Triggering
CSA7000B Series & TDS7000B Series Instruments User Manual
3-85
When you select the type Runt, the instrument will trigger on a short pulse that
crosses one threshold but fails to cross a second threshold before recrossing the
first. To set up for runt triggering, do the following procedures.
Overview To trigger on a runt pulse Control elements and resources
Select runt
triggering
1. From the toolbar, touch Trig, select the A Event tab of
the Trigger control window, and touch Select.
2. Touch Runt.
Select the
source
3. To specify which channel becomes the pulse trigger
source, touch Source, and select the source from the
list.
The source selected becomes the trigger source for
Glitch, Runt, Width, and Transition.
Select the
polarity
4. To specify the direction of the runt pulse, touch Polarity,
and select Pos (positive), Neg (negative) or Either from
the window.
H Pos looks at positive-going pulses.
H Neg looks at negative-going pulses.
H Either looks at both positive and negative pulses.
Set to trigger
when
To determine how wide a runt pulse the instrument will trigger
on:
5. Touch Runt and select from the list:
H Occurs triggers on all runt pulses regardless of
width.
H Wider triggers only on runt pulses that exceed the
width you set. Enter the width using the multipur-
pose knob or keypad.
6. To specify the minimum width of the runt pulse, touch
Width, and set the value using the multipurpose knob or
keypad.
To Trigger on a Runt Pulse
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