Cessna 172P - Page 323

PILOT'S
OPERATING
HANDBOOK
SUPPLEMENT
18
CESSNA
3OO
TRANSPONDER
AND
ENCODING
ALTIMETER,
SUPPLEMENT
CESSNA
3OO
TRANSPONDER
lType
RT-3594)
AND
OPTIONAL
ENCODING
ALTIMETER
(Type
EA-4O14)
sEcTloN
1
GENERAL
The
Cessna
300
Transponder
(Type
RT-3õ94),
shown inFigure
f is the
airborne componont
of an
A'ir Traffic Control
Radar
Beacon System
(ATCRBS).
The transponder
enables
the ATC
ground
controller
to
"see"
and identify the aircraft,
while in
flight, on the sontrol
center's rada,rscope
more readily.
The Cessna
300 Transponder syatem consists
of a
panel-mounted
unit
and an externally-mounted
antenña. The
transponder receivos
interrogat-
ing
pulse
signals on
1030
MHz
a,nd transmits
coded
pulse-train
reply
signals on
1090 MHz. It
is
capable
of replying
to Mode A
(aircraft
identification) and
Mode
C
(altitude
reporting)
interrogations on & selec-
tive roply
basis
on any of
4096 information code selections. lttthen
an
optional
panel-mounted
EA-4014 Encoding
Altimeter
(not
part
of a
standard 300 Transpondor system)
is included in the avionic configura-
tion, altitude
reporting information is available
in
100
foot
iucrements.
All
Cessna 800
Transponder operating controls, with the exception
of
the optional
altitude
encoder's altimeter eetting knob, are located
on
the
front
panel
of
the unit. The altimeter setting knob
is located on
the
encoding
altimeter.
Functions
of
the operating controls are described
in
Figure
1.
30 May
1980
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