Products > Test Equipment
True analog scopes
MrAl:
--- Quote from: tautech on December 26, 2022, 08:02:25 pm ---Something I don't miss at all with analogue scopes....all the mental arithmetic just to use the scope vs a DSO that when set correctly excludes all that BS and instead lets you focus on the DUT measurement instead.
Pinched from another thread as a fine example:
Apparently using a 100x probe.
:horse:
--- End quote ---
Yes that's a good point the digital scopes can measure things right away.
I remember years ago trying to measure the rise, slope, and fall times of switching waveforms in high power converters so i could estimate the switching losses. It took about 15 minutes to get right and the calculation had to be done on a calculator or computer.
If the scope could measure rise and fall times that would help. Mine does not have that function though but i see some of the upper echelon scopes have that feature.
baldurn:
--- Quote from: MrAl on December 26, 2022, 09:08:59 pm ---I remember years ago trying to measure the rise, slope, and fall times of switching waveforms in high power converters so i could estimate the switching losses. It took about 15 minutes to get right and the calculation had to be done on a calculator or computer.
If the scope could measure rise and fall times that would help. Mine does not have that function though but i see some of the upper echelon scopes have that feature.
--- End quote ---
Does not require upper echelon scope. Just a newer scope. See attached screenshot of what my humble little entry level scope can do.
tggzzz:
--- Quote from: MrAl on December 26, 2022, 09:08:59 pm ---I remember years ago trying to measure the rise, slope, and fall times of switching waveforms in high power converters so i could estimate the switching losses. It took about 15 minutes to get right and the calculation had to be done on a calculator or computer.
--- End quote ---
Taking 15mins to work out a rise/slopes/fall times seems long. How long did you take to work out a peak-peak voltage?
OTOH, if it was such an awkward waveform or triggering, what leads you to believe a general purpose scope would have made the same choices?
I can understand that setting up the experiment and transcribing measurements into a very slow computer might have taken 15 mins.
tggzzz:
--- Quote from: baldurn on December 26, 2022, 09:22:45 pm ---
--- Quote from: MrAl on December 26, 2022, 09:08:59 pm ---I remember years ago trying to measure the rise, slope, and fall times of switching waveforms in high power converters so i could estimate the switching losses. It took about 15 minutes to get right and the calculation had to be done on a calculator or computer.
If the scope could measure rise and fall times that would help. Mine does not have that function though but i see some of the upper echelon scopes have that feature.
--- End quote ---
Does not require upper echelon scope. Just a newer scope. See attached screenshot of what my humble little entry level scope can do.
--- End quote ---
I would have thought that if traceability and reproducibility was required, then there would be reluctance to rely on a complex black box calculation.
Spreadsheets (and computer programs) often contain errors, but they can be challenged, examined and corrected in a way that firmware cannot.
baldurn:
--- Quote from: tggzzz on December 26, 2022, 09:28:51 pm ---
I would have thought that if traceability and reproducibility was required, then there would be reluctance to rely on a complex black box calculation.
Spreadsheets (and computer programs) often contain errors, but they can be challenged, examined and corrected in a way that firmware cannot.
--- End quote ---
If you enable the statistics function to gather data for more than just one random screenshot, there simply is no alternative?
If it is just for one random screenshot, just include that screenshot. Anyone can reproduce the calculation, albeit probably not as precise.
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