Tektronix DPO3000 Series, Руководство пользователя

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Trigger Setup
Trigger Type Trigger Conditions
Runt Trigger on a pulse amplitude that crosses one threshold
but fails to cross a second threshold before recrossing the
fi rst. You can detect positive or negative (or either) runts, or
only those wider than, less than, greater than, equal to, or
not equal to a speci
fi ed width. Runt triggers are primarily
used on digital signals.
Logic Trigger when all channels transition to the speci fi ed state.
Use multipurpose knob a to select a channel. Push the
appropriate side-bezel button to set that channel’s state to
High (H) , Low (L) , or Don’t Care (X) .
Use the Clock side-bezel button to enable clocked (state)
triggering. You can have at most a single clock channel.
Push the
Clock Edge bottom bezel button to change the
polarity of the clock edge. Turn off clocked triggering and
return to unclocked (pattern) triggering by selecting the
clock channel and setting it to high, low, or don’t care.
For unclocked triggering, by default, triggering occurs when
the selected condition goes true. You can also select
triggering when the condition goes false, or time-quali
fi ed
triggering.
118 DPO3000 Series Oscilloscopes User Manual