[BC] FAA RF rulemaking

[Dave Dunsmoor]

    Well, my experience has been spurs, (energy generated and radiated well
outside the frequency of interest). Say perhaps a transmitter on 93.7
generated a ninth harmonic that landed directly on top of one of a cell
tower's channels. Or one that generated "extra" channels up and down the FM
band. In another case, a spur landed right on, (or close to) the VOR
frequency, and the FM had to be shutdown until it's IPA was repaired Anyway,
that's where I heard the problem was.

    IMD is slightly different, but can cause similar problems, and that is
usually avoided by frequency and siting selections.

Dave



> At 06:54 PM 6/27/2006, Dave Dunsmoor wrote
> >It's been my experience that NAV and Comm frequencies
> >are not bothered by "overload" so much but by RFI from transmitters
outside
> >the NAV/COMM frequency bands. Specifically FM transmitters, and they do
> >generate spurs occasionally.
>
>          Are you talking about intermod products, Dave?