Transponder Description; Equipment Approvals - Becker VPL-PX11 Bedienungsanleitung

4.

Transponder description

The Mode S transponder and the control unit are the airborne components of the Air
Traffic Control (ATC). It functions in accordance with the secondary radar principle and
allows air traffic control to locate, identify and track aircraft.
The Mode S transponder provides the following features:
• In the selective mode (Mode S), the Ground Control can interrogate the transponder
individually using the ICAO-24-bit address, which is unique to the particular aircraft.
• Support of the SI code (Surveillance Identifier)
• Register capability for elementary surveillance (ELS) and enhanced surveillance
(EHS)
• Extended squitters transmission
• Data link capability
Inherent features:
• Mode A - in this mode, the 4096 character code set on the control head is sent as a
reply to interrogation from a ground station.
• Mode C - in this mode, the encoded altitude is sent in addition to the possibilities of
mode A. The corresponding flight level to the altitude is indicated on the display,
delivered by encoding altimeter or blind encoder to the unit.
• A special identifier pulse (SPI) can be activated by pressing the IDT button in Mode
A/C and Mode S.
• Selftests (BITs). The Initiated Built-In Test (IBIT), the Continuous Built-In Test
(CBIT) and the Power-on Built-In Test (PBIT) are integrated in the transponder.

4.1 Equipment approvals

EASA.21O.717
Bedienung/Operation BXP6403-X-(XX)
ETSO-2C112b
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