Cessna TURBO CENTURION T210M 1978 Pilot Operating Handbook page 299

PILOT'S OPERATING HANDBOOK
SUPPLEMENT
CESSNA 400 TRANSPONDER
AND ENCODING ALTIMETER
(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 IDENT" (REPLY lamp will glow steadily, indi-
cating !DENT 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
loc a l altimeter setting.
(3)
Reply-Code Selector Switches -- SELECT assigned code.
(4) Function Switch --
ALT.
NOTE
When directed by ground controller to "stop altitude
squawk", turn Function Switch to ON for Mode A
operation only.
NOTE
Pressure a ltitude is transmitted by the transp,mder
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
se t 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.
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