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Functional Block Diagram of Secondary Radar

Transponder
Receiver
Decoder
Transmitter
Coder
Interrogator
Coder
Transmitter
Decoder
Receiver
PPI-screen
Synchronizer of
Primary Radar
Interrogation Path
(Uplink)
Replay Path
(Downlink)

Figure 1: Block diagram of a secondary radar

Transponder
Receiver
Decoder
Transmitter
Coder
Interrogator
Coder
Transmitter
Decoder
Receiver
PPI-screen
Synchronizer of
Primary Radar
Interrogation Path
(Uplink)
Replay Path
(Downlink)

Figure 1: Block diagram of a secondary radar

Transponder
Receiver
Decoder
Transmitter
Coder
Interrogator
Coder
Transmitter
Decoder
Receiver
PPI-screen
Synchronizer of
Primary Radar
Interrogation Path
(Uplink)
Replay Path
(Downlink)
© 2003 Christian Wolff (www.radartutorial.eu)

Figure 1: Block diagram of a secondary radar

In the interrogator on the ground:

The secondary radar set needs a synchronous impulse of the (analogous) primary radar set to the synchronization of the indication.

In the aircrafts transponder:

A receiving antenna and a transponder are in the airplane.

Again in the interrogator on the ground:

Publisher: Christian Wolff
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