Tektronix CSA7404B, User Manual

Page: 164 / 438

Triggering
3- 96
CSA7000B Series & TDS7000B Series Instruments User Manual
Overview Control elements and resources Trigger on a pattern (Cont.)
To Trigger on a
pattern
2. From the toolbar, touch Trig, select the A Event tab of
the Trigger control window, and touch Select.
3. Touch Pattern.
To define
pattern inputs
4. To set the logic state for each of the input channels
(Ch1, Ch2, . . .), touch each Input Threshold, and select
either High (H), Low (L), or don’t care (X) from the
menu.
To set
thresholds
5. To set the logic threshold for each channel, select the
channel threshold, and use the multipurpose knobs,
keypad, or threshold presets to set each threshold.
To define the
logic
6. To choose the logic pattern type, you want applied to the
input channels, touch an available type from the Pattern
Type window. (See Table 3--5 on page 3--80 for
definitions of the logic functions for both pattern and
state triggers.)
To set trigger
when
7. To choose to trigger when the logic condition is met
(goes TRUE) or when the logic condition is not met
(goes FALSE), touch Trigger When Pattern, and select
False, Less Than, More Than, or True from the list.
The list items More Than and Less Than are used to
time qualify a pattern trigger. See the procedure
To
define a time qualified pattern trigger that follows for
instructions.