Products > Test Equipment
Opinion on Tektronix 2246 vs 2445
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tggzzz:

--- Quote from: bdunham7 on April 22, 2023, 03:25:15 am ---
--- Quote from: tggzzz on April 21, 2023, 10:27:25 pm ---When I found some later Tek scopes (e.g. TDS340) couldn't do that, I was more than a little irritated! My recollectiom, possibly faulty, is that it is possible on 22x5 scopes, but is nowhere near as convenient as on the 4x5 and 24x5 scopes.

--- End quote ---

22x5 scopes is not a good way to categorize.  The 2215 and 2235 have a full dual timebase implementation, you set the A and B sweep rates, dial in the delay and there you are.  They both even have B-triggers.  The only advantage the 24x5 scopes had AFAIK is the dual-B-sweep.  The 2225, OTOH, just has a lame magnifier setup and not any sort of dual timebase.

You can pick on the poor TDS340, but full-on DSOs really manage things differently with zoom.  With only 1000 samples, there's not much you can do.

--- End quote ---

The 1000 samples was a common problem, especially where a CCD was used as the sampling mechanism for later slow digitisation. It made digitising scopes pretty dire for general purpose use, but was tolerable for the USP of capturing a single-shot event. The stunning advances in ADC performance have greatly improved the usability of modern digitising scopes.

I've only played with one 22x5 (a 2245), so I bow to your judgement about the others. Nonetheless, I found the delayed B-sweep functional, but the ergonomics were poor compared with the 24[46]5 scopes.
m k:
I remember that my 2215A was triggering pretty well, better than 465, but it was new.
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