HP 1660CS, User Manual

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SPA State Overview menu with fields called out
Specifying Low and High values The range of the X axis is
determined by the Low value and High value fields (item 2 in figure
above). To change the X axis range, select the Low value or High value
fields and enter new limits. The range you specified will then be divided
among the 256 available buckets along the X axis (unless the range is
less than 256 or the histogram frame is truncated due to bucket range
round-off).
For example, you might set the low and high values so that the range is 1100.
1100 divided by 256 is 4.29. This will be rounded up to 5, and each bucket
will have a range of 5. Since 1100 divided by 5 is 220, the histogram frame
will be truncated at the right because the X axis will have only 220 of the 256
buckets.
The default high and low values represent the full range of the label you
chose. Before changing these values, you may want to run the acquisition and
acquire some data to view activity over the entire range of the label. You can
then zoom in on areas of interest.
You can enter low and high values in binary, octal, decimal, hexadecimal,
ASCII, or symbol.
6
3
7
5
1
2
4
System Performance Analysis (SPA) Software
Using State Overview, State Histogram, and Time Interval
8-22