Tektronix, Inc. P6240, User Manual

Page: 68 / 321

Triggering
TLS 216 User Manual
2–17
Slope and Threshold
The slope control determines whether the logic scope finds the trigger point on
the rising or the falling edge of a signal. (See Figure 2-3.)
You set trigger slope by selecting Slope in the Main Trigger menu and then
selecting from the rising or falling slope icons in the side menu that appears.
The threshold control determines where on that edge the trigger point occurs.
(See Figure 2-3.)
Positive-Going Edge Negative-Going Edge
Trigger Slope Can be Positive or Negative
Trigger Threshold Can
be Adjusted Vertically
Figure 2-3: Slope and Level Controls Help Define the Trigger
The logic scope lets you set the main trigger level with the trigger THRESHOLD
knob (pulse and edge triggers only).
Delayed Trigger
As mentioned earlier in this section, there is also a delayed trigger system that
provides all the functions of the main trigger. When using the delayed time base,
you can also delay the acquisition of a waveform for a user-specified time or a
user-specified number of delayed trigger events (or both) after a main trigger
event.
To Find More Information
See Triggering After Delay, on page 3–121, to learn about taking acquisition that
are delayed by time or events from the main trigger event.
See Trigger on Edges, on page 3–127, to learn how to trigger on the edge of a
input signal.
See Triggering on Patterns, on page 3–131, to learn how to trigger on an input
pattern of logic levels you define.