Turn your Rigol DS1052E Oscilloscope into a 100MHz DS1102E
in [Design]
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From: JosephKK on 8 Apr 2010 23:02 On Thu, 08 Apr 2010 16:49:13 GMT, nico(a)puntnl.niks (Nico Coesel) wrote: >"JosephKK"<quiettechblue(a)yahoo.com> wrote: > >>On Wed, 07 Apr 2010 17:17:53 GMT, nico(a)puntnl.niks (Nico Coesel) wrote: >> >>>"David L. Jones" <altzone(a)gmail.com> wrote: >>> >>>>John Larkin wrote: >>>>> On Tue, 06 Apr 2010 19:34:32 -0700, >>>>> "JosephKK"<quiettechblue(a)yahoo.com> wrote: >>>>> >>>>>> On Mon, 05 Apr 2010 21:45:57 -0700, John Larkin >>>> >>>>Yup, economy of scale and other factors. >>> >>>>and the 470MHz at $12K+: >>>>http://www.tequipment.net/IwatsuSS-7847A.html >>>>Ouch! >>> >>>They are a lot cheaper second hand because no-one wants an analog >>>scope anymore. $500 should be enough. >> >>There is still a few us who want one. I am still on the lookout for=20 >>a Tek 2465 or very similar. There are cases where even my TDS 544A=20 >>won't get me the same results. > >The Iwatsu SS-7847A is a very good oscilloscope and less old than the >2465. The Tek 2465 has not been made for many years, the only ones available are used. And guess what, they are a damn sight less than $12000. My current use is more like (kind of well off) expert hobbyist. Guess which one fits my needs best.
From: John Larkin on 8 Apr 2010 23:16 On Thu, 08 Apr 2010 19:52:47 -0700, "JosephKK"<quiettechblue(a)yahoo.com> wrote: >On Thu, 08 Apr 2010 17:36:30 -0500, "krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote: > >>On 8 Apr 2010 14:14:01 -0500, The Phantom <phantom(a)aol.com> wrote: >> >>>On Thu, 08 Apr 2010 17:06:06 GMT, Jan Panteltje <pNaonStpealmtje(a)yahoo.com> >>>wrote: >>> >>>>On a sunny day (Thu, 8 Apr 2010 08:57:53 -0700 (PDT)) it happened brent >>>><bulegoge(a)columbus.rr.com> wrote in >>>><fb2980a4-6e02-48db-b20d-57eefa8df2a6(a)v8g2000vbh.googlegroups.com>: >>>> >>>>>On Apr 8, 10:01�am, John Larkin >>>>beep BAD SYNTAX >>>> >>>>>> I can't think of much. Maybe clean X-Y plots; the digitals are sloppy >>>>>> in X-Y mode. >>>>>> >>>>>> ftp://jjlarkin.lmi.net/Hills.JPG >>>>>> >>>>>> John >>>>> >>>>>When I am looking at video signals with higher power RF signals on the >>>>>board I will take an analog scope any day. >>>> >>>>I agree, for video an analog scope is great. >>>>In fact the *ONLY* reason for digital is storage, >>>>and even then good analog storage scope once existed. >>> >>>I can think of a particular aspect of digital storage that, AFAIK, analog >>>storage can't do. With digital storage, one can examine the signal BEFORE the >>>trigger point. Has there ever been an analog storage scope that could do that? >> >>Sure. Have you ever heard of delay lines? Also, delaying timebases were >>commonly used to look "before" the trigger event. There are applications >>where I'd still like a calibrated delayed timebase. Delay lines can't store milliseconds of pre-trigger data. The best they do is let you see a few ns of pre-trigger waveform. John
From: krw on 8 Apr 2010 23:25 On Thu, 08 Apr 2010 20:16:59 -0700, John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >On Thu, 08 Apr 2010 19:52:47 -0700, >"JosephKK"<quiettechblue(a)yahoo.com> wrote: > >>On Thu, 08 Apr 2010 17:36:30 -0500, "krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote: >> >>>On 8 Apr 2010 14:14:01 -0500, The Phantom <phantom(a)aol.com> wrote: >>> >>>>On Thu, 08 Apr 2010 17:06:06 GMT, Jan Panteltje <pNaonStpealmtje(a)yahoo.com> >>>>wrote: >>>> >>>>>On a sunny day (Thu, 8 Apr 2010 08:57:53 -0700 (PDT)) it happened brent >>>>><bulegoge(a)columbus.rr.com> wrote in >>>>><fb2980a4-6e02-48db-b20d-57eefa8df2a6(a)v8g2000vbh.googlegroups.com>: >>>>> >>>>>>On Apr 8, 10:01�am, John Larkin >>>>>beep BAD SYNTAX >>>>> >>>>>>> I can't think of much. Maybe clean X-Y plots; the digitals are sloppy >>>>>>> in X-Y mode. >>>>>>> >>>>>>> ftp://jjlarkin.lmi.net/Hills.JPG >>>>>>> >>>>>>> John >>>>>> >>>>>>When I am looking at video signals with higher power RF signals on the >>>>>>board I will take an analog scope any day. >>>>> >>>>>I agree, for video an analog scope is great. >>>>>In fact the *ONLY* reason for digital is storage, >>>>>and even then good analog storage scope once existed. >>>> >>>>I can think of a particular aspect of digital storage that, AFAIK, analog >>>>storage can't do. With digital storage, one can examine the signal BEFORE the >>>>trigger point. Has there ever been an analog storage scope that could do that? >>> >>>Sure. Have you ever heard of delay lines? Also, delaying timebases were >>>commonly used to look "before" the trigger event. There are applications >>>where I'd still like a calibrated delayed timebase. > >Delay lines can't store milliseconds of pre-trigger data. The best >they do is let you see a few ns of pre-trigger waveform. Enough to see what caused the trigger (and more than a few nS in some cases). Yes, DSOs are useful tools. I don't think anyone has said otherwise. The question was more about the utility of analog scopes, given that cheap DSOs are available.
