Cessna 152 - Page 233

PILOT'S
OPERATING HANDBOOK
SUPPLEMENT
CESSNA 400 TRANSPONDER
AND
ENCODING ALTIMETER
(2)
Function
Switch
--
ON.
(3)
DIM
Control
--
ADJUST
light
brilliance
of
reply
lamp.
NOfE
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,
indi-
cating
IDENT
operation).
TO TRANSMIT MODE C (ALTITUDE REPORTING) CODES
IN
FLIGHT:
(1)
Off
Indicator
Warning
Flag
--
VERIFY
that
flag
is
out
of view on
encoding
altimeter.
(2)
Altitude
Encoder
Altimeter
Setting Knob - SET IN
assigned
local
altimeter
setting.
{3)
Reply-Code
Selector
Switches
--
SELECT
assigned
code.
(4)
Function
Switch
--
ALT.
NOfE
When
directed
by
ground
controller
to
"stop
aititude
squawk",
turn
Function
Switch to ON
for
Mode A
operation
only.
NOTE
Pressure
altitude
is
transmitted
by the
transp:lnder
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
encoding
altimeter.
(5)
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.
1
July
1978
5