ab initio
500+ Head-Fier
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- May 1, 2013
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Hi all,
I found this application note from Agilent discussing some of the issues involved with digitizing analog signals with bandwidth-limited instruments. Included in the discussion are the effects of timing errors (e.g., jitter *gasp*) on the interpretation of the digitized waveform.
I found this while I was shopping for a scope and was trying to figure out whether or not it is worth the $$ for something like a Agilent DSO1102B with 1 or 2 ADC's vs the larger feature set of something like a Rigol DS1104Z. My understanding is that the value scopes like the cheaper rigols, hanteks, etc..., use something like 10 cheap/slow interleaved ADC's rather than one or two fast ones. If you don't know why I'm talking about interleaved ADCs, read the article!
This is a good read once you get past Agilent vs Tek bias. There is discussion and example measurements illustrating several types of distortion introduced by timing errors.
I apologize if this has been linked to before---I vaguely remember following a link from head-fi to an app note a year or two ago---but a quick forum search finds nothing.
Cheers!
I found this application note from Agilent discussing some of the issues involved with digitizing analog signals with bandwidth-limited instruments. Included in the discussion are the effects of timing errors (e.g., jitter *gasp*) on the interpretation of the digitized waveform.
I found this while I was shopping for a scope and was trying to figure out whether or not it is worth the $$ for something like a Agilent DSO1102B with 1 or 2 ADC's vs the larger feature set of something like a Rigol DS1104Z. My understanding is that the value scopes like the cheaper rigols, hanteks, etc..., use something like 10 cheap/slow interleaved ADC's rather than one or two fast ones. If you don't know why I'm talking about interleaved ADCs, read the article!
This is a good read once you get past Agilent vs Tek bias. There is discussion and example measurements illustrating several types of distortion introduced by timing errors.
I apologize if this has been linked to before---I vaguely remember following a link from head-fi to an app note a year or two ago---but a quick forum search finds nothing.
Cheers!
