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From: karl AT aspodata DOT se
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] Equipment
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Comments: In-reply-to "Peter Stuge (peter AT stuge DOT se) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
   message dated "Mon, 03 Sep 2018 06:53:03 -0000."
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Date: Mon,  3 Sep 2018 11:33:47 +0200 (CEST)
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Peter Stuge:
> karl AT aspodata DOT se wrote:
> > I'm contemplating buying an oscilloscope.
> 
> It's a good tool.

Yes:)

I already have a 200HMz analogue one, but I'd like to be able do
single-shot captures.

> > My guess is that for normal analogue and i2c,rs232,spi things I'd
> > be happy with a four channel 200MHz one with suitable triggers.
> 
> I'd suggest a hardware supported by https://sigrok.org/ for digital
> protocols,

Ok, but it seems none of the higher end scopes are supported.

> but having a scope which also has digital inputs is quite
> nice, but usually comes with a relatively hefty pricetag.
...

 This set has it:
https://se.farnell.com/rohde-schwarz/r-s-hmo3054-hoo10-hoo12-hoo14-ho3516/oscilloscope-kit-hmo-complete/dp/2448547
and the price is ok.

> > But I also want to be able to do pre emi/emc certification test.
> > Any suggestion what spec and equipment to use for that...
> 
> Sorry - don't know about that part. I think that's another league,
> quite likely involving a high end spectrum analyzer. (For the
> *un*-expected emissions.)

Yes, according to
 http://www.analog.com/media/en/analog-dialogue/volume-51/number-4/articles/volume51-number4.pdf
page 12, you need a 1 to 6GHz scope for transient analysis.

But I don't think you need a high end spectum analyzer. My guess is 
that something like 10kHz to 6-10GHz would suffice for pre-cert. tests.
you don't need to do everything.

Regards,
/Karl Hammar

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