I'm not sure why the XY display, but seeing 40db is about the limit.
You really need test equipment to get any meaningful results. Network
analysers that cover a few MHz aren't that expensive. You can also just
use a RF generator and power meter, which is a cheaper solution since
you don't need phase measurements to see attenuation.


Telamon wrote:
In article ,
"Brian Denley" wrote:

wrote:
How exactly does one see 60db down?



Very carefully!

Things start getting pretty dark after 40dB down so be very careful!

--
Telamon
Ventura, California