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Article #964Re: An unusual Oscilloscope phenomenon
From: David L. Jones
Date: Sat, 27 Jun 2009 02:25
Date: Sat, 27 Jun 2009 02:25
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The Phantom wrote: > On Fri, 26 Jun 2009 13:41:07 +1000, "David L. Jones" > <altzone@gmail.com> wrote: > > >> >> It's not only about waveforms-per-second, it's also about the >> capture and display engine as well. >> The manufactuers have various technologies (e.g. Tek Digital >> Phosphor) to make their digital scopes have an "analog type" display >> and response, and they work superbly. In fact they can be better >> than analog in many respects. But that performance costs money, so >> you have to start paying around say the $5K mark before you get a >> digital scope that really performs like an analog one in terms of >> variable display intensity, response time, and capture dead-time. >> See here for more info: >> http://www.tek.com/products/oscilloscopes/dpo_technology/ >> http://www.tek.com/Measurement/App_Notes/Technical_Briefs/55-13757/eng/55w-13757-0.pdf >> >> Lower end scopes don't have these "analog like" display >> technologies, so then "waveforms-per-second" is pretty much the >> basic benchmark. Modern scopes are pretty darn good though, and even >> the low end cheap ones are streets ahead of previous generation >> DSO's. >> Those who haven't used a modern high end digital scope don't know >> how superb they can really be. >> >> With modern fast real-time deep memory scopes, aliasing is pretty >> much a thing of the past. > > Is that an Agilent 6000 series scope I see in front of you? It is indeed. In fact, it's that exact same setup where I first found this issue, debugging that actual design as you see there, probably only days before or after that photo was taken. Dave. -- --------------------------------------------- Check out my Electronics Engineering Video Blog & Podcast: http://www.alternatezone.com/eevblog/
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X-Google-Thread: a5a6238865,2fb4482ba391e6 X-Google-Attributes: gida5a6238865,public,usenet X-Google-NewGroupId: yes X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news2.google.com!news2.google.com!npeer02.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!post01.iad.highwinds-media.com!newsfe01.iad.POSTED!a2502347!not-for-mail From: "David L. Jones" <altzone@gmail.com> Newsgroups: sci.electronics.design,aus.electronics References: <h8B0m.53620$FI5.3564@newsfe12.iad> <4a442bbf$0$57661$892e0abb@auth.newsreader.octanews.com> <BrX0m.53136$lB7.20423@newsfe19.iad> <ml4945t7fpohoerflfk7vg5874gvgjd0dg@4ax.com> Subject: Re: An unusual Oscilloscope phenomenon Lines: 45 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 X-RFC2646: Format=Flowed; Original Message-ID: <fqf1m.58$4Q1.29@newsfe01.iad> X-Complaints-To: abuse@teranews.com NNTP-Posting-Date: Sat, 27 Jun 2009 02:25:15 UTC Organization: TeraNews.com Date: Sat, 27 Jun 2009 12:25:14 +1000