Field or control
Description
High-Low Method
Sets the method to calculate the waveform High and Low values, which is then used to calculate the
High, Mid, and Low reference levels.
Auto is the default method, and automatically determines the best High-Low method to use. Most
commonly sets the method to Histogram Mode.
Min-Max Uses the minimum and maximum values in the waveform record to determine the high and
low amplitude. Useful on a waveform with low noise and free from excessive overshoot.
Histogram Mode uses histogram analysis to calculate the most common values above and below the
waveform midpoint. High is set to the common high value, and Low is set to the common low value.
Note: All measurements that you add to the Results bar will use the new High-Low Method
values for taking measurements.
High Ref, Mid Ref 1, Mid Ref 2,
Low Ref, Vg Mid Ref
Sets the reference levels as specified percentages of the High and Low waveform measurement or as
absolute values.
To set custom reference values, tap a setting field, and use the Multipurpose Knob to set the different
% (relative) or absolute values.
High Ref and Low Ref references are used to calculate rise and fall times. The default High reference
is 90% and Low reference is 10%.
Mid Ref 1 and Mid Ref 2 references are primarily used for measurements between edges such as
pulse widths. The default level is 50%.
Vg Mid Ref sets the mid reference when the Gate Voltage is set to something other than None.
This control is only available with the 3MDOPWR power measurement option Switching Loss
measurement.
Gating
Sets the gate type used to take measurements.
Off: Measurements are taken across the entire record.
Screen: Measurements are taken on the portion of the waveform shown on the display. When zoom is
on, the ‘display’ on which to measure is the zoom window.
Cursors: Measurements are taken on the portion of the waveform between the cursors. When
Cursors is selected, use the multipurpose knobs to select the portion of the waveform to measure.
Table continued…
Menus and dialog boxes
3 Series Mixed Domain Oscilloscope Printable Help
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