Re: Resonant Systems

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> 
> Original poster: "Paul Nicholson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <paul-at-abelian.demon.co.uk>
> 
> Ed Phillips wrote:
> 
> > feed a band-limited noise-like voltage into a scope and set the
> > trigger level near zero, the waveform near the trigger point will
> > be pretty much like a sinusoid, become more noisy as you look out
> > toward a time of 1/BW.
> 
> Good idea which demonstrates the point well.  Does this give us a
> neat way to measure secondary Q, given a suitable noise source
> (binary sequence gen, perhaps)?
> --
> Paul Nicholson
> --

	No, don't think so.  The time resolution of the trace is far too poor
for that, as is the accuracy of triggering.  The simple signal generator
and scope method is easy and will work far better.

Ed