Tektronix, Inc. P6240, User Manual

Page: 237 / 321

Triggering on a Sequence
TLS 216 User Manual
3–155
AND (HHHH) of Start Pattern becomes TRUE
AND (LLLL) of End Pattern becomes TRUE
Triggering occurs 2 ns later
Time Limit at Minimum
Figure 3-70: Triggering on a Sequence: > Time, Minimum Time Qualification
To Trigger on a Time-Limit Qualified Sequence
To trigger on a sequence of two TRUE patterns where the second (end) pattern
becomes TRUE (relative to the first pattern) at a time that ends before or extends
beyond a time limit you specify, do the following steps.
1. Define the start and end pattern levels, logic functions, thresholds, and the
trigger mode and holdoff using the methods outlined in To Trigger on a
Sequence on page 3–150.
2. Press TRIGGER MENU
➞
Type (main)
➞
Sequence (pop-up)
➞
Time
Qual (main)
➞
Limit (pop-up).
3. Press Sequence Trigger When (main)
➞
Time (side).
4. Use the general purpose knob or the keypad to set the time limit from when
the start pattern becomes TRUE in the side menu.
5. Press < Time, > Time, or Time Out (side). See Table 3–10 on page 3–148
to select the time qualifier that is appropriate to your application. Also, read
the example that follows.
Figure 3-71 shows an example of Time Out qualification. In this case, the
Boolean requirements for the three-input start and end patterns are defined by the
AND logic chosen. The inputs shown (Ch 1 – Ch 3) must match their defined