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• When three channels or all four channels are enabled, the memory depths
available include Auto, 1 kpts, 10 kpts, 100 kpts, 1 Mpts, 10 Mpts, 25 Mpts, 50
Mpts, 100 Mpts (optional), and 125 Mpts (optional).
TIP
• In "Auto" mode, the oscilloscope selects the memory depth automatically according to
the current sample rate.
• When
Acquisition Mode
is set to "High Res", "Auto" is not available for the memory
depth setting.
• When
Acquisition Mode
is set to "Average", only 1 kpts, 10 kpts, 100 kpts, 1 Mpts, and 10
Mpts are available for the memory depth setting.
7.5 Horizontal Expansion Reference
This function allows you to set the position that the waveform on the display is
referenced to when it is horizontally expanded or compressed when the horizontal
time base is adjusted. In the Horizontal menu, click or tap the Expand drop-down
button to select the reference position. Available options include Center (default),
Left, Right, Trigger, and User.
• Center: when the horizontal time base is modified, the waveform will be
expanded or compressed horizontally relative to the center of the display.
• Left: when the horizontal time base is modified, the waveform will be expanded
or compressed horizontally relative to the leftmost position of the display.
• Right: when the horizontal time base is modified, the waveform will be
expanded or compressed horizontally relative to the rightmost position of the
display.
• Trigger: when the horizontal time base is modified, the waveform will be
expanded or compressed horizontally relative to the trigger point.
• User: when the horizontal time base is modified, the waveform displayed will be
expanded or compressed horizontally relative to the user-defined reference
position.
When you select "User", click or tap the User Expansion input field and set the
value with the displayed numeric keypad. Its range is from -500 to 500, and the
default is 0.
7.6 Roll Mode
The roll mode causes the waveform to move across the screen from right to left. It
allows you to view the acquired data without waiting for a complete acquisition. In
Horizontal menu, select "Auto" or "OFF" in Roll.
Acquisition System
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved.
DHO4000 User Guide
65
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