Radio Navigationhard#1180
The localizer uses which modulation tones?
A
400 Hz and 1300 Hz
B
30 Hz and 9960 Hz
C
90 Hz and 150 Hz
CorrectD
1020 Hz and 3000 Hz
Explanation
The ILS localizer uses 90 Hz and 150 Hz modulation tones. The 90 Hz predominates on the left of centerline (facing the runway) and 150 Hz on the right.
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