LeCroy Digital Oscilloscopes, Руководство пользователя

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Note: The Glitch SMART
Trigger is the trigger selected
by default. It will be used here,
but pressing the menu button
for “SETUP SMART
TRIGGER” will show the other
types available. Both the Glitch
and Interval Triggers include
minimum and maximum timing
limits, normally used to trigger
on waveforms falling within
those limits. The Exclusion
Trigger uses these maximum
and minimum limits to exclude
triggering on certain
waveforms. This allows the
scope to avoid the deadtime
inherent in triggering on ‘normal’
signals. While in Exclusion
Trigger mode, the scope
remains ready to trigger on
abnormally shaped signals.
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The screen will then display:
The next step and its various stages set up the Glitch SMART Trigger
to eliminate nominal pulses having a width of 50 ns (one division).
Thus only those waveforms that do not have pulse widths of 50 ns will
trigger the oscilloscope.
Press the to select “ ” from the “trigger on” menu, and
Trace 2 as source trigger, adjusting the trigger level to one
division from the top of the pulse.
Press the to select “
3RV
” from the “at end of” menu (in
this case the pulses are positive).
And the to select “
2Q
” from the “width <” menu.
Then turn the upper menu to set the “width <” value to
47.5 ns.