Measurement Computing WavePort rev.3.0 - Manual (Page 69)

WavePort User’s Manual 09-29-00 WaveView 6-17
Pulse Trigger
Pulse Trigger 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 between
±5 V and a
pulse width 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: When used as a maximum, the pulse width setting can capture signal pulses. As a minimum, it is
useful for ignoring pulses.