HP 83480A - Determining Rising and Falling Edges

Waveform Measurements
The Waveform Measurement Process
Determining rising and falling edges
The nal analysis needed to make timing measurements is to dene the
transition points of the waveform through the threshold levels and to dene
the rising and falling edges. A rising edge is dened as a transition that
passes through the lower, middle, and upper threshold levels. A falling edge
is dened as a transition that passes through the upper, middle, and lower
threshold levels.For an edge to be present and dened, it must complete the
transition through all three threshold levels.
Once the transition points and edges are identied, the instrument next
calculates timing
measurements (rise
time,
fall
time
,
and
frequency).
Finally
,
it calculates
voltage measurements
that need
timing
information
(Vrms
cycle
and V
avg cycle)
as
shown
in
Figure
7-6
.
Figure 7-6.
Thresholds are used to determine edges.
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