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offset and the horizontal scale and position to present the zoomed section of
the waveforms.
See "To zoom on a section of the waveform" on page 3-49.
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.
Ground Reference Indicators A small symbol is shown at the right side
of the waveform display area for each waveform that is on, including
channels, waveform memories, and functions. This symbol represents the
ground reference point for each channel; it moves when you change the
vertical offset. You can also drag this symbol up and down using the mouse
or touch screen; doing so automatically changes the vertical offset for that
waveform.
Menu Control and Menus
The display looks like figure 3-13 and figure 3-14, including a menu bar,
measurement toolbar (if enabled), and graphical controls for vertical,
horizontal, trigger, and acquisition.
You can use the menu bar for most oscilloscope configuration functions.
Context-sensitive menus, which pop up to provide a selection of commands
within particular regions of the user interface, are available in the following
regions:
• Memory bar
• Waveform display area
• Measurement toolbar
• Horizontal and acquisition controls
You display a context-sensitive menu by clicking the right mouse button with
the pointer in one of these regions. For more information on context-sensitive
menus, see "To select a command from a context-sensitive menu" on page 3-33.
Vertical Settings and Controls The top of the waveform display area
includes the vertical settings and controls. All channels are shown with the
corresponding vertical scaling settings in volts per division. Each has a
checkbox allowing you to turn that channel on or off, and a set of controls
allowing you to change the vertical scaling. Clicking directly on the vertical
scaling value displays a pop-up numeric keypad allowing you to set a precise
vertical scale.
Using the Oscilloscope
Graphical User Interface
3-25
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