From: JosephKK on 8 Apr 2010 23:25 On 8 Apr 2010 14:18:01 -0500, The Phantom <phantom(a)aol.com> wrote: >On Wed, 7 Apr 2010 15:58:46 +1000, "David L. Jones" <altzone(a)gmail.com> wrote: > >>John Larkin wrote: >>> On Tue, 06 Apr 2010 19:34:32 -0700, >>> "JosephKK"<quiettechblue(a)yahoo.com> wrote: >>> >>>> On Mon, 05 Apr 2010 21:45:57 -0700, John Larkin >>>> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >>>> >>>>> On Mon, 05 Apr 2010 21:28:29 -0700, >>>>> "JosephKK"<quiettechblue(a)yahoo.com> wrote: >>>>> >>>>>> On Tue, 6 Apr 2010 09:58:53 +0800, "Andrew" <anbyvbel(a)yahoo.com> >>>>>> wrote: >>>>>> >>>>>>> "John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote >>>>>>> in message news:kj2lr598g79va9rjpir1e1jaa0bvg90ji6(a)4ax.com... >>>>>>> >>>>>>>> If you don't like Rigol scopes, buy Tek or Agilent or LeCroy. >>>>>>>> >>>>>>>> Of course, the low-end Agilent is actually a Rigol. They rebrand >>>>>>>> it and sell it for about twice the price of the Rigol. How do >>>>>>>> you like that for rip-off-ness? >>>>>>> >>>>>>> >>>>>>> Wow, you just deprived Agilent of their hard earned cash, since a >>>>>>> lot of people will buy Rigol instead. >>>>>>> You should have kept this information to yourself. >>>>>> >>>>>> Bwahahahaha. That tidbit is kind of common knowledge around here >>>>>> (s.e.d). >>>>>> >>>>>> For some real interesting times go really hunting for fast analog >>>>>> scopes, they are available, though not inexpensive. 500 MHz is >>>>>> still reasonably available, for about the price of a modest car. >>>>> >>>>> Tek 7103s and 7104s, 1 GHz analog scopes with microchannel plate >>>>> CRTs, are fairly cheap on the used market. >>>>> >>>>> An 11801 sampler with a 12 GHz head can be had for under $2K. Nice >>>>> scopes. >>>>> >>>>> John >>>> >>>> John, i am talking about brand _new_ analog 'scopes. Probably with >>>> microchannel faceplates as well. All the old groovy Tektronix >>>> patents >>>> have expired. >>> >>> The only new analog scopes I know of are minor brands, >>> B&K/Instek/Kenwood sort of stuff. All the name-brand scopes are >>> digital now. LeCroy used to sell the 470 MHz Iwatsu scope, but I think >>> they gave that up. The Iwatsu SS-7840H is around $10K. And not even >>> color. It looks to me like digital scopes are less expensive at pretty >>> much every performance point. >> >>Yup, economy of scale and other factors. >> >>Iwatsu still do a 1GHz analog storage scope at $28K: >>http://www.tequipment.net/IwatsuTS-81000.html > >This one is very nifty, but looking at the block diagram in the downloadable >"technology" pdf file, it appears that the only way to watch more than one >channel at a time is in alternate or chopped mode. Also, unlike digital >storage, one can't look at events before the trigger point. > You sound as if this some kind of news. Having grown up with analog scopes, pretrigger recording is just not that big a thing for me. >> >>The 400MHz analog is $7500: >>http://www.tequipment.net/IwatsuSS-7840.html >>and the 470MHz at $12K+: >>http://www.tequipment.net/IwatsuSS-7847A.html >>Ouch! >> >>Hameg do a 200MHz analog at $2500: >>http://www.hameg.com/335.0.html?L=0 >>The Instek 200MHz one is $1800 >> >>Dave.
From: Tim Williams on 8 Apr 2010 23:26
"John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message news:ks6tr5h4k5jv51n0lp1is4hrs537v1rmse(a)4ax.com... > Delay lines can't store milliseconds of pre-trigger data. The best > they do is let you see a few ns of pre-trigger waveform. John John John, That's what entire spools of foamed teflon coax are for! ;-) Man, I can just imagine how many hours of cocaine you could buy for the price of a few microseconds of that sort of stuff. Seems kind of disappointing. Tim -- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms |