Tektronix CSA7404B, Руководство пользователя

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Triggering
CSA7000B Series & TDS7000B Series Instruments User Manual
3- 89
When you select the type Transition Time (slew rate), the instrument will trigger
on a pulse edge that traverses between an upper and lower threshold faster or
slower than a transition time you specify. To set up for transition time triggering,
do the following procedures.
Overview To trigger based on transition time Control elements and resources
Select transition
triggering
1. From the toolbar, touch Trig, and select the A Event tab
of the Trigger control window.
2. Touch Transition.
Select the
source
3. To specify which channel becomes the trigger source,
touch Source, and select the source from the list.
Select slope 4. To specify the direction of the pulse edge, touch Slope
and select Pos (positive), Neg (negative) or Either from
the window:
H
Pos monitors the transition time (slew rate) of the
positive-going edges of pulses. The edge must first
cross the lower threshold and then cross the upper
threshold.
H
Neg monitors the transition time (slew rate) of the
negative-going edges of pulses. The edge must
first cross the upper threshold and then cross the
lower threshold.
H
Either monitors positive- and negative-going edges
of pulses. The edge may first cross either threshold
and then cross the other.
To Trigger Based
on Transition Time