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Home > Exam Questions > ATPL - Airline Transport Pilot Licence > Radio Navigation > Which of the following statements concerning the variable, or directional, signal of a conventional VOR is correct?

43 - ATPL Question Bank in English - Which of the following statements concerning the variable, or directional, signal of a conventional VOR is correct?

Question 43 - Radio Navigation - ATPL - Airline Transport Pilot Licence

The transmitter changes the frequency of the variable signal by 30 Hz either side of the allocated frequency each time it rotates

The transmitter varies the amplitude of the variable signal by 30 Hz each time it rotates

The receiver adds 30 Hz to the variable signal before combining it with the reference signal

An electronically rotating field pattern at 30 cycles per second produces 30 Hz amplitude modulation whose phase varies with azimuth.

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