[BC] FAA RF rulemaking

[Mike McCarthy]

Dave,

I'm not suggesting the FAA not seek to protect the spectrum which aircraft 
radio traffic operates.  I am suggesting that they tighten specs for RITOI 
and such in receivers to prevent BFO RFI.  It's my understanding the 
receiver standards for avionics have not been updated in many years. 
Further, they need to so through the FCC, the licensing agency for 
non-federal government RF emissions.

While commercial operations have much better avionics than the general 
operations, the FAA can't look to the broadcasters to solve all of their 
reception problems.

I also have used the FAA's NAV/COM program when it was last updated. It was 
to say the least a joke.

Finally, the FAA needs to consider broadcasters using anything above 107.1 
before they simply light up a VOR below 109.  If they took their blinders 
off and looked where broadcasters TX's are located, they might avoid some 
BFO issues.

Cheers....

MM

At 08:54 PM 6/27/2006 -0500, Dave Dunsmoor wrote

> > Agreed....  FAA should properly regulate the air space and aircraft and
>the
> > FCC and NTIA regulate spectrum.
> >
> > MM
>
>
>I thought I might inject my perspective here. We broadcasters light and
>paint towers because it's safer for all that fly for us to do so.
>
>Also, the FAA would like the communications and navigation frequencies to
>contain only NAV and comm signals because it's safer for all that fly for
>this to be so as well. 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.
>
>And it makes little, if any, difference that aircraft NAV and COMM radio
>gear uses AM vs FM. (actually, FM wouldn't work). If an AM or FM clockradio
>in the kitchen or in the car experiences some noise from some outside
>source, it's (relatively) no big deal. If the same interference is generated
>in an ILS or VOR receiver, then it can be a big deal, and that's why the FAA
>is so protective of their spectrum. It's a matter of safety, and can be a
>life and death situation.
>
>And that's my view. I'm not in the rulemaking business, not in the
>enforcement business, no the inspection business, I just keep the stuff on
>the ground working correctly.
>
>Dave Dunsmoor
>
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