Found vintage #Tektronix sampling oscilloscope online with 20 GHz sampling + TDR modules installed at a great price. 🤓 But the screen in the photo actually displays a self-test failure :oh_no: Can either be a module fault (replaceable) or a mainframe fault (can be impossible to fix), let's see if I can convince the seller to do some tests... #electronics
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niconiconi (niconiconi@cybre.space)'s status on Thursday, 29-Jul-2021 20:19:52 CEST niconiconi -
niconiconi (niconiconi@cybre.space)'s status on Thursday, 29-Jul-2021 20:19:46 CEST niconiconi Great news, my #Tektronix 11801 oscilloscope mainframe has shipped! Can't wait to do some 20 GHz measurements at femtosecond resolution! #electronics
Ekaitz Zárraga 👹 repeated this. -
niconiconi (niconiconi@cybre.space)'s status on Thursday, 29-Jul-2021 20:19:46 CEST niconiconi Too bad that a vintage 20 GHz oscilloscope is still unable to do any USB 3.0 testing because there's no clock recovery, and you CANNOT trigger the scope from an external clock either because USB uses spread spectrum clock. The best thing it can do is TDR, which should be good enough, but still leaves a lot to be desired. The brutal reality of high-speed digital systems - $30,000 test equipment needed to verify a $10 disposable computer gadget. #electronics #usb
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niconiconi (niconiconi@cybre.space)'s status on Thursday, 29-Jul-2021 20:19:47 CEST niconiconi Sad ending. The vendor said the oscilloscope I wanted was listed online for a long time without any buyer, so it has already been completely dismantled by the company for parts. :oh_no: RIP, scope. Tektronix CSA803 & 11801 were the best engineered sampling oscilloscopes from the early 1990s. #electronics
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niconiconi (niconiconi@cybre.space)'s status on Thursday, 29-Jul-2021 20:19:47 CEST niconiconi Found another #Tektronix 11801 mainframe. I hope I get better luck this time. #electronics
Ekaitz Zárraga 👹 repeated this. -
niconiconi (niconiconi@cybre.space)'s status on Thursday, 29-Jul-2021 20:19:48 CEST niconiconi Ha, the scope seller said they are on a business trip and will take a look of the scope for me later. Good news. #electronics
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niconiconi (niconiconi@cybre.space)'s status on Thursday, 29-Jul-2021 20:19:50 CEST niconiconi Continue my hunt of old test equipment above 1 GHz. Last week I ordered a similar Tektronix sampling oscilloscope from another seller, but it's still not shipped yet. I'm not sure whether the vendor wants to sell it at this point... :blobshrug: Finding a cheap one is the exception rather than the rule (*), but I'll continue searching for them... #electronics
(*) unless you live in the Silicon Valley or near the MIT, both locations have the biggest electronic flea markets in the U.S., you can find a lot of unusual equipment there...
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niconiconi (niconiconi@cybre.space)'s status on Thursday, 29-Jul-2021 20:19:51 CEST niconiconi Sent a message to the seller. I was told the machine was already sold since a long time ago :blobshrug:
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