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Just acquired a TDS430a at auction that works! but has damage to front and back bezels from a drop. Are these unobtinium? Especially the front bezel (it's intact except for the tabs that hold it

The VOLTS/DIV knob for Both channels 1 & 2 will not rotate past the 5 volt indicator. The lower ranges act normally.It would be nice to have the 10/20/50 Volt ranges working. Searching 'here',it

I can't get eother Chanel 1 or 2 VOLTS/DIV

Just acquired a TDS430a at auction that works but has damage to front and back bezels from a drop.? Are these unobtinium??? Especially the front bezel? (it's intact except for the tabs that hold

I've used 3M surface mark remover: https://www.digikey.com/catalog/en/partgroup/mark-remover-8001/27728 To clean up equipment and it's worked pretty well. You need to wear gloves when you use it

Hello everybody My 7104 started having problems in displaying traces and readout characters, it did not happen suddenly, sometimes after switching off and on again everything went back to normal

Hi Jeff: First of all... we (at least I) have to give a shout out to Claude Shannon... and at least one other! (Shannon, Armstrong, and Mason are absolute heroes of mine!) Next... the theorem named

Steve, I'm sorry to advise the others here to disregard your post. You have made several profound misstatements here and elsewhere. If memory serves, you once posted (maybe on HP groups.io) similar

Holger, Well done; especially the wizard! This might be the world’s first time that USB has connected to magnetic core memory.

I don't have letters behind my name to make me an expert, but I did write an article some years ago for one of the trade journals, I forget which one, about the "Nyquist Frequency Fable". Two

The Nyquist sampling theorem (or Nyquist-Shannon or Whittaker-Nyquist-Shannon, etc., etc.) postulates that one must sample at a sampling rate of at least twice the highest frequency contained in the

Hi Nenad! You can find many information about the P7001 (and other Tektronix gear) on Tekwiki: https://w140.com/tekwiki/wiki/P7001 The USB interface of a Teensy can behave like a very fast COM port

To sidestep the math, here's a graphing exercise that seems to work for my students: Draw a sine wave. Pick off N equally spaced samples per cycle, then try to reconstruct by eye the original sine

Digital section is death, one PROM has bad CRC, ..

(not that I really understand all the math) a very simplistic analysis says that you would not be able to resolve a sine wave from discrete samples unless you had at least four (very well placed)

Did you ever try one, Albert? I’ve had several and I wouldn’t agree with spec compliance on that point, unless they’ve all been defective. I blamed my observation on Nyquist vs. 500 Msa/s.

The Catalog says "Maximum Single-Event Useful Storage Bandwidth 200 MHz". Albert

Hi Holger, Nice work, I'm always pleased to see new gadgets bridge the gap between the modern and the vintage. I invested effort into writing software that lets you connect the 7854 to the modern PC

Looks very nice Holger. For the user it's likely far more convenient than your GPIB interface for the DPO. Success, Albert

“Nyquist” applies to continuous sinewave-like waveforms only, not single shots. That’s why ‘scopes don’t show any reasonably usable waveforms even when complying, not even at