HP 8712C User Manual page 141

To Use Marker Flatness
The marker flatness search function measures a user-defined segment of the
measurement trace and calculates the following:
The analyzer calculates flatness by drawing a straight line between the
markers. A maximum vertical deviation from this line is computed for each
measurement point. Flatness is the magnitude difference of the maximum
and minimum calculated deviations from the straight line.
Limit testing may be performed on the flatness parameter. See "To Use
Marker Limit Functions,' later in this chapter for information.
1. On measurement channel 1 press [MARKER) and set markers 1 and 2
3. Figure 4-13 shows a deEned trace segment. Notice the marker readout in
to define the beginning and end of the trace segment that you want to
measure. (When using measurement channel 2, use markers 3 and 4 to
define the trace segment.)
the upper right corner of the display.
Using Instrument Functions
Using Markers
4-23