ON
posi-
tion,
reply
lamp
flashes
indicating
transponder
replies
to
interrogations.
(4)
ID
Button
--
DEPRESS
momentarily
when
instructed
by
ground
controller
to
"squawk
!DENT"
(reply
lamp
will
glow
steadily,
in-
dicating !DENT
operation).
TO TRANSMIT MODE
C
(ALTITUDE REPORTING) CODES IN FLIGHT:
(1)
Reply-Code
Selector
Knobs
--
SELECT
assigned
code.
(2)
Function
Switch
--
ALT.
NOTE
When
directed
by
grwnd
controller
to
"stop
altitude
squawk",
turn
Function
Switch
to
ON
for
Mode A
operation
only.
NOTE
Pressure
altitude
is
transmitted
by the
transponder
for
altitude
squawk
and
conversion
to
indicated
alti-
tude
is
done in ATC
computers.
Altitude
squawked
will
only
agree
with
indicated
altitude
when the
local
altimeter
setting
in
use
by the
ground
controller
is
set
in
the
aircraft
altimeter.
(3)
DIM
Control
--
ADJUST
light
brilliance
of
reply
lamp.
TO
SELF-TEST
TRANSPONDER OPERATION:
(1)
Function
Switch
--
SBY and
wait
30
seconds
for
equipment
to·
warm-up.
(2)
Function
Switch
--
ON
or
ALT.
(3)
TST Button
--
DEPRESS
(reply
lamp
should
light
brightly
regardless
of DIM
control
setting).
(4)
TST
Button
--
Release
for
normal
operation.
1
July
1978
5