Displaying phase and amplitude variation of filter / transformer?

Hi,

Are there any grc flowgraphs out in the wild that visualize the phase
and
amplitude variation of a given system like some LC filter or
transformer,
when you tweak with it? My idea is to output a sinoidal signal of maybe
some
hundred kHz, feed it through the system of interest, and then watch it
on a
xy scope. Not a big deal, a matter of putting together some standard
blocks,
but maybe there is already a neat and tidy example available, with some
gain
control, agc, band filter and such?

With best regards

Ralph.

Ralph A. Schmid
Mondstr. 10
90762 Frth
+49-171-3631223
[email protected]
http://www.bclog.de/