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DME System Principles

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Questions and Answers

What is the purpose of adjusting the PRF in the DME system?

To switch off is identification

To avoid self-triggering of the receiving equipment

To cope with all aircraft (correct)

To reply to the 100 strongest signals

Why are different frequencies used for transmitting and receiving in the DME system?

To permit more channels in the system

To prevent overload of the system

To prevent self-triggering of the receiving equipment (correct)

To avoid reception of signals referring to other aircraft

What occurs when the transmitter moves away from the receiver due to the Doppler effect?

An apparent increase in the transmitted frequency

No change in the transmitted frequency

The frequency becomes undefined

An apparent decrease in the transmitted frequency (correct)

What is the principle behind the Doppler Navigation System?

Doppler shift in frequency (A) Signup and view all the answers

What happens to the transmitted frequency when the transmitter and receiver move towards each other?

It increases (B) Signup and view all the answers

What is a characteristic of the navigation database in the FMS?

It is read-only to the pilot (C) Signup and view all the answers

Where is data relating to waypoints stored in the FMS?

Navigation database (D) Signup and view all the answers

What is the purpose of the DME system?

To reply to the nearest 100 aircraft (A) Signup and view all the answers

What occurs when the transmitter moves towards the receiver due to the Doppler effect?

An apparent increase in the transmitted frequency (D) Signup and view all the answers

What is the benefit of using different frequencies for transmitting and receiving in the DME system?

It prevents self-triggering of the receiving equipment (C) Signup and view all the answers