Products > Test Equipment
Can't decide on an oscilloscope
nctnico:
--- Quote from: EC8010 on August 08, 2024, 03:51:48 pm ---Cheap 'scopes are very poor on this. A very simple (but revealing) test is to put the 'scope into XY mode and feed two channels with stereo music. What you should see (and would on an analogue 'scope) is a pulsing ball of wool having a continuous thread. Poor 'scopes will show breaks in the wool and maybe even noticeable updates to the picture.
--- End quote ---
For real world measurements the speed of XY mode isn't relevant anyway. XY mode is useful for looking at small, slow phase variations between two repetitive signals.
EC8010:
It's not the speed of XY mode itself, it's that to do XY mode the 'scope has to trigger, record, and process waveforms, so it's a very quick way to compare 'scopes side by side.
tautech:
--- Quote from: EC8010 on August 08, 2024, 06:29:06 pm ---It's not the speed of XY mode itself, it's that to do XY mode the 'scope has to trigger, record, and process waveforms, so it's a very quick way to compare 'scopes side by side.
--- End quote ---
:-DD
There's a lot more to the modern DSO than just the signal path to the display.
Intuitive UI and menus
Feature set and the most important of all, the triggering capability.
2N3055:
--- Quote from: EC8010 on August 08, 2024, 06:29:06 pm ---It's not the speed of XY mode itself, it's that to do XY mode the 'scope has to trigger, record, and process waveforms, so it's a very quick way to compare 'scopes side by side.
--- End quote ---
No it is not.
Fungus:
--- Quote from: EC8010 on August 08, 2024, 03:51:48 pm ---Absolutely. Most good 'scopes are 8-9 ENOB because that's the right amount. I suspect a £500 'scope will be a little less.
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Not these new 12-bit Rigols/Siglents.
The noise levels and resolution of this new generation is impressive.
FWIW: From what I've seen in EEVBLOG threads I don't think there's much difference between the two. Certainly not enough to base a purchase decision on.
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