Then It Calculates Top And Base - HP 54710A User's Reference Manual

Measurements

Then It Calculates Top and Base

Then It Calculates Top and Base
The next measurements made are the top and base of the waveform. These
measurements come directly from the histogram. The top 40 percent is
scanned for the top, and the bottom 40 percent of the histogram is scanned
for the base. The center portion of the histogram is not searched to prevent
a baseline value from being chosen as the top or base as shown in figure 13-5.
Figure 13–5
The middle 20 percent of the waveform is ignored
13–7