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Old 19th October 2010, 08:05 AM   #1
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Default Oscilloscope THD performance

If oscilloscopes are one of the main tools that analyze electrical signals as they give a full representation of the signal amplitude variation over time why most scopes Iíve seen (if not all) donít have THD specification on their data sheet?
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Old 19th October 2010, 10:54 AM   #2
SY is offline SY  United States
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Remember, a scope gives a visual representation. Your eyes are not particularly sensitive to HD- it takes several percent before it becomes clearly visible.
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Old 19th October 2010, 12:06 PM   #3
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Now I know there is no need to exert effort looking for THD spec on any scope data sheet. Thanks Stuart.
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Old 19th October 2010, 01:56 PM   #4
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This kind of specification exists for oscilloscopes, but it isn't given in a THD format, rather as linearity, which is obviously more meaningful:
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Old 21st October 2010, 12:10 PM   #5
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So what scope brand & model is the data sheet? If linearity specification is more meaningful how come popular brands like Agilent, LeCroy, & Tektronix (mentioned in alphabetical order) don't specify them on their data sheet?
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Old 21st October 2010, 01:54 PM   #6
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This spec is extracted from the TEK 2445 manual:

http://web.mit.edu/jhawk/www/tek2445.pdf

But I've seen this kind of spec (maybe with a slightly different formulation) on other instruments and manufacturers.
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