Keysight DAQ970A Guia Del Usuario página 253

Level triggering
Level triggering allows you to trigger measurements at some defined point on the input signal, such as when the
signal crosses zero volts or when it reaches the midpoint of its positive or negative peak amplitude. For example, this
graphic shows sampling beginning as the input signal crosses 0V with a positive slope:
About level trigger
Level triggering is available for these measurement functions:
– DC voltage and DC current
– Strain
– 2-wire and 4-wire resistance with offset compensation off, and low power off
– Temperature (RTD sensor only)
The level trigger is edge-sensitive. That is, the instrument must detect a change in the quantity being measured from
one side of the level setting to the other side (direction controlled by Slope setting). For example, if the Slope is
positive, then the quantity being measured must first reach a value below the set level before a trigger event can be
detected. Level trigger performance is not uniform. Its accuracy, latency, and sensitivity are dependent on other
DMM features.
Keysight DAQ970A/DAQ973A User's Guide
4 Measurement Tutorials
253