Oscilloscope Utility Settings 18
InfiniiVision 7000B Series Oscilloscopes User’s Guide 383
Setting Oscilloscope Preferences
The User Preferences Menu (under [Utility] > Options > Preferences) lets you
specify preferences like the vertical expansion reference, antialiasing,
screen saver, autoscale options, transparent backgrounds, or loading the
default label library.
To choose "expand about" center or ground
When you change a channel's volts/division setting, the waveform display
can be set to expand (or compress) about the signal ground level or the
center of the display.
To set the waveform expansion reference point:
1 Press [Utility] > Options > Preferences > Expand and select:
• Ground — The displayed waveform will expand about the position of
the channel's ground. This is the default setting.
The ground level of the signal is identified by the position of the
ground level ( ) icon at the far- left side of the display.
The ground level will not move when you adjust the vertical
sensitivity (volts/division) control.
If the ground level is off screen, the waveform will expand about the
top or bottom edge of the screen based on where the ground is off
screen.
• Center — The displayed waveform will expand about the center of the
display.
To disable/enable antialiasing
At slower sweep speeds, the sample rate is reduced and a proprietary
display algorithm is used to minimize the likelihood of aliasing.
By default, Antialiasing is enabled. You should leave Antialiasing enabled
unless there is a specific reason to switch it off.
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