Re: Digital Oscilloscopes

[Brian Whatcott <inet@INTELLISYS.NET>]

Wild guess, off the top:
10000. Vsig/sqrt(10000)Vnoise = 100

i.e I am supposing that averaging 10000 repetitive tracks
increases the sig/noise ratio by 20 dB

Brian

At 12:17 PM 5/28/02, you wrote:
> How many tracks should be averaged to reduce
> the noise level to 1% of what is in a single trace?
>
> Bernard Cleyet wrote:
>
> > One of the earlier "averagers" you describe is Nuclear Data's
> > Enhancetron.  In the 60's UCSC (advanced lab.) used one to "enhance" the
> > signal from ruby fluorescence.  The enhancetron came with a 256 channel
> > MCA and the display for both [single and average traces?].
>
> > Ludwik Kowalski wrote:
> > >
> > > The signal-to-noise ratio was not very high on my emf displays.
> > > But I was able to improve it by switching from the common
> > > SAMPLE mode of operation to the AVERAGING mode of
> > > operation. /snip/

Brian Whatcott
  Altus OK                      Eureka!