29 Dec '16, 6am

Get a Signal's Details

There's a difference between a digitizer's number of bits and how well it shows signal details. Oscilloscopes give you a window into the signals traveling through connectors, cables, PCB traces, and components. How well you see the oscilloscope's trace is partly a function of your eyes and partly a function of the instrument's effective number of bits (ENOB). The higher the ENOB, the better the resolution, and the clearer the picture will be. Note that I said "effective number of bits," as opposed to "number of bits." There's a reason for that. Chris Loberg of Tektronix explains the difference between simply having more bits and having more effective bits in his Test & Measurement World article, Aren't more bits better ? Loberg gives an analogy using photographs, showing the difference between a high-resolution image and a low-resolution image. The differences are obvious,...

Full article: http://www.eetimes.com/author.asp?section_id=36&doc_id=13...

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