Using the Oscilloscope 2
Keysight Infiniium 90000A Series Oscilloscopes User’s Guide 39
• You can also use the controls in the horizontal toolbar to adjust the horizontal
scale. Mouse over or touch the horizontal scale field and use the resulting
controls to set a particular horizontal scale. You can click the Scale field to enter
an exact value, or click the “narrower” or “wider” buttons.
Adjusting the horizontal trigger position (delay)
• The horizontal position knob is the smaller of the two horizontal control knobs.
Turn it to move the waveform to the right or left.
Moving the waveform to the right shows more of the pre-trigger data (data
acquired before the trigger event). Moving the waveform to the left shows more
of the post-trigger data.
When you drag the desired waveform, the horizontal position will change for all
channels and functions on the display. Waveform memories will also move if
you check the Tie To Timebase box in the Waveform Memories dialog box.
• You can also use the controls in the horizontal toolbar to adjust the horizontal
position. Mouse over or touch the horizontal position field and use the resulting
controls to set a particular horizontal position (time relative to the trigger at the
highlighted horizontal reference point).
Magnifying a part of the waveform using Zoom
• To turn on zoom, press the [Zoom] key or click the Zoom button.
The waveform display area splits into two regions. The top one is the main
timebase. The bottom is the zoomed timebase, which represents an expansion
of the acquired waveform data. A section of the waveform in the main timebase
window is highlighted to indicate the part shown in the zoomed timebase
window.
The horizontal scale and horizontal position controls now change how the
waveform is shown in the zoomed timebase window. The horizontal scale will
change the amount of magnification, while the position will change the part of
the waveform in the main window that is shown in the zoomed window.
• Press the [Zoom] key or click the Zoom button again to turn off Zoom.
Setting the scale, position, and timebase reference point
You can use the Horizontal dialog box to set scale, position, and timebase
reference. You can also set up the zoomed timebase window.
• To access the Horizontal dialog box, click the in the horizontal toolbar, or
click Setup > Horizontal... from the menu bar.
• The Timebase Reference control is a slider from 0 to 100% of the screen. The
center of the screen is at 50%. The slider correlates to the solid orange triangle
at the bottom of the display area, showing you where the horizontal offset is on
the screen.
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