Getting Started 1
Keysight InfiniiVision DSOX1204A/G Oscilloscopes User's Guide 21
4. Entry knob The Entry knob is used to select items from menus and to change values. The function of the Entry
knob changes based upon the current menu and softkey selections.
Note that when the Entry knob symbol appears on a softkey, you can use the Entry knob, to
select values.
Often, rotating the Entry knob is enough to make a selection. Sometimes, you can push the Entry
knob to enable or disable a selection. Also, pushing the Entry knob can also make popup menus
disappear.
5. [Default Setup]
key
Press this key to restore the oscilloscope's default settings (details on "Recall the Default
Oscilloscope Setup" on page 16).
6. [Auto Scale]
key
When you press the [AutoScale] key, the oscilloscope will quickly determine which channels have
activity, and it will turn these channels on and scale them to display the input signals. See "Use
Autoscale" on page 17.
7. Horizontal and
Acquisition
controls
The Horizontal and Acquisition controls consist of:
• Horizontal scale knob — Turn the knob in the Horizontal section that is marked to
adjust the time/div setting. The symbols under the knob indicate that this control has the effect
of spreading out or zooming in on the waveform using the horizontal scale.
Push the horizontal scale knob to toggle between fine and coarse adjustment.
• Horizontal position knob — Turn the knob marked to pan through the waveform data
horizontally. You can see the captured waveform before the trigger (turn the knob clockwise) or
after the trigger (turn the knob counterclockwise). If you pan through the waveform when the
oscilloscope is stopped (not in Run mode) then you are looking at the waveform data from the last
acquisition taken.
•[Acquire] key — Press this key to open the Acquire menu where you can select the Normal, XY, and
Roll time modes, enable or disable Zoom, and select the trigger time reference point.
Also you can select the Normal, Peak Detect, Averaging, or High Resolution acquisition modes
and use segmented memory (see "Selecting the Acquisition Mode" on page 54).
• Zoom key — Press the zoom key to split the oscilloscope display into Normal and Zoom
sections without opening the Acquire menu.
For more information see "Horizontal Controls" on page 33.
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