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| True analog scopes |
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| 2N3055:
--- Quote from: james_s on December 14, 2022, 09:06:50 am --- --- Quote from: 2N3055 on December 13, 2022, 08:56:18 pm ---I said truth, only thing CRT scope does better is X-Y, but difference is only visible with scope art. I have no use for scope art, but i don't judge. If someone likes it, good for them. --- End quote --- I use my analog scope when working on vector arcade game boards. No DSO that I've tried could even display a recognizable image. --- End quote --- That is because you use it as a analog video X-Y(-Z) monitor. Which would need 5-10Mhz video bandwidth. And is same as scope art, basically.. As I said, all of that is very niche... |
| robert.rozee:
i can see a few places where a CRT/analog oscilloscope is a preferable solution: 1. where there are tight cost and resource constraints. ie, poor people who can only afford a 2nd hand CRT scope, perhaps living in a place where new equipment is not available. think of the slums in places like india. 2. in locations where radiation hardening is necessary. for instance, off-planet. there may be such situations where semiconductors can not be depended upon, and fully-valved equipment needs to be used. 3. in situations where the displayed trace is safety-critical, and a digital solution introduces the possibility of failure modes that are not acceptable. for instance, displaying the sine wave output from a generation plant, where a DSO could fail with a frozen display. basically a CRT/analog oscilloscope provides an extremely simply display where any failure within the instrument is guaranteed to remove the trace on the screen; a DSO can lock up with a 'good' image on the display even if there is a 'bad' input signal. the above are all extreme examples, but non-the-less could still exist in the real world. 4. it is also important that we preserve "old technology" so that if some global mishap knocks back society, we can pick up at a level of technology that is still achievable within any 'new world order' without having to go back to the stone age. for instance, if a massive solar flare knocked out all of our existing semiconductor electronics infrastructure, it would be nice for human society to be able to pick up at the level of 1920's valve technology and rebuild from there. cheers, rob :-) |
| JPortici:
--- Quote from: tautech on December 14, 2022, 09:19:23 am --- --- Quote from: james_s on December 14, 2022, 09:06:50 am --- --- Quote from: 2N3055 on December 13, 2022, 08:56:18 pm ---I said truth, only thing CRT scope does better is X-Y, but difference is only visible with scope art. I have no use for scope art, but i don't judge. If someone likes it, good for them. --- End quote --- I use my analog scope when working on vector arcade game boards. No DSO that I've tried could even display a recognizable image. --- End quote --- Screenshot please. :-DD --- End quote --- I believe him, vector displays are tricky beasts and i can't name a digital scope that has the Z input (i know there are a couple but i can't remember which they are) |
| Sherlock Holmes:
--- Quote from: robert.rozee on December 14, 2022, 11:30:38 am ---i can see a few places where a CRT/analog oscilloscope is a preferable solution: 1. where there are tight cost and resource constraints. ie, poor people who can only afford a 2nd hand CRT scope, perhaps living in a place where new equipment is not available. think of the slums in places like india. 2. in locations where radiation hardening is necessary. for instance, off-planet. there may be such situations where semiconductors can not be depended upon, and fully-valved equipment needs to be used. 3. in situations where the displayed trace is safety-critical, and a digital solution introduces the possibility of failure modes that are not acceptable. for instance, displaying the sine wave output from a generation plant, where a DSO could fail with a frozen display. basically a CRT/analog oscilloscope provides an extremely simply display where any failure within the instrument is guaranteed to remove the trace on the screen; a DSO can lock up with a 'good' image on the display even if there is a 'bad' input signal. the above are all extreme examples, but non-the-less could still exist in the real world. 4. it is also important that we preserve "old technology" so that if some global mishap knocks back society, we can pick up at a level of technology that is still achievable within any 'new world order' without having to go back to the stone age. for instance, if a massive solar flare knocked out all of our existing semiconductor electronics infrastructure, it would be nice for human society to be able to pick up at the level of 1920's valve technology and rebuild from there. cheers, rob :-) --- End quote --- Actually that's a very good point, availability. The very presence of software, influences reliability. My Siglent will lock up sometimes due to bugs and must be repowered, often losing several precisely set parameters, no analog scope will, can, fall victim to that. |
| xrunner:
--- Quote from: Sherlock Holmes on December 14, 2022, 12:18:07 pm ---My Siglent will lock up sometimes due to bugs and must be repowered, often losing several precisely set parameters, no analog scope will, can, fall victim to that. --- End quote --- If you said so earlier I missed it, but what model Siglent are you referring to? |
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