John Larkin wrote:
I was playing with our new spectrum analyzer and decided to just hang
a 12" cliplead off the input to see what was floating around.

See pics. The biggest signal was about -26 dBm, an FM station I guess.
Just about every slot on the FM band is full.

There's also some stuff around 1.9 GHz, but not as big.

This spectrum analyzer does a good job of confining its own LCD
backlight noise, but my TDS2012, right nearby, sure doesn't!

With a field like this, we could likely put a modest dipole on the
roof and get enough power to light an LED.


John


The rf field survey for your work area is a good thing to keep tack of.
Sometimes you add gain ad in the midst of a prototype odd signal begin
to be sen. well with the rich f environment at high huge power levels
will be "seen" on your low noise designs, way before ktb or shot noise
or just a bad front end...

Marc