Finally, Rising And Falling Edges Are Determined - HP 54710A User's Reference Manual

Measurements

Finally, Rising and Falling Edges are Determined

Finally, Rising and Falling Edges are Determined
The final analysis needed to make timing measurements is to define the
transition points of the waveform through the threshold levels and to define
the rising and falling edges. A rising edge is defined as a transition that
passes through the lower, middle, and upper threshold levels. A falling edge
is defined as a transition that passes through the upper, middle, and lower
threshold levels. For an edge to be present and defined, it must complete the
transition through all three threshold levels.
Once the transition points and edges are identified, the instrument next
calculates timing measurements (rise time, fall time, and frequency). Finally,
it calculates voltage measurements that need timing information (Vrms cycle
and Vavg cycle) as shown in figure 13-7.
Figure 13–7
Thresholds are used to determine edges
13–10