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• When three channels or all four channels are enabled (only available for four-

channel models), the memory depths available include Auto, 1 kpts, 10 kpts, 100

kpts, 1 Mpts, 10 Mpts, and 25 Mpts (optional).

TIP

In "Auto" mode, the oscilloscope selects the memory depth automatically according to the

current sample rate.

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

Expand User 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 XY Mode

By default, this series oscilloscope uses the YT mode for waveform display window. In

YT mode, Y-axis indicates the Voltage and X-axis indicates the Time. Besides, it also

supports the XY display in which both X-axis and Y-axis indicate voltage. The XY

mode converts the oscilloscope from a volts-versus-time display to a volts-versus-

volts display using two input channels.

Enable the XY Mode

You can enable the XY display mode in the following ways:

Acquisition System

HDO1000 User Guide

Rigol HDO1000 Series User Manual

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