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Vishay Measurements Group
Interactive Guide
Technical Articles
Digital Signal Processing
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Skewing errors greater than 1 LSB of full scale are detectable and, as shown below, the measurable frequency range is increased moderately if the accompanying errors are acceptable. 
Maximum frequencies that can be sampled at
various skewing error levels.
Of course, all skewing errors can be virtually eliminated by using a digital data system, like System 6000, that features simultaneous sampling of all signal channels. In these systems, the maximum time difference between samples is typically in the nanosecond range, such that skewing errors for all measurable frequency ranges are undetectable. 
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