22
Voltage
Amplitude
The difference between top and base of an
eye.
Eye Height
Eye Height is the vertical opening of the eye
measured as the difference between the -3
sigma value of the high samples within the
NRZ window and the +3 sigma values of the
low samples within the NRZ window.
Eye Width
The time between the latest possible
occurrences of one eye crossing to the
earliest possible occurrence of the next
crossing.
Total Peak-to-
Peak Jitter
Jitter is defined as a measure of the short-
term variations of the significant instances of
a digital signal from its ideal position on the
time axis. In other words, ideally, an edge
should always land at the same position on
the time axis. In the real world, the edge is
sometimes a little early, sometimes a little
late. This is jitter. In this revision the Jitter
value is Peak to Peak.
Crossing
Percentage
The amplitude of the crossing level relative to
the low and high levels. (The value of the
crossing percentage is displayed in the
bottom of the screen.)
Jitter
The jitter measurement allows to calculate
the total jitter, the jitter peak-to-peak and
the jitter rms in ps.
