[sdiy] Measuring filter response

[David G Dixon]

I suppose another problem is that one should actually use an exponential
voltage ramp, in order to see the log response.

> Note that the frequency scan does have to be "slow", because 
> the filter will behave strangely otherwise.
> Exactly HOW slow, I do not know.
> 
> paul perry Melbourne Australia
> 
> ----- Original Message -----
> From: "David G Dixon" <dixon at mail.ubc.ca>
> To: "'Neil Johnson'" <neil.johnson97 at ntlworld.com>; 
> <synth-diy at dropmix.xs4all.nl>
> Sent: Tuesday, August 16, 2011 5:45 AM
> Subject: Re: [sdiy] Measuring filter response
> 
> 
> >I once read in an old textbook (pre-computer, pre-digital 
> scope) about 
> >using  a slow sawtooth to ramp the filter frequency, and also using 
> >this saw to  trigger the scope, then just feeding a sine to 
> the filter 
> >and looking at  the  response.  Has anybody tried that?
> >
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