Cessna 400 Transponder (Type Rt-459A) And Optional Encoding Altimeter (Type Ea-401A) - Cessna 182Q 1979 Pilot Operating Handbook

PILOT'S OPERATING HANDBOOK
SUPPLEMENT
CESSNA 400 TRANSPONDER
AND ENCODING ALTIMETER
SUPPLEMENT
CESSNA 400 TRANSPONDER
(Type RT-459A)
AND
OPTIONAL ENCODING ALTIMETER
(Type EA-40 1A)
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 Cessna 400 Transponder system consists of a panel-mounted unit,
an externally-mounted antenna and an optional control wheel-mounted
XPDR IDE NT switch. 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 also to
Mode C (altitude reporting) interrogations on a selective reply basis on
any of 4096 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
reporting 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 and the optional
remote XPDR IDENT switch, are located on the front panel of the unit. The
altimeter setting knob is located on the encoding altimeter and the remote
XPDR IDE NT switch is located on the right hand grip of the pilot's control
wheel. Functions of the operating controls are described in Figure
1.
1 October 1978
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