Tektronix 6 series, Printable Help

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Set measurement reference levels
Use this procedure to set measurement reference levels.
Reference levels are set in the Reference Levels panel of the Measurements configuration menu. See Measurement
configuration menu overview on page 164.
Prerequisite: To set measurement reference levels you must be taking a measurement. See Add a measurement on page 94.
1. Double-tap a Measurement badge.
The Measurement configuration menu is displayed.
2. Tap the Reference Levels panel.
3. Select either Global (default) or Local:
■ Global causes changes in this panel to be updated in all other measurements that also have Global selected in this
panel.
When switching from Global to Local:
■ If a specific measurement has not been set to Local before then no changes are made to any of the values. You
can update the parameters.
■ If a specific measurement has been set to Local before, then changed back to Global and then again switched to
Local, the last used Local values are shown.
■ Local causes changes in this panel to only effect this measurement. When switching from Local to Global, all fields will
update to the current Global parameters.
4. Tap Set Levels In and select either % or Absolute.
■ % sets the High, Mid, and Low reference levels as percentages of the calculated Top and Base signal levels. Tap the
Levels 10% - 90%, 20% - 80%, or Custom button to select the type of percent value to set.
■ 10% - 90% sets the Low, Mid and High Ref values to 10%, 50% and 90% respectively for both rising and falling
edges.
■ 20% - 80% sets the Low, Mid and High Ref values to 20%, 50% and 80% respectively for both rising and falling
edges.
■ Custom opens the Rising and Falling Edge numeric entry fields to set High, Mid and Low Ref levels to different
values for the rising and falling edges of a waveform. Tap the Rising Edge and Falling Edge High, Mid, or Low
fields and set the level using the assigned multipurpose knob. Or double-tap the field and use the virtual keypad to
enter a value.
■
Absolute sets the High, Mid, and Low reference levels to specific signal levels. Tap the Levels Same or Unique
buttons to select the type of absolute value to set.
■
Same sets the High, Mid, and Low reference for both rising and falling edges of a signal to the specified values.
Tap the Threshold High, Mid, or Low field and set the threshold using a multipurpose knob. Or double-tap the
field and use the virtual keypad to enter a value.
■ Unique opens the Rising and Falling Edge numeric entry fields to set High, Mid and Low Ref levels to different
values for the rising and falling edges of a waveform. Tap the Rising Edge and Falling Edge High, Mid, or Low
fields and set the level using the assigned multipurpose knob. Or double-tap the field and use the virtual keypad to
enter a value.
5. Tap the Base Top Method drop down tab and select the method from the list. This setting is only available when using the
% level setting.
6. Touch Hysteresis and use the assigned multipurpose knob to set the value.
7. Tap anywhere outside the Measurement configuration menu to close it.
Customizing measurements
136 MSO54, MSO56, MSO58, MSO58LP, MSO64 Help