Telecommunications Techniques Corporation interceptor 147, Reference Manual, Page: 267 / 280

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INTERCEPTOR 147 2 Mbit/s and Data Analyzer
Understanding Histograms
5. Results (Bar Graph)
The vertical bars on the Histogram Print indicate
how many of the specified events occurred at the
indicated times.
6. Mode Change Indicator(s)
When a mode change occurs, the Mode Change
Indicator appears as an “M” to show the time.
For purposes of Histogram Prints, a mode change
is defined as any change in test instrument
configuration.
7. Relative Time Indicators (X-Axis)
The X axis indicates the time, relative to the start
time of the histogram. The time indicators are
automatically evenly spread along the X axis,
ranging from 00:00 to the time set up in the
AUXILIARY setup category’s Len item. To
correlate the time with real time, add the relative
time indicated on the X axis to the real time.
8. Information About the Histogram
The following information about the histogram
is provided:
Start of Acquisition — Time when the
histogram buffer was turned on.
Start of Print (DD/HH:MM) — Time indicating
the start of the Histogram Print, relative to the
time the histogram buffer was turned on. This
value is equal to the value you set in the
AUXILIARY category’s Start item.
Duration of Print (DD/HH:MM) — Time that
the Histogram Print covers. This value is
equal to the value you set in the AUXILIARY
setup category’s Len item.