Owon SDS series User Manual page 52

OFF, 1second, 2second, 5second and Infinity. When the "Infinity" option is set for
Persist time, the measuring points will be stored till the controlling value is changed
(see Figure 5-34). By pressing the F2 button, the persistence will be cleared.
XY Format
This format is only applicable to Channel 1 and Channel 2. After the XY display
format is selected, Channel 1 is displayed in the horizontal axis and Channel 2 in the
vertical axis; the oscilloscope is set in the un-triggered sample mode: the data are
displayed as bright spots.
The operations of all control knobs are as follows:
The Vertical VOLTS/DIV and the VERTICAL POSITION knobs of Channel 1
are used to set the horizontal scale and position.
The Vertical VOLTS/DIV and the VERTICAL POSITION knobs of Channel 2
are used to set the vertical scale and position continuously.
The following functions can not work in the XY Format:
Reference or digital wave form
Cursor
Time base control
Trigger control
FFT
5.Advanced User Guidebook
Figure 5-34 Infinite Persistence Display
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