"AndyS" wrote in message
ups.com...
I liked using the old Telonic sweep generators, with the two big
dials, and a diode detector/scope to scan the filter bandpass.
I don't have one, or access to one anymore, and have to do
it by hand.....

Perhaps I'm spoiled by having access to VNAs and spectrum analyzers with
tracking generators. :-)

It's sad that *good* spectrum analyzers are still quite spendy, even on the
used market. There are several "homebew" spec. ans. out there that are quite
impressive, but none that come close to even something like a 15 year old HP
8594.

---Joel