wrote in message
oups.com


It sounds like it would be much easier if you were back in
the
70's, with all those spectrum analyzers that were
available
back then.

Just because they aren't in the same form as they were then,
doesn't mean that they don't exist.

They came with a mic, and with pink noise or warble tones,
you
could get a rough look at what your looking for.

Modern stuff does more and has far higher resolution. Much
of it is computer-based.