116 Keysight InfiniiVision 2000 X-Series Oscilloscopes User's Guide8 Display Settings3 To erase the results of previous acquisitions from the display, press the ClearPersistence softkey.The oscilloscope will start to accumulate acquisitions again.4 To return the oscilloscope to the normal display mode, turn off persistence;then, press the Clear Persistence softkey.Turning off persistence does not clear the display. The display is cleared if youpress the Clear Display softkey or if you press the [AutoScale] key (which alsoturns off persistence).For another method of seeing worst-case extremes of varying waveforms, see“Glitch or Narrow Pulse Capture" on page 162.To clear the display1 Press [Display] > Clear Display.You can also configure the [Quick Action] key to clear the display. See “Configuringthe [Quick Action] Key" on page 262.To select the grid typeWhen the Video trigger type is selected (see “Video Trigger" on page 135), and thevertical scaling of at least one displayed channel is 140 mV/div, the Grid softkeylets you select from these grid types:• Full — the normal oscilloscope grid.• mV — shows vertical grids, labeled on the left, from -0.3 V to 0.8 V.• IRE — (Institute of Radio Engineers) shows vertical grids in IRE units, labeled onthe left, from -40 to 100 IRE. The 0.35 V and 0.7 V levels from the mV grid arealso shown and labeled at the right. When the IRE grid is selected, cursor valuesare also shown in IRE units. (Cursor values via the remote interface are not inIRE units.)The mV and IRE grid values are accurate (and match Y cursor values) when thevertical scaling is 140 mV/division and the vertical offset is 245 mV.To select the grid type:
