Page Date: 19. February 2014 911 - 3
Section 911
BECKER ATC 4401 Transponder
PilotĀ“s Operating Handbook US
EXTRA 330LX
911.1 GENERAL
The Becker panel mounted ATC 4401 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 Mode C
interrogations.
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
ATC 4401 is equipped with IDENT capability that activates the Special Position Identification (SPI)
pulse.
N O T E
The ATC 4401 owner accepts all responsibility for obtaining the proper license before
using the transponder. Refer to Becker Pilot's Guide.
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