Textron Cessna 172S Skyhawk SP, Information Manual

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SECTION 9 - SUPPLEMENTS
SUPPLEMENT 16
GENERAL
(Continued)
CESSNA
MODEL 172S
TST - Self-test function. The transmitter is disabled. All
display segments will come on for a minimum of 4
seconds. If no faults have been detected "TEST
OK" will be displayed. Refer to the KT 73
Transponder section of the Bendix/King Silver
Crown Plus Pilot's Guide.
GND - Sets the transponder to inhibit ATCRBS,
ATCRBS/Mode S All Call and Mode S-only replies.
The KT 73 Transponder will continue to generate
Mode S squitter transmissions and "reply.to selective
interrogations.
The KT 73 Transponder should be
set to the GND position when the airplane is in
operation on the ground before or after flight.
ON - Sets transponder to transmit Mode
NS
(airplane
identification) reply pulses with altitude' information
suppressed.
Transponder identification code is
annunciated on the right side of the display.
ALT - Sets transponder to transmit Mode A (squawk).
Mode C (altitude squawk) and Mode S (airplane
identification)
reply pulses after receiving the
interrogation signal. FL is shown on the left side of
the display with the pressure altitude in hundreds of
feet.
The airplane identification code is shown on
the right side of the display.
6. VFR CODE BUnON (VFR) - Pushing the "VFR" Button will
replace the current M0ge. A reply code with a pre-
programmed Mode A reply code (usually 1200).
7. CODE SELECTOR KNOBS - Selects assigned Mode A
(squawk) code. Each knob sets a digit of the 4-character
code. The new code will be transrnitted after a 5 second
delay.
Refer to the KT 73 Transponder section of the Bendix/King Silver
Crown Plus Pilot's Guide for additional information.
S16-8 U.S.
FAA APPROVED
Original