Tektronix CSA7404B, Руководство пользователя

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Triggering
CSA7000B Series & TDS7000B Series Instruments User Manual
3- 87
Overview Control elements and resources To trigger on a runt pulse (Cont.)
To set mode
and holdoff
9. Mode and holdoff can be set for all standard trigger
types.
See To set holdoff on page 3--74 and To select the
the trigger mode on page 3--71 for mode and
holdoff setup. To learn more about trigger mode
and holdoff, see Trigger Modes on page 3--65 and
Trigger Holdoff on page 3--66.
When you select the type Width, the instrument will trigger on a pulse narrower
(or wider) than some specified range of time (defined by the upper limit and
lower limit). To set up for width triggering, do the following procedures.
Overview Trigger based on pulse width Control elements and resources
Select width
triggering
1. From the toolbar, touch Trig, select the A Event tab of
the Trigger control window, and touch Select.
2. Touch Width.
Select the
source
3. To specify which channel becomes the trigger source,
touch Source, and select the source from the list.
Select the
polarity
4. To specify the polarity of the pulse, touch Pos (positive)
or Neg (negative) from the window:
H
Pos looks at positive-going pulses.
H
Neg looks at negative-going pulses.
Trigger Based on
Pulse Width