Explain the difference between a waveform point and a sample point.
2007-10-04 11:01:46 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Most sampling 'scopes now-a-days have lots of memory. The waveform is sampled and stored. When the amount of samples in the memory exceeds the number of pixels (or analog dot resolution) on the display screen, the waveform in the memory must be downsampled for display. In this case the waveform points are not the same as the sample points.
In another type of sampling, repetitive waveforms are sampled multiple times with a small time offset between sample sets. The result is an effective sample rate that is much higher (orders of magnitude higher sometimes) than the base sample rate. In this case what is displayed on the screen is a composite of several (repetitve) waveforms, so the sample points are not the same as the waveform display points.
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2007-10-04 12:44:32 · answer #1 · answered by tlbs101 7 · 0⤊ 0⤋
Digital scopes sample the signal at regular intervals, at least twice the frequency of the signal being sampled. There would be a sample point where the sample and hold takes place.
A waveform point is the point on the input wavepoint where the sample takes place.
2007-10-04 18:13:05 · answer #2 · answered by Warren W- a Mormon engineer 6 · 1⤊ 0⤋
dont know, both the same.
2007-10-04 18:12:39 · answer #3 · answered by HI 2 · 0⤊ 1⤋