Agilent Technologies HP 1660E Series User Manual page 393

System Performance Analysis (SPA) Software
System Performance Analysis Software
Using Auto-range. To quickly set up all 8 time interval ranges, select
the Auto-range field. Enter the minimum time and maximum time for
all 8 ranges combined. Then, when you select Log Scale or Linear
Scale, all 8 ranges will be scaled accordingly between the Minimum and
Maximum times. See the figure on the previous page for the Auto-
range pop-up. Common boundaries of adjacent ranges are not
considered overlapped. Values that fall on the common boundary will
be included in the highest range.
A fast way to set up the Time Interval display is to define your Start
and End events and select Run using the default ranges. Select
Repetitive Run mode. After accumulating data for a while, press Stop.
Then select Auto-range and enter the Min time and Max time display
statistics in the Auto-range Minimum time and Maximum time fields.
When you select Log Scale or Linear Scale, the ranges will be defined
automatically.
Interpreting the histogram display. As the analyzer samples the
data, it searches for Start/End event pairs. One event pair is considered
one sample. The time value for each event pair is compared to each
defined time interval range. The range's count is incremented if the
time value falls within that range.
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