"Michael Coslo" wrote in message
...


snip

There are some nice features about hunting down RFI problems with sound.
That parabolic reflector can be aimed right at the pole, and in
combination with the short wavelength esp at ultrasonic frequencies will
let you zoom in on the problem pretty quickly.

Funny ... how our minds work -- or don't work. I wrestled with the idea of
ultrasonic, trying to make sense of snooping for weak, high-order harmonics,
vice audible sounds. Despite a quarter century of regular exposure to
satellite dishes, personal and professional, I overlooked the fact that
dishes are more directive at shorter wavelengths.

Doh!

Sal