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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

Hi agree , he should be here Brian (UK)

Chuck has been wrongly banned! I hope for his return!

I tapped a razor blade between the two halves at the glue joint and it came apart easily. Maybe it was just a fluke, will know when I try another one. Chuck -- See Early TV at: www.myvintagetv.com

Hi everybody! I'm currently in the process of developing a USB interface for the Tektronix DPO (aka P7001). And I'm very happy to tell that my first prototype is now working. I've added some images to

thank You Mark, My bad about +15V, is not regulated rail, but unregulated +15V.., shows 22V. Waveform 161 indicate, thats ok, (21-21.8V).. Others tips i will check soon ..

I'm still quite a way from a successful wind and the only transformers for which I have winding data are the 545B/546/547, 549 and 556. Watch this space! Morris

TekWIki says that the 2440 is 300MHz (analog bandwidth) with 500 MSa/s (digital sampling rate). It doesn't say what the single shot bandwidth is, but it has to be less than 250 MHz just based on

Hello Morris, I’d also like some “restoration” bits of that unit is (unfortunately) going to get scrapped. I’d be happy to contribute to the postage if the chosen bits could be bulk shipped.

Which 500 series scope? I need HV transformers for my Curve Tracers.