User`s guide

Histogram Theory of Operation
The Histogram is the most basic information that the instrument and GigaView software will provide. The
Hits per Measure determines how many time measurements will be in each histogram. Time values are
binned and displayed on the x-axis (horizontal) while the y-axis (vertical) represents the number of hits that
occurred in that bin. Basic statistical information can then be derived from the histogram: mean value, peak-
to-peak, 1-sigma (1 standard deviation), maximum and minimum values.
The user can also see immediately if the distribution is multi-modal and if there is a jitter source present.
Because the time samples are randomly made, the histogram represents a probability density function. So if
the histogram of periods were bimodal with each mode having roughly equal samples, we can infer that the
probability of a short and long period are equal. This would mean that short and long periods are
alternating. For more information, see the in-depth description.
Section 4 - GigaView © WAVECREST Corporation 2005
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