[Discuss-gnuradio] test equipment

[cswiger]

Thanks to Eric for making it so we can change DDC frequency w/o
disturbing their phase, I can now measure the magnitude AND
phase response of a network over a wide range, transmission
and/or reflection (like an antenna). Smith charts can't be
too far behind.

http://webpages.charter.net/cswiger/phase/vna_10.html

--Chuck