Time interval values can range from 5.12 microseconds to 40,000 seconds for both voltage and
current measurements. Values above 5.12 microseconds are rounded to the nearest 5.12
microsecond increment. Values above 10.24 microseconds are rounded to the nearest 10.24
microsecond increment. Values above 20.48 microseconds are rounded to the nearest 20.48
microsecond increment.
Note that Keysight RP7900 models also support the NPLC (number of power line cycles) command to
configure measurement tint and points as previously discussed. The NPLC command automatically
increases the number of points to maintain the shortest possible time interval. If the maximum number
of points for that time interval is reached, it increases the time interval.
Measurement Triggering
l Capture pre-trigger data, if desired
l Select the trigger source
l Initiate the acquisition system
l Trigger the measurement
l Fetch the measurement
l Multiple trigger events per measurement
Use the acquisition trigger system to synchronize the digitized measurements with a trigger signal
from a number of trigger sources. Then use FETCh commands to return voltage or current information
from the acquired data.
The following figure illustrates the measurement acquisition process. This process applies to both
measurement triggers and external data logging. For an overview of the trigger system, refer to
Trigger Overview.
Keysight RP7900 Series Operating and Service Guide 149
4 Using the Regenerative Power System
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