Measurement Computing WaveView - Manual (Page 28)

WaveView, pg. 26 03-05-02 WaveView
Pulse Trigger
WaveBook/512A, /516, and /516A each support Pulse Trigger. This allows the use of a high-bandwidth
input for triggering, and the correlation of lower-speed waveforms with the occurrence of a high-speed
pulse. You can set a pulse amplitude to a value between +5 V and -5 V, and set a pulse width to a value
in the range of 10 ns to10
µs.
Pulse Trigger Selected
This option allows you to trigger on analog level “pulses” on either the Channel 1 input or the Pulse Trigger
input. This trigger type is similar to the Channel 1 Analog trigger but places an additional time-based
condition on the signal. Depending on whether the pulse width is set as a minimum or a maximum, the
signal either must or must not cross the threshold again within the given amount of time.
The red horizontal line (Threshold) and blue vertical lines (defining maximum width) will vary according to
the parameter settings. You can specify either one or two thresholds for the level and width settings. The
number of labels matches the number of thresholds and the placement follows the polarity.
•
For positive polarity, the text is “Rise Above... Stay Below.”
•
For negative polarity, the text is “Fall Below and Stay Above.”
Note: In the triggering section (see figure, above) you can select “Maximum” width to capture
signal pulses. The “Minimum” width selection is useful when you desire to ignore pulses.