Triggering on Waveforms
3–98
TDS 500D, TDS 600B, & TDS 700D User Manual
Data (Ch1) transition occurs
within 10 ns after the clock
violating hold time limit.
The oscilloscope recognizes the
violation and triggers at the clock edge.
Cursors measure the setup/hold
violation zone which equals setup
time + hold time (30 ns).
Figure 3–48: Triggering on a Setup/Hold Time Violation
In most cases, you will enter positive values for both setup and hold time.
Positive values set the oscilloscope to trigger if the data source is still settling
inside the setup time before the clock or if it switches inside the hold time after
the clock. You can skew this “setup/hold violation zone” that the setup and hold
times form by entering negative values. See Figure 3–44 on page 3–90.
To Set Mode and Holdoff. Mode and holdoff can be set for all standard trigger
types and classes. To set mode and holdoff, refer to To Set Mode & Holdoff on
page 3–85. To learn more about trigger mode and holdoff, see the descriptions
Trigger Modes and Trigger Holdoff on page 3–75.
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