Re: Analog & Digital scope reads of Lown wave

Max65 wrote:
Well, he did not give us enough detail about the unwanted noise. It
usually helps to identify what that noise is and a scope with better
resolution can help. One good method would be for Ed to post a screen
shot.
I share your opinion, he should better explain us the problem, but it
could be he well knows that the problem wasn't real but just

Some of the lower end TDS don't have a data interface but a camera
shot would do as well.
It had but as optional device, as for the advanced triggers feature,
while the older portable THS7xx had instead as default(?!?!)


Their older "Scope Stations" had the feature, AFAIR.



Depends on how fast his glitches are.
I don't believe he have really seen any, and I believe that the heart
of an human doesn't matter of any nano seconds glitches (do you?)


I think he is looking at a defibrillator discharge curve. Minor glitches wouldn't matter but large spikes in there can become a serious problem.


I believe he just seen

As for delayed trigger many, for example the TDS220 we've used, didn't
do that.
I'm not sure what do you mean (excuse me, but I'm italian and english
is not my native language),


Bella Italia. Fond memories from several vacations there. Those are the vacations where you don't really want to leave anymore at the end.


Tell me if I understood: your TDS220 doesn't let you move the
horizontal position trigger out of the acquisition window?
May be I confused it with my own TDS2002, it has the "window" and the
"window zone" functions too that are similar to the delayed time-
base.
Anyways, tomorrow I'll be at office, there I still have one TDS210 and
I try with it and tell you about.


It's similar on the Instek GDS2204 here in the lab, you can move outside the window but pretty much all those scopes do not have essential support functions such as hold-off. IOW the trigger blows apart when you have multiple bursts.

But my main gripe with the TDS220 is the fact that it showed noise that really wasn't there. Cost me and my client almost half an hour until I discovered that it came out of the scope itself. That just isn't supposed to happen. That same week they bid on a Tek 2265 on Ebay and got it.


Nothing futile with realizing the limits of his tools and maybe borrow a
better one for a few hours. I've had that at clients where, for example,
we suddenly realized that a particular noise had the pattern of a cell
phone burst. With the scopes they had it could not be resolved.
I don't wanna to confuse him. I explain: if he read all what we wrote
above, he could believe we don't really have care of his problem, but
just talk about DSO (that's what we did ideed).


Well, that's what newsgroups do. It's a discussion just like in a pub. And a lot of great product ideas and problem solutions happen in pubs ;-)


Have a great day.

Massimo


--
Ciao, Joerg

http://www.analogconsultants.com/
.

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