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reference point is being defined). Because the statistical approach ignores short-term aberrations
(overshoot or ringing), the histogram method is the best setting for examining pulses.
Gating Control Window
Access this control window from the Measure menu Gating command, or from the Measurement Setup
control window.
Overview
Use the Gating control window to limit the measurement area
of the waveform to the region bounded by the vertical bar
cursors or to the left and right edges of a Zoom window.
To Use
To define the gating area with the vertical bar cursors, click
Cursor, and then click either Indep or Tracking to select
the Track Mode. These buttons are only displayed when you
click Cursor.
To define the gating area from a Zoom area, click one of the
four Zoom buttons.
To turn off measurement gating, click the Off button.
Click Setup to return to the Measurement Setup control window.
Behavior
Normally the instrument takes measurements over the entire waveform record. Gating lets you
limit measurements to a specific portion of the waveform. You can limit gating to the region
bounded by the vertical bar cursors or to the left and right edges of a Zoom area.
When you click Zoom (1-4) the Zoom window appears in the lower half of the display.
Measurements are taken within the boundaries of the Zoom area. You can only take measurements
on one Zoom area at a time.
When you click Cursor, measurements are taken within the boundaries of the vertical cursors. Use
the multipurpose knobs to move the cursors.
When you use vertical cursors to control the gating, you can also specify the cursor mode. Use the
independent cursor mode to move the cursors one at a time with the multipurpose knobs. Use the
tracking mode to have the cursors track one another; moving Cursor 1 automatically moves Cursor
2 in tandem.
Tips for using measurement gating:
 Click, hold, and drag across the part of the graticule that you want to measure. After you
define the measurement area, select Measurement Gating from the shortcut menu to place
gating cursors around the measurement area.
 Use the same click, hold, and drag method to turn measurement gating off; just select
Measurement Gating Off in the shortcut menu.
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