Re: Sine Waves

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

Original poster: "Sundog by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sundog-at-timeship-dot-net>

Hi All,

     A note here, while working on the tube coil, I sometimes get false
triggerings caused by noise in the waveform.  The antenna I'm using picks up
a fair amount of trash, so I set the scope to 20mhz bandwidth and turn
smoothing on.  This makes it easier to get solid triggering, at the expense
of signal clarity.  Usually I'll run the scope in smoothing mode to get the
frequency pegged, then I'll go back to "show me the money"..um, i mean "Show
me the whole nasty wave" so I can monitor the trash in the signal.  I have
yet to figure out the storage/glitch/capture functhions of my scope, but I
haven't played with them much.
        Just sharing my tidbits :)
---------------------------------
Shad (Sundog)
G-2 #1203
----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, February 15, 2002 9:57 PM
Subject: Sine Waves


> Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<davep-at-quik-dot-com>
>
>
> > Now when I see a perfect sine wave floating across the screen, and I
know
> > due to the laws of nature that there must be resistance in the circuit,
I
> > should be seeing a slight bump somewhere in the sine wave.
>
> Why?
> I fail to see why resistance should cause a bump.
>
> (is something else, say a synchronous switch of any sort, were
> adding energy synchronously, a bump might be seen.
>
> If an asynchronous switch of any sort were doing so, the
> 'bump' would 'wander around' from cycle to cycle and be
> invisible, unless single sweep/storage/digitizing scope
> were used....)
>
> > But I don't see it.  Was it smoothed out by the oscilloscope?
>
> Not if the 'scope is any good.
>
>
>
>