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| tautech:
Love to stop and chat but too darn busy with a Xmas rush selling these infernal modern DSO's....higher priced ones too ! |
| vk6zgo:
--- Quote from: tggzzz on December 22, 2022, 09:21:02 pm --- --- Quote from: TimFox on December 22, 2022, 09:16:59 pm ---An especially useful feature of DSOs is the ability to display the waveform in a single sweep before the triggering event. --- End quote --- Agreed, that's something which the unlamented analogue storage scopes couldn't do. It is less compelling with repetitive waveforms, of course. --- End quote --- Analog 'scopes with delay lines can display the waveform in a recurrent waveform before the trigger event, although it is seldom essential. |
| vk6zgo:
--- Quote from: baldurn on December 22, 2022, 11:23:10 pm --- --- Quote from: alm on December 22, 2022, 10:56:57 pm ---Any sweep function generator with any half-way decent scope with a second channel or external trigger input can do it: --- End quote --- I can tell you that trick is nothing like the real thing. --- End quote --- When I learnt about "Bode plots", it was done by plotting transfer functions on graph paper. This would give unrealistically sharp corner frequencies. They were normally done for amplitude and phase response. When we measured amplitude-v-frequency response of real devices, we used a RF or audio sweeper & an oscilloscope, or an "all in one" sweeper like a Polyskop SWOB. We called it what it was----a "amplitude/frequency response test". Back the day, VNAs were "rare as hen's teeth" so we didn't normally have the occasion to do "phase/frequency" testing. Do the common modern DSOs perform both of these types of test? |
| TimFox:
--- Quote from: vk6zgo on December 23, 2022, 02:26:54 am --- --- Quote from: tggzzz on December 22, 2022, 09:21:02 pm --- --- Quote from: TimFox on December 22, 2022, 09:16:59 pm ---An especially useful feature of DSOs is the ability to display the waveform in a single sweep before the triggering event. --- End quote --- Agreed, that's something which the unlamented analogue storage scopes couldn't do. It is less compelling with repetitive waveforms, of course. --- End quote --- Analog 'scopes with delay lines can display the waveform in a recurrent waveform before the trigger event, although it is seldom essential. --- End quote --- Analog scopes with delay lines allowed the time at the trigger event to be displayed, but very, very little before it. |
| BillyO:
--- Quote from: tautech on December 23, 2022, 02:24:22 am ---Love to stop and chat but too darn busy with a Xmas rush selling these infernal modern DSO's....higher priced ones too ! --- End quote --- That's all there is to sell .. that's what gets sold. But, as said before, I love my DSOs. They will always be my go-to for serious work. No argument. But I'm not tossing my CRO anytime soon. I'm willing to admit that my reflexes are better habituated to a (Tektronix) CRO, but that's what I learned on and spent most of my career as an ET with. That said, the advantages of a modern DSO are seductive for sure. And if I have something more serious to do, that's where I go. However, if the moment calls for a reflexive quick peek at an event or waveform I can best leverage a 40YO Tek to get the job done. Both technologies have a place in my life. I can also do the timing and adjust the points, synchronize the carbs and prep the plugs on my '74 RD350. Many here would be at a total loss and never be able to enjoy the feel of riding an untamed, raw twin cylinder 2-stoke bike of epic reputation. I pity those that cannot appreciate where they, or their world, came from. Let me lay out a question. My Tek 465 has outlived it's era by ~30Y+ but still provides purpose and usefulness. Can I expect my "improved" SDS2104XP to do the same? My 12YO UNI-T UT2102CEL has outlived it's usefulness and it's 1/4 the age of the 465. :-// |
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