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| True analog scopes |
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| tggzzz:
--- Quote from: nfmax on December 18, 2022, 04:01:14 pm --- --- Quote from: tggzzz on December 18, 2022, 02:29:39 pm ---~1984 I remember listening on a high end (not audiophool!) audio system with a friend to http://arsnovaclassic.blogspot.com/2012/09/michala-petri-blockflotenkonzerte.html on both CD and vinyl. We could tell a slight difference, but not which was which, nor which was better. --- End quote --- Ooh yes, one of my first ever CD purchases! Still sounds great on the ESL63’s… --- End quote --- It did sound good, didn't it! I use the past tense only since my wetware is now a limitation :( |
| tautech:
--- Quote from: tggzzz on December 18, 2022, 07:43:47 pm --- --- Quote from: tautech on December 18, 2022, 07:01:05 pm ---A very relevant and undeniable point relating to this topic is not one A brand manufacturer still produces a CRO, why is that ? --- End quote --- Are you confusing the output display technology (cro/lcd) with the input front end technology (analogue/digitising/sampling)? --- End quote --- ::) All oscilloscopes use analogue inputs. The modern varieties all use LCD of one sort or another and some variety of sampling. Your point is ? :-// |
| tggzzz:
--- Quote from: james_s on December 18, 2022, 07:50:39 pm --- --- Quote from: tggzzz on December 18, 2022, 07:43:47 pm --- --- Quote from: tautech on December 18, 2022, 07:01:05 pm ---A very relevant and undeniable point relating to this topic is not one A brand manufacturer still produces a CRO, why is that ? --- End quote --- Are you confusing the output display technology (cro/lcd) with the input front end technology (analogue/digitising/sampling)? If so that's a silly mistake. --- End quote --- Does it matter? As far as I know, no A brand is producing any sort of CRT based scope, whether analog or digital. And as I've said before, I am skeptical that any manufacture is still making any type of CRT based scope, unless they are assembling them as needed from components that are stocked. I'm not aware of any factory still producing new CRTs of any type. --- End quote --- Stupid arguments matter, and should be exposed for what they are. I expect there are still CRT scopes and other instruments being made. They are an ever diminishing and not very interesting niche. |
| tautech:
--- Quote from: Wallace Gasiewicz on December 18, 2022, 12:06:06 am ---Also I am unable to get a usable display of a Transistor Curve Tracer, which is a snap on my analog scopes. --- End quote --- You'll find all the guidance you need here: https://www.eevblog.com/forum/projects/dso-awg-based-curve-tracer/ And for the PM you sent: https://www.eevblog.com/forum/testgear/two-tone-test-with-scope-and-sa/ |
| tggzzz:
--- Quote from: tautech on December 18, 2022, 08:38:24 pm --- --- Quote from: tggzzz on December 18, 2022, 07:43:47 pm --- --- Quote from: tautech on December 18, 2022, 07:01:05 pm ---A very relevant and undeniable point relating to this topic is not one A brand manufacturer still produces a CRO, why is that ? --- End quote --- Are you confusing the output display technology (cro/lcd) with the input front end technology (analogue/digitising/sampling)? --- End quote --- ::) All oscilloscopes use analogue inputs. The modern varieties all use LCD of one sort or another and some variety of sampling. Your point is ? :-// --- End quote --- Some sampling scopes [1] have the sampler directly connected to the input via resistors, inductors and capacitors. The only active amplifying components in the signal path are after the sampler. That can give vital advantages, since there is zero overload recovery time - because when the sampling gate isn't open the input is effectively disconnected. For scopes that don't have those characteristics, you may need to get the same characteristics by building your own precision high speed sampling front end; see Jim Williams' justly famous AN47 for details. Whether or not that sampled input is digitised and displayed on a CRT or LCD is obviously a separate design decision. [1] two examples are the Tektronix 1S1 and 1S2 plugins; I know of one other and I expect there are more. EDIT: add s1, s2 s3, 7s11, 7s12 |
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