Radio Navigationmedium#1102
The VOR reference signal is:
A
Amplitude modulated at 30 Hz, rotating in phase
B
A 30 Hz FM signal that is omnidirectional
C
A 9960 Hz sub-carrier FM modulated at 30 Hz, transmitted omnidirectionally
CorrectD
A 30 Hz signal rotating directionally
Explanation
The VOR reference signal is a 9960 Hz sub-carrier frequency-modulated at 30 Hz, transmitted omnidirectionally. The variable signal is a 30 Hz AM signal whose phase varies with azimuth.
Ready for a timed quiz?
Test yourself with random questions from Radio Navigation and all other ATPL subjects.
Start a Practice Quiz