how to analyse a waveform?

[Max Fazio]

Hi all , first post here.
I'd like to make an harmonic and DC bias analysis of the waveform coming
from a synthesizer's VCO; I'd like to make an analysis of the sine output ,
which features some extra harmonics though, but I want to get the best
result possible, that is without any influencing artifact coming from the
audio output.
How can I do that? What tools should I use?
Thx for your kind help.
M

 

[Ray L. Volts]

"Max Fazio" <faxiomas@virgilio.it> wrote in message
news:445f503b$0$14776$4fafbaef@reader4.news.tin.it...

Hi all , first post here.
I'd like to make an harmonic and DC bias analysis of the waveform coming
from a synthesizer's VCO; I'd like to make an analysis of the sine output
,
which features some extra harmonics though, but I want to get the best
result possible, that is without any influencing artifact coming from the
audio output.
How can I do that? What tools should I use?

How healthy is your bank account?

At a bare minimum, an oscilloscope tops the list.
To accurately measure complex waveform parameters, you need a scope with a
readout to avoid interpolation and parallax evaluation errors. It also
makes the job much quicker.
Cursor scopes are widely available now, but can be hard for some to use.
Sencore scopes use a separate display apart from the crt, and I'm very fond
of mine.
If you want to directly compare different waveforms, you'll want a DSO
(Digital Storage Oscilloscope).

A good quality spectrum analyzer can be a big help.

A tunable harmonic distortion analyzer helps measure harmonic levels.
Generally, with audio gear, this is displayed as a percentage. Again, with
a scope readout, you can zero in on specific waveform components to measure
amplitude, frequency, deltas, etc.

Good luck!

 

[Michael A. Terrell]

"C. Nick Kruzer" wrote:

Hi Max, you wrote:

"What tools should I use? Thx for your kind help."

Sounds like a job for an oscilloscope! I read that there is computer
software available that can be used to make your cyber set-up work as
an
oscilloscope, so you might not have to go out and buy/rent/borrow one.

I don't know how to use an oscilloscope so I can't give a complete and
definitive answer here.

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