"BTIZ" writes:


But VORs only receive, so how would the VOR disrupt the GPS?

There is no such thing as a pure receiver [1] at least in avionics.
Each receiver has one or more 'local oscillators' within. They leak
a little. If that leakage is in the wrong place at the wrong time...it
can get into other systems such as GPS.

"EMC" -- electromagnetic compatibility is a major issue any place
you have multiple emitters/receivers. Such problems can be hell to
narrow down. My FAAfriend talked about the Mode S system being tested
[ISTM it was on a FAA/NASA 757..] that would crap out for a ~minute
right before each landing. Seems when the nosewheel gear-door would
open during gear transit & that would bounce some radar altimeter
RF back into into the xponder antenna....





[1] Let's skip TRF's and other exotics...
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