[sdiy] DSO recommendation please

[Tom Wiltshire]

If I can hear the difference, I maybe don't need to see it on the  
scope anyway. For simply evaluating waveform quality, ears are  
perfectly good. Even if the scope were so good that it could display  
things that I couldn't hear, it wouldn't help me much, since if I  
can't hear the problem, I'm unlikely to care about it, at least for  
straightforward waveform outputs. The scope is for looking at stuff  
which goes past too fast to hear.

Often when I'm working on digital oscillators or something, there are  
bugs which lead to odd glitches. Being able to see those glitches in  
more detail often helps work out where the bug is. For this, speed  
and the storage facility are more important than bit depth accuracy/ 
resolution.

So, there are lots of things an 8-bit scope can do.

T.

On 4 Apr 2010, at 13:52, Colin f wrote:

>
>
>> Granted, you do have some quantization distortion and noise,
>> but that's at -50dB. It's not like most analog scopes have
>> higher accuracy than 0.5% either :).
>
> So you cant tell the difference on the scope between a pure  
> sinewave, and a
> sinewave overlaid with hideous periodic noise at -48db, and that's  
> assuming
> you have the sinewave perfectly aligned with FSD.
> But you can bet you will hear the difference.
> So what use is the 8-bit scope if it cant show you what you can  
> easily hear
> ?
>
> Cheers,
> Colin f
>
>
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