[Discuss-gnuradio] Testing crystal accuracy

[Jason Matusiak]

I have a handful of the NooElec blue USB DVB-T receivers that we
occasionally use at work.  I managed to get a hold of a TCXO to replace
the crystal on the board for an attempt at better accuracy (with less
drift).

The dongle seems to be functioning fine (so I know that the oscillator
is functioning OK), but I can't seem to figure out a way to quantify how
much of an improvement I can realize from the swap (if at all).

Is there something simple I am missing that I can do in a GRC script to
test the difference between a modified and unmodified dongle to compare
the benefits of the TCXO?