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Figure 2
TRANSPONDER
DESCRIPTION AND OPERATION
1. GENERAL (Figure 1)
The transponder is an integral part of the Air Traffic Control Radar Beacon System (ATCRBS).
The transponder allows the operational air traffic service to identify the aircraft.
The optional system consists of :
- the A56 transponder,
- the E36 transponder antenna. The transponder receives altitude information from the optional encoding altimeter - refer to 34-11-00.
A desensitization line connects A56 transponder to the optional DME installation - refer to 34-55-00.
The transponder is electrically supplied by "BUS 1" and / or "BUS 2" bar(s) via the master radio relay.
2. LOCATION (Figure 2)
COMPONENT QTY AREA ACCESS DOOR REFERENCE
A56 transponder 1 254R or
251C / 34-50-00
E36 transponder antenna 1 210 215 34-53-03
Circuit breaker : - CB90 "XPDR" 1 230 232L WM
3. DESCRIPTION A. A56 transponder
A56 transponder transmits a coded response to an interrogation transmitted by an air traffic control ground radar station. The coded response contains the aircraft identification code and altitude information.
A56 transponder is a rectangular box installed in a mounting tray. Connections are made through one electrical connector and an antenna connector on the back panel.
On the front panel, mode and code selection are performed by the rotary knob and push-button switches.
All functions including flight level altitude and identification code are shown on the gas discharge display.
On the ground, the secondary radar sends interrogations to the aircraft to which A56 transponder provides a response.
To each interrogation from the secondary radar, A56 transponder transmits :
- a coded response corresponding to the aircraft identification code assigned by the ground control station (mode A),
- the identification code and a coded response indicating the aircraft flight level (mode C).
The interrogation and the response of A56 transponder are transmitted on two different frequencies (1030 MHz and 1090 MHz).
AEAD
Validity : KT 76C 34-53-00 (.,„)Page 1
JUN 04
A56
TRANSPONDEUR
TRANSPONDER
INTERROGATEUR
DME
DME
INTERROGATOR
—d2-6-1- BUS 1
"XPDR" "RM.SWITCH"
D5 F2 •
OFF
BUS 3
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本文链接地址：TB20 MAINTENANCE MANUAL 34 导航 TB20飞机维护手册 2(20)
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