Keysight Infiniium DSOS054A, Руководство пользователя

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36 Keysight Infiniium S-Series Oscilloscopes User’s Guide
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Using the Oscilloscope
• Moving the waveform to the right shows more of the pre-trigger data (data
acquired before the trigger event). Moving it to the left shows more post-trigger
data.
• When you drag a waveform, the horizontal position will change for all channels
and functions on the display. Waveform memories will also move if you select
the Tie to Timebase box in the Waveform Memories dialog box.
• To adjust the horizontal position using the controls in the horizontal toolbar,
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 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 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.
• To turn off zoom, press or click again.
Setting the scale, position, and timebase reference point
To set scale, position, and timebase reference, use the Horizontal dialog box or set
up the zoomed timebase window.
To access the Horizontal dialog box, click the
in the horizontal toolbar, or
choose Setup > Horizontal... from the main menu.
The Timebase Reference range is from 0 to 100% of the screen. The center of the
screen is at 50%. The slider correlates to the hollow orange triangle at the bottom
of the display area, showing where the horizontal offset is on the screen.
NOTE
Avoid Overdriving Vertical Input Amplifiers
When zooming on a waveform with the oscilloscope running, be careful to keep the signal
within the screen vertically to avoid overdriving the vertical input amplifiers. Overdriving
causes waveform distortion and erroneous measurement results.