Section 917
BENDIX/KING KT 73 Transponder
Page Date: 31. March 2009
917 - 3
Pilot´s Operating Handbook
EXTRA 300L
917.1
GENERAL
The BENDIX/KING KT 73 panel mounted Mode S Transponder is a radio transmitter and receiver
that fulfills the role of the airborne beacon equipment according to the requirements of the Air Traffic
Radar Beacon System (ATCRBS). Its functionality includes replying to ATCRBS Mode A and C
and Mode S interrogations. The Mode S function will allow the ground station to individually select
the aircraft by its Aircraft Address assigned to the aircraft by the aviation agency.
It operates on radar frequencies, receiving ground radar interrogations at 1030 MHz and transmitting
a coded response of pulses to ground-based radar on a frequency of 1090 MHz.
The KT 73 is equipped with IDT (ident) capability that activates the Special Position Identification
(SPI) pulse for 18 seconds.
In addition to displaying the code, reply symbol and mode of operation, the KT 73 screen will display
pressure altitude. The displayed pressure altitude may not agree with the aircraft’s baro-corrected
altitude under non standard conditions.
The Traffic Information Service (TIS) and Automatic Dependent Surveillance-Broadcast (ADS-B) is
not available in this installation.
N O T E
The KT 73 owner accepts all responsibility for obtaining the proper license before
using the transponder.
The coverage you can expect from the KT 73 is limited to „line of sight“. Low altitude or aircraft
antenna shielding by the aircraft itself may result in reduced range. Range can be improved by
climbing to a higher altitude. It may be possible to minimize antenna shielding by locating the
antenna where dead spots are only noticed during abnormal flight attitudes.
N O T I C E
Damage possible due to current peaks.
The KT 73 should be turned off before starting or shutting down aircraft engine.
The KT 73 Transponder is powered on by rotating the Function Selector Knob from the
OFF
position
to any functional mode position.
Page Date: 20. January 2016
Summary of Contents for 300L
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