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Display Control
Enables to view glitches that change relatively slowly or glitches with lower
occurrence probability. The persistence time can be set to 100 ms, 200 ms, 500 ms,
1 s, 2 s, 5 s, or 10 s.
3. Infinite
In this mode, the oscilloscope displays the waveform newly acquired without
clearing the waveforms acquired formerly. The waveforms acquired formerly will
be displayed in relatively low-brightness color and the newly acquired waveforms
will be displayed in normal brightness and color. Infinite persistence can be used
to measure noise and jitter and to capture incidental events.
20.3
To Set the Waveform Intensity
Press Intensity, then rotate the multifunction knob
pop-up numeric keypad to set the waveform intensity. Note that in the non-menu
operation mode, you can also rotate the multifunction knob
waveform intensity of the channel. The default is 50%, and the range available is from
1% to 100%.
20.4
To Set the Screen Grid
Press Grid, and rotate the multifunction knob
down the knob to select it. You can also press Grid continuously or enable the touch
screen to select it. You can select FULL, HALF, NONE, or IRE.
•
FULL: turns the background grid and coordinate on.
•
HALF: turns the background grid off.
•
NONE: turns the background grid and coordinate off.
•
IRE: only available for testing the video signal (i.g. the trigger type is set to
"Video" trigger, and the vertical scale is set to 140 mV).
When "IRE" is selected, the screen displays the vertical graticule in IRE and marks
it at the left side of the screen. Its range is from -40 IRE to +100 IRE. Meanwhile,
0.35 V and 0.7 V levels are displayed at the right side of the screen, as shown in
the following figure.
298
at a small step value or use the
to set the grid type and then press
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to adjust the
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