Re: What's a waveform monitor?

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

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

That's not a video waveform monitor (the original subject).. that's probably
a "dynamic signal analyzer", which does, in fact, do frequency and time
domain processing (typically, these days, with a fast a/d, and some DSP to
do transforms). You get nice waterfall plots, etc.  I suspect that looking
at a TC output, particularly with the measurement epochs synced to the power
line and/or triggered/rotary spark gap, might be quite interesting.

Most of the analyzers I've seen are oriented towards audio frequencies
(they're used a lot in shock and vibration testing, and looking for
mechanical/acoustic  resonances), and don't have the bandwidth needed for a
TC (say, several MHz), but that's not to say that such a device doesn't
exist (or could be simulated with a suitable data acquisition card.... A 10
MSPS card that could capture several seconds of data would be a slick
thing.. and not too pricey these days..)
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, November 30, 2002 3:07 PM
Subject: Re: What's a waveform monitor?


 > Original poster: "marc metlicka by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <mystuffs-at-orwell-dot-net>
 >
 >
 >
 > Tesla list wrote:
 >  >
 >  > Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>"
 > <jimlux-at-earthlink-dot-net>
 >  >
 >  > Waveform monitors don't do transforms.. They're basically oscilloscopes
with
 >  > very limited horizontal settings (i.e. 15.75kHz) and funky calibrations
on
 >  > the graticule.
 >  >
 >
 >   The true waveform display that i was privy to see, actually showed a
 > sweep of the peaks generated by each frequency being generated by the
 > tc.
 > with a standard scope you can see peak intensity of the spikes as a
 > slice, but how do you know at which frequency these are at?
 > I admit this is out of my expertise, but the difference astounded me
 > between the two.
 >
 > Also the waveform unit i saw in use would calculate a 3d furrier
 > transform giving a 6x8 plane with these frequencies shown at the
 > position of there magnitude, I was impressed.
 > Marc M.
 >
 >