User`s guide

This tool provides results very similar to those obtained from an oscilloscope: The histogram of a
particular rising/falling edge referenced to a bit-clock (see figure below). Because of the sampling
method, the instrument and
GigaView software are able to display separately the rising and falling data
edge histograms.
The underlying technique for this measurement is simply a propagation delay or skew measurement from
the bit clock on one channel to the data rising and falling edges on another channel. It is important to
note that using this tool has the same disadvantages as the oscilloscope. For instance, jitter is measured
relative to the bit clock, therefore, jitter on the clock may or may not be noticed. There is also no way to
determine Data Dependent Jitter (DDJ).
Refer to the "Histogram" and "Measurement Technique" Quick Reference Guides.
Section 4 - GigaView © WAVECREST Corporation 2005
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