19
CESSNA 400 TRANSPONDER
PILOT'S OPERATING HANDBOOK
AND ALTITUDE ENCODER (BLIND)
SUPPLEMENT
SECTION 5
PERFORMANCE
There is no change to the airplane performance when this avionic
equipment is installed. However, the installation of an externally mounted
antenna or several related external antennas, will result in a minor
reduction in cruise performance.
6
1 July 1979
20
PILOT
'
S OPERATING HANDBOOK
CESSNA 400 TRANSPONDER
SUPPLEMENT
AND ENCODING ALTIMETER
SUPPLEMENT
CESSNA 400 TRANSPONDER
(Type RT-459A)
AND
OPTIONAL ENCODING ALTIMETER
(Type EA-401 A)
SECTION 1
GENERAL
The Cessna 400 Transponder (Type RT-459A), shown in Figure 1, is the
airborne component of an Air Traffic Control Radar Beacon System
(ATCRBS). The transponder enables the ATC ground controller to "see
"
and identify the aircraft, while in flight, on the control center's radarscope
more readily.
The 400 Transponder consists of a panel-mounted unit and an exter-
nally mounted antenna. The transponder receives interrogating pulse
signals on 1030 MHz and 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 a selective reply basis on any of
4,096 information code selections. When an optional panel mounted EA-
401A Encoding Altimeter (not part of 400 Transponder System) is included
in the avionic configuration, the transponder can provide altitude report-
ing in 100-foot increments between -1000 and +35,000 feet.
All Cessna 400 Transponder operating controls, with the exception of
the optional altitude encoder's altimeter setting 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.
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