Very fast oscilloscopes
in [Design]
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From: Joel Koltner on 30 Apr 2010 18:47 "Joerg" <invalid(a)invalid.invalid> wrote in message news:8414h0Fe3uU1(a)mid.individual.net... > My Instek starts in about a couple of seconds :-) I'd wager dollars to donuts that if your Instek even *has* an operating system as such at all, it's something they wrote themselves...
From: Robert Baer on 30 Apr 2010 23:35 Kevin McMurtrie wrote: > In article <NPiCn.291919$Vq1.192861(a)en-nntp-03.dc1.easynews.com>, > "Joel Koltner" <zapwireDASHgroups(a)yahoo.com> wrote: > >> I bet Agilent wants a pretty penny for their new 32GHz real-time scopes: >> http://cp.literature.agilent.com/litweb/pdf/5990-5271EN.pdf >> >> And to think that it was only ~20 years ago that a Tek 11802 with the SD-24 >> (24GHz) sampling head -- that samples at all of 100kHz -- was the hotest >> ticket... now available on eBay for some single-digit percentage of the >> original price... >> >> ---Joel > > It's a little scary that such an expensive piece of precision hardware > runs Windows. Whatever happened to using simple embedded operating > systems that don't have a zillion extra features to crash? ?Everyone ran out of love? (KISS)?
From: Jamie on 1 May 2010 12:04 Kevin McMurtrie wrote: > In article <NPiCn.291919$Vq1.192861(a)en-nntp-03.dc1.easynews.com>, > "Joel Koltner" <zapwireDASHgroups(a)yahoo.com> wrote: > > >>I bet Agilent wants a pretty penny for their new 32GHz real-time scopes: >>http://cp.literature.agilent.com/litweb/pdf/5990-5271EN.pdf >> >>And to think that it was only ~20 years ago that a Tek 11802 with the SD-24 >>(24GHz) sampling head -- that samples at all of 100kHz -- was the hotest >>ticket... now available on eBay for some single-digit percentage of the >>original price... >> >>---Joel > > > It's a little scary that such an expensive piece of precision hardware > runs Windows. Whatever happened to using simple embedded operating > systems that don't have a zillion extra features to crash? They want you to upgrade when MS upgrades.. Just think of that cash machine! :)
From: a7yvm109gf5d1 on 1 May 2010 16:51 On Apr 30, 11:55 am, John Larkin <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote: > On Thu, 29 Apr 2010 09:52:59 -0700, "Joel Koltner" > > <zapwireDASHgro...(a)yahoo.com> wrote: > >I bet Agilent wants a pretty penny for their new 32GHz real-time scopes: > >http://cp.literature.agilent.com/litweb/pdf/5990-5271EN.pdf > > >And to think that it was only ~20 years ago that a Tek 11802 with the SD-24 > >(24GHz) sampling head -- that samples at all of 100kHz -- was the hotest > >ticket... now available on eBay for some single-digit percentage of the > >original price... > > >---Joel > > I recently got this email from my friend Mark Kahrs, the > sampling-scope-history expert: > > ========================== > > Yes, the former Soviets did have a 7 GHz real time scope, and a 20 GHz > transient digitizer. They both used the same technique to get the > super high speed keep the deflection angle low. > > When I managed a design project in the transient digitizer group at > Tek, I went on a customer visit and met with engineers working for > EG&G at the Nevada Test Site. The time was after Glasnost, near the > end of the era of underground testing. A delegation of Soviet > scientists were actually invited over to witness a test shot (They did > the same, hosting a group of scientists from Livermore National Labs). > EG&G was using the new 3 GHz transient digitizer from Tek, and thought > its "leading edge" technology would impress their former foes. The > Soviets were not impressed, stating that they had a 20 GHz digitizer. > How did they do it? They way they surpassed many obstacles by not > placing needless restrictions on the technology. A design requirement > for the US made digitizers was that they must fit in a standard 19" > rack. The Soviets took a pragmatic approach, and avoded any size > restrictions. The CRT in their digitizer was just short of 10 m in > length! They used traveling wave distributed deflections plates as our > designs did, but the beam deflection angle was incredibly small, > allowing very high BW. Likewise, the 7 GHz real time scope had a CRT > over 3 meters long. I guess shipping would be a problem for these guys if they showed up on eBay.
From: John Larkin on 1 May 2010 18:00
On Sat, 1 May 2010 13:51:03 -0700 (PDT), a7yvm109gf5d1(a)netzero.com wrote: >On Apr 30, 11:55�am, John Larkin ><jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote: >> On Thu, 29 Apr 2010 09:52:59 -0700, "Joel Koltner" >> >> <zapwireDASHgro...(a)yahoo.com> wrote: >> >I bet Agilent wants a pretty penny for their new 32GHz real-time scopes: >> >http://cp.literature.agilent.com/litweb/pdf/5990-5271EN.pdf >> >> >And to think that it was only ~20 years ago that a Tek 11802 with the SD-24 >> >(24GHz) sampling head -- that samples at all of 100kHz -- was the hotest >> >ticket... �now available on eBay for some single-digit percentage of the >> >original price... >> >> >---Joel >> >> I recently got this email from my friend Mark Kahrs, the >> sampling-scope-history expert: >> >> ========================== >> >> Yes, the former Soviets did have a 7 GHz real time scope, and a 20 GHz >> transient digitizer. They both used the same technique to get the >> super high speed � keep the deflection angle low. >> >> When I managed a design project in the transient digitizer group at >> Tek, I went on a customer visit and met with engineers working for >> EG&G at the Nevada Test Site. The time was after Glasnost, near the >> end of the era of underground testing. A delegation of Soviet >> scientists were actually invited over to witness a test shot (They did >> the same, hosting a group of scientists from Livermore National Labs). >> EG&G was using the new 3 GHz transient digitizer from Tek, and thought >> its "leading edge" technology would impress their former foes. The >> Soviets were not impressed, stating that they had a 20 GHz digitizer. >> How did they do it? They way they surpassed many obstacles � by not >> placing needless restrictions on the technology. A design requirement >> for the US made digitizers was that they must fit in a standard 19" >> rack. The Soviets took a pragmatic approach, and avoded any size >> restrictions. The CRT in their digitizer was just short of 10 m in >> length! They used traveling wave distributed deflections plates as our >> designs did, but the beam deflection angle was incredibly small, >> allowing very high BW. Likewise, the 7 GHz real time scope had a CRT >> over 3 meters long. > >I guess shipping would be a problem for these guys if they showed up >on eBay. One scope I'd love to have is a Tek 519. It was 1 GHz with a distributed-deflection CRT and no vertical amp. I think it managed something like 1v/div, where "div" was 1 mm or some such. The sweep generator uses a 4CX250. This thing is so big and heavy it kicks sand in the faces of wimpy things like 547s. I do have a CRT, which I dug out of one, in the rain, in the parking lot of Los Alamos Sales. http://w140.com/tekwiki/wiki?title=519 http://w140.com/kurt/tek69/112.jpeg John |