132 Agilent InfiniiVision 3000 X-Series Oscilloscopes User's Guide
8 Display Settings
3 To erase the results of previous acquisitions from the display, press the
Clear Persistence 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 you press the Clear Display softkey or if you press the
[AutoScale] key (which also turns off persistence).
For another method of seeing worst- case extremes of varying waveforms,
see "Glitch or Narrow Pulse Capture" on page 193.
To clear the display
1 Press [Display] > Clear Display.
You can also configure the [Quick Action] key to clear the display. See
"Configuring the [Quick Action] Key" on page 298.
To select the grid type
When the Video trigger type is selected (see "Video Trigger" on page 161),
and the vertical scaling of at least one displayed channel is 140 mV/div,
the Grid softkey lets 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 on the left, from -40 to 100 IRE. The 0.35 V and 0.7 V levels
from the mV grid are also shown and labeled at the right. When the IRE
grid is selected, cursor values are also shown in IRE units. (Cursor
values via the remote interface are not in IRE units.)
The mV and IRE grid values are accurate (and match Y cursor values)
when the vertical scaling is 140 mV/division and the vertical offset is
245 mV.
To select the grid type:
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