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Article #862Re: Rigol caught with their pants down! (DS1052E Oscilloscope)
From: blackhead
Date: Mon, 20 Jul 2009 11:00
Date: Mon, 20 Jul 2009 11:00
45 lines
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3051 bytes
On 20 July, 10:06, Ray <s...@spamalot.com> wrote: > blackhead <larryhar...@softhome.net> wrote innews:0268880f-5658-44fe-8908-579f2f1031ba@s31g2000yqs.googlegroups.com: > > > > > > > On 19 July, 23:02, "David L. Jones" <altz...@gmail.com> wrote: > >> John Larkin wrote: > > >> > Do the scopes work? > > >> Yep, they work. So Rigol are obviously getting away with it by hook > >> or by crook. > >> If AD are deliberately under-speccing their normal chips, then it's a > >> clever ploy by Rigol to exploit it. > > >> Dave. > >> -- > >> --------------------------------------------- > >> Check out my Electronics Engineering Video Blog & > >> Podcast:http://www.alternatezone.com/eevblog/ > > > So give it a 1 Ghz signal and see if it it looks right then. > > Umm, no. Ever heard of Nyquist? > > Plus to see anything like a signal for your eye's benefit, you're better > off with x10 sampling. > > So 100MHz is more on the mark. Does it allow you to simply plot the points > without the "join the dots"? > > BTW if you had exactly 1GHz going in, and it manged to sneak pass the front > end, you'd end up with a straight line at some DC level. > > Ray- Hide quoted text - > > - Show quoted text - I have heard of Nyquist, just forgot to apply him in this case :) There will be an anti aliasing filter in the front end so you wont see much if you put in anything close to half the sampling rate = 500Mhz. Or maybe Rigol has decided to cut corners and got rid of it completely ;)
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X-Google-Thread: a5a6238865,22f414e979f56ad3 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!postnews.google.com!a7g2000yqk.googlegroups.com!not-for-mail From: blackhead <larryharson@softhome.net> Newsgroups: sci.electronics.design,aus.electronics Subject: Re: Rigol caught with their pants down! (DS1052E Oscilloscope) Date: Mon, 20 Jul 2009 04:00:47 -0700 (PDT) Organization: http://groups.google.com Lines: 48 Message-ID: <f68bfd0f-8827-4cb3-8b05-c9e0ddec8ec4@a7g2000yqk.googlegroups.com> References: <9ZD8m.24080$Qg6.2130@newsfe14.iad> <18i665p468as493tdqltq8ms0iqqm9c34n@4ax.com> <NJM8m.24727$FP2.3819@newsfe05.iad> <0268880f-5658-44fe-8908-579f2f1031ba@s31g2000yqs.googlegroups.com> <Xns9C4EC24DB90B6zathranetpacenetau@216.196.97.142> NNTP-Posting-Host: 82.24.86.223 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Trace: posting.google.com 1248087648 7813 127.0.0.1 (20 Jul 2009 11:00:48 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Mon, 20 Jul 2009 11:00:48 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: a7g2000yqk.googlegroups.com; posting-host=82.24.86.223; posting-account=3o_3nAoAAABqcChZ1_OFyK0eqWoq4vXX User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; InfoPath.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30),gzip(gfe),gzip(gfe)