Filter
Top Products
9
How Can the Acquisition of Voltage and Current
Data be Controlled?
Two characteristics of the voltage and current
acquisition can be controlled: the sample rate,
and the beginning of acquisition relative to the
trigger. The ac power source/analyzer has a sample
rate of approximately 40 kHz (a sample every 25
microseconds) as the default setting. This means
it takes approximately 100 milliseconds for the
data buffers to fill with voltage and current data
points. The sample period can be programmed
from a minimum of 25 microseconds to a maxi-
mum of 250 microseconds (at 25-microsecond
increments).
The acquisition of voltage and current data can
also be initiated relative to the acquisition trigger,
thereby enabling the capture of pre-event and
post-event data. To capture pre-event or post-event
voltage and current data, the offset of data points
relative to the trigger is programmed. The range
of offset that can be programmed is from -4096 to
2xl0
9
points. If the offset is negative, the values at
the beginning of the data buffer represent samples
taken prior to the trigger. If the offset value is zero
(the default setting), all data is acquired directly
after the trigger. If the offset value is positive, the
acquisition of valid buffer data will be delayed
from the receipt of the trigger.
MEASure and FETCh Command Execution Diagram