Agilent Technologies 6800 manual MEASure and FETCh Command Execution Diagram

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 2xl09 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

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