Statistics; Choosing Statistics Types; Excluding Samples - HP 64700 Series User Manual

Statistics

8-26 Timing: Using the Analyzer
The Timing Analysis Softkey Interface can perform statistical
analyses on repetitive executions traces. Two types of analysis are
available: interval statistics and occurrence statistics. For both
types of analysis, you can calculate the minimum and maximum
values, or the mean and standard deviations.

Choosing Statistics Types

Interval Statistics Interval statistics are based on the time
interval between mark_x and mark_o samples. The interval
between the mark_x and mark_o points is calculated and includes
as a statistical sample.
Occurrence Statistics Occurrence statistics are based on the
number of multiple occurrence marks (abcd) assigned during post
processing of each trace measurement. The number of marks
between the mark_x and mark_o points are totaled included as a
statistical sample.
The type of statistical analysis can be specified on either the timing
diagram or trace list screen. The commands
display timing_diagram
indicate time_interval_x_o
mean_and_standard_deviation
specifies interval statistics calculating the mean and standard
deviation for the samples collected.
You can disable the calculation of statistic by specifying a statistics
type without a calculation, as in
indicate number_of_marks_x_o
which will only display the number of marks between mark_x and
mark_o.

Excluding Samples

The "statistics" post process command allows you to exclude
samples from the statistical calculations. The default condition is
to always include traces in the calculation. You exclude traces
when they have a interval from mark_x to mark_o of greater than
(or less than) a specified amount of time, or when the number of
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