User`s guide

Channel-to-Channel Locktime Theory
This tool is an automated histogram process. The tool gathers time measurements to create many
histograms. Statistical information from these histograms is then plotted.
In this tool, the Skew between channels is the measurement being made. This measurement is then stepped
out from an arm signal. A histogram of time measurements is created of the first edge on CH1 to the first
edge on CH2 following the arm. The edges being measured are then incremented to create a histogram of
the
second edge on CH1 to the second edge on CH2 following the arm. See the 'measurement schedule'.
The arm is a periodic signal. For the histogram of skew from A1 to B1, one sample is made for each arm
pulse. This step ends when the number of samples is equal to the setting "Hits per Measure". Then the
edges are incremented to measure A2 to B2 and the histogram is made and so on until the edges
incremented equals the "Range".
The mean values from these histograms are plotted relative to the corresponding edge increment in the
"Time View". Additional views allow the Pk-pk or 1-sigma of these histograms to be plotted relative to the
edge increment.
The "Range" setting determines the maximum increment of edges. "Edges to measure" determines how
many of these edges will be measured within the "Range". Therefore, if the "Range" equals the "Edges to
measure" then all the skews are measured within that range. But if the "Edges to Measure" is less than the
"Range" not all edges will be measured. For example "Range" is set to 100. "Edges to measure" is set to 50.
Every other skew would be measured so the results would show A1 to B1, A3 to B3, A5 to B5 and so forth to
A99 to B99. The range value is met but only 50 distinct skews are measured.
© WAVECREST Corporation 2005 Section 4 - GigaView
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