[sdiy] DSO recommendation please

[karl dalen]

just my 5 cent on the matter.

For example depending on what to measure one rule of thumb are that you
do want to see the third and fifth harmonic of a signal to determine whether they cause trouble in your circuit.

Otherwise i wouldn't spend on any DSO with low numbers of memory, low numbers of memory shows thats its an old DSO design and by that its overpriced. 6k samples are something you would find back in early 90ies.
You could easily find some B/W HP 100Mhz  for some 100-250 euro (as suggested previously)

If i had 600ukp i would go for an fresh used analog with great BW, 
something like an old HP or Tek 500Mhz sometimes they sample to and
some even have some additional peculiar functions. assume you would
like to see your 40Mhz PICdsp clk then you would really need BW rather then lots of memory.

But again it really deepens on what you are going to measure.

Reg
KD




--- Den sön 2010-04-04 skrev Tom Wiltshire <tom at electricdruid.net>:

> Från: Tom Wiltshire <tom at electricdruid.net>
> Ämne: Re: [sdiy] DSO recommendation please
> Till: "synth-diy diy" <synth-diy at dropmix.xs4all.nl>
> Datum: söndag 4 april 2010 16.00
> Thanks for all the pointers
> everyone.
> 
> I've got a more specific question now. Amongst scopes in my
> price range, some seem to have better displays and less
> storage memory, others smaller displays and bigger memory.
> The difference can be significant. The cheap OWON scopes
> have 6000 samples memory, whereas the cheap Rigol scopes
> have 1 or 2 million.
> 
> Which of these two parameters is the most important in your
> opinion? Presumably the ability to zoom in substantially
> mitigates against the smaller screen.
> 
> Thanks,
> Tom
> 
> 
> 
> On 3 Apr 2010, at 20:39, Neil Johnson wrote:
> 
> > Hi,
> > 
> > ASSI wrote:
> >> It is much easier to do that with a logic analyser
> that understands
> >> the serial protocol and shows you what the signals
> _mean_ rather than
> >> just wiggles.  Again, to that end I've bought
> a USB2.0 based one from
> >> www.saleae.com (actually through www.elmicro.com
> since I bought a
> >> bunch of other stuff, too).  It goes up to
> 24MHz if used on it's own
> >> highspeed USB port, which is good enough for what
> I want to look at.
> > 
> > For USB logic analyser both myself and Peter Ullrich
> recommend the Intronix LA1034 ones:
> > 
> >    http://www.pctestinstruments.com/
> > 
> > Cheers,
> > Neil
> > --
> > http://www.njohnson.co.uk
> > 
> > 
> > 
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