Cessna 172P Pilot's Operating Handbook And Flight Manual page 351

22
PILOT'S
OPER,ATING
HANDBOOK
CESSNA
4OO
TR,ANSPONDE¡N,
SUPPLEMENT
AND ALTITUDE
ENCODER
(BLIND)
2.
Function Switch --
ON.
3.
DIM Control -- ADJUST
light
brilfianco of reply lamp.
NOTE
During normal operation
with
function switch
in
ON
position, reply lamp flashes indicating transponder
rep-
ì.ies
to interrogations.
ID Button --
DEPRESS
momentarily
when instructed by ground
controller to "squawk
IDENT"
(reply lamp
will
glow steadily,
indicating
IDENT operation).
TO
TRANSMITMODE
C
(ALTITUDE
REPORTING) CODESINFLIGHT:
1.
Reply-Code Solector
Switches --
SELECT
assigned
oode.
2.
Function Switch -- ALT.
NOTE
When directed
by ground controller to
"stop
altitude
squawk", turn Function SwÍtcb to
ON
for
Mode
A
opera-
tion only.
NOTE
Pressure altitude
is transmitted by the transponder for
altitude squawk
and
conversion to indicated altitude is
done
in
ATC computers.
Altitude
squawked
wiII
only
agree
with
indicated
altitude
when the looal altÍmeter
setting in
use
by
the
ground controller is
set
in
the
airoraft
altimeter.
3.
DIM Controt -- ADJUST
light
brilliance of reply lamp.
TO SELF-TEST TRANSPONDER
OPER,ATION:
1.
Funation Switch
-- SBY and wait
30
seconds
for equipment to
rvarm-uP.
2.
Function Switch --
ON.
3.
TEST Button
--
DEPRE¡SS
(reply lamp
should
light
brightly
regardless of DIM
control setting).
4,
TEST Button -- RELEASE
for
normal operation.
4
30
May
1980