Thresholds Are The Next Values Calculated - HP 54710A User's Reference Manual

Thresholds Are the Next Values Calculated

Once the top and base are defined, threshold levels used for timing
measurements are calculated. These thresholds may be the IEEE values of
10, 50, and 90 percent, or values in percentages or volts that you set. These
thresholds are called upper, middle, and lower thresholds in the
measurement menu.
These thresholds are used by all timing measurements as they are needed to
determine the presence of a rising or falling edge. In addition, the thresholds
are used by various measurements. For example, rise time is measured from
the lower threshold to the upper threshold of a rising edge. Period and
frequency measurements use the middle threshold as shown in figure 13-6.
See also
Chapter 8, "Define Measure Menu," for information on manually setting the
thresholds.
Figure 13–6
The oscilloscope calculates the 10, 50, and 90 percent thresholds
Thresholds Are the Next Values Calculated
Measurements
13–9