Waveform Measurements
The Waveform Measurement Process
Measurements of eye diagrams use a color graded database.Top and base
values are determined from the peak regions of the color graded database.If
the measurement algorithm cannot locate these peak regions, top and base
default to the absolute maximum and minimum.
Once the top and base measurements are complete, Vtop, Vbase, and Vamp
measurements can be made.
Locating
crossing
points
When
eye
diagrams
are
measured,
the
crossing
points
are
determined. Data
within
the
top
and
base
levels
are
used
to
construct
histograms
from which
approximate
crossing
points
can
be
determined.
An
iterative
process
is
used
to
precisely
locate
the
crossing
point.
7-9