1. ATC

2. What is ATC?
The ATC Transponder system is sometimes called Secondary Surveillance Radar (SSR).
It is a secondary radar system designed to automatically give Air Traffic Control (ATC) information.

3. ATC Information The information obtainable from the system is: -
Range & Bearing
Identity
Altitude
SSR Aerial
PSR Aerial

4. ATC System
Mode A – Identity
Mode C – Altitude reporting

5. ATC Block Diagram

6. OPERATION

7. ATC Aerials
ATC utilises an L-band aerial mounted on the bottom of the aircraft.
Received centre frequency is 1030 MHz.
Transmitted centre frequency is 1090 MHz.
Transmits an omni-directional vertically polarised signal.

8. ATC Testing Check the manual Remove the Arial Co-Axial TDR Test
Test the system (ATC-600A)