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| Choosing an oscilloscope |
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| 0culus:
--- Quote from: Fungus on October 13, 2020, 10:11:00 am --- --- Quote from: 0culus on October 13, 2020, 03:04:41 am ---I really don't get this almost cult-like belief around here that beginners are to be coddled and spoonfed and protected from–God forbid–having to learn to fix old gear. --- End quote --- Some people want to get other things done apart from fixing their test gear. --- Quote from: 0culus on October 13, 2020, 03:04:41 am ---it will serve many more decades in hobbyist service if fixed and cared for. Long after any hard drives and/or flash memory in a modern scope you might no longer be able to get firmware for have stopped working, effectively turning it into a door stop. --- End quote --- But modern 'scopes can do more and they fit inside modern apartments. If you grew up with that old gear then I understand that there's a certain fondness for it. Those old 'scopes emit a reassuring smell as they heat up, etc., but a youngster won't have that nostalgia. --- End quote --- But I didn't grow up with old gear, and I still have a nostalgia for well made equipment that was built to last. And I use mine on the daily whilst also being fully prepared for troubleshooting if needed. |
| george.b:
--- Quote from: BravoV on October 13, 2020, 02:50:57 pm --- --- Quote from: george.b on October 13, 2020, 04:13:49 am ---That's pretty brutal. What's the story there? --- End quote --- LOL >:D yeah, it was bought many years ago from Israeli's seller that sell T&M equipments that looked like they're ran over by tank in war zone. :palm: I was lucky on the timing, that the seller was going to close their shop put everything on big sale, and offered me these gems for a good bargain. --- End quote --- Ahh, I remember that one, I think. From eBay, right? He had some stuff in atrocious conditions alright. Didn't know they had closed up shop. |
| SilverSolder:
--- Quote from: 0culus on October 13, 2020, 03:27:15 pm --- --- Quote from: David Hess on October 13, 2020, 08:36:35 am --- --- Quote from: 0culus on October 12, 2020, 11:31:43 pm ---CROs, due to the exact relationship between the crt trace and the input, have a level of tactile-ness that DSOs can't match. --- End quote --- I disagree; there is nothing which prevents a DSO from responding to user controls with a latency of one display frame, which is fast enough to be visually indistinguishable, except poor design. --- End quote --- My point still stands, however, because the only DSO I've used where that is the case are MegaZoom models from HPAK. Everything else has enough latency between twiddling the rotary encoders and seeing the update on the screen that it is quite jarring. --- End quote --- That's easy to fix - Only use HPAK scopes! :D |
| David Hess:
--- Quote from: 0culus on October 13, 2020, 03:27:15 pm --- --- Quote from: David Hess on October 13, 2020, 08:36:35 am --- --- Quote from: 0culus on October 12, 2020, 11:31:43 pm ---CROs, due to the exact relationship between the crt trace and the input, have a level of tactile-ness that DSOs can't match. --- End quote --- I disagree; there is nothing which prevents a DSO from responding to user controls with a latency of one display frame, which is fast enough to be visually indistinguishable, except poor design. --- End quote --- My point still stands, however, because the only DSO I've used where that is the case are MegaZoom models from HPAK. Everything else has enough latency between twiddling the rotary encoders and seeing the update on the screen that it is quite jarring. --- End quote --- It is a design choice of how the controls interact with the waveform acquisition and display process. For instance on old and slow Tektronix DSOs like the 2232, the analog position control works like an analog oscilloscope and updates instantly like an analog oscilloscope, but is also digitized and the software uses the result to update the previously displayed waveform which will not be updated until the next sweep. Tektronix knew user responsiveness was a problem and designed to reduce latency. There is zero reason for user input to not be processed before the next display frame, other than not caring. |
| Neurosurg:
I have a big pleasure working on RTO200 which I bring from work (Physics Institiute) to home, asking for something a bit powerful than MDO3054 I have. Recived a big suprise. I'm working at Phisics Institiute at the University, as a science aparature electrionics, reparing and improving e.g. electron microscopes, ionisation vaccuometers etc. and creating new stuff driectlly to sophisticated reasearch set, unable to buy all of the World. Before I have a little experience with R&S stuff, using mainly Tek, Agilent/Leysight, little bit LeCroy, Rigols, Siglents etc. For now. The R&S scope I found at Our Departament, at magazin, in box. It was HMO1102 unusage ouf of warranty with 1 bad pixel. Story ends in the way I was told "If I wanna I can get it for free"/ Firstly I planned to sell it on ebay. But one day interesting push me to open box, and connect this little scope to mains. The impression was more then i expected. Little, dead silence cause it's with no fan inside, working fast, very responivly. Old Vintage component ttester plus pattern gen. sounds great. Possibility to programable enchanced the resolution from 8 stright to the doubile giving 16bits where you really noticed this change not like in Rigol or Siglent, pusching buton cchange the value but on screen no singhts of change. Semi-automated FFT setting algoritm, just set time domain, nr of points, window and Arythmetic mode: Refresh, Average _+ set number of this - beauty reduced noise, or envelope. Is ti possible to add color grade to spectrum. Minus, for changing the time domain you must exit FFT, in FFT time enconder just only adjust of spectrum span. Materials using to create it on huge level, my HMO version was the last made fron 0 to the end in EU. Sa When I need a scope for project from work I choose by blind and rembering the grest work on HMO1102, I ask for some from R&S, actually available was RTO200. Today colluage from work are delivered me it, because I'm post amputatnio from oncology reasons with troubles with wound to closed. So worke from home. Today i only playing with RTO2000, with huge impression. Have you have some from R&S but more then RTC1002 or RTB2004? For private? :) |
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