[PLUG-TALK] Fluke 87 multimeter

Denis Heidtmann denis.heidtmann at gmail.com
Wed May 25 10:04:55 PDT 2011

On Tue, May 24, 2011 at 11:54 AM, Aaron Burt <aaron at bavariati.org> wrote:

> On Mon, May 23, 2011 at 02:55:41PM -0700, Denis Heidtmann wrote:
> > On Mon, May 23, 2011 at 12:07 PM, Aaron Burt <aaron at bavariati.org>
> wrote:
> > > I'd probably also put an optisolator on the output of of the speaker,
> to
> > > keep the Magic Smoke inside my PC.
> >
> > I do not understand.  Are not sound waves isolation enough?
> I had assumed you would use a direct electrical connection to the speaker
> output, rather than a mic.  Mic might be harder.  It'll be interesting to
> hear how it goes!

There is serious doubt that I will actual make the instrument described, but
I intend to at least look at some microphone output waveforms.  So far, I do
not believe that my microphone has the high frequency response necessary.
 However, Fluke documents seem to indicate that the feature was used during
final test, presumably via a microphone.

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