Agilent Technologies N6700 Synchronizing Digitizer Measurements, Retrieve Measurement Array Data

4 Operating the Power System

To select a window function, use:

Front Panel:	SCPI Command:
Select Measure\Window.	To set the sense window to Hanning
Then select either Rectangular or	for output 1 use:
Hanning and press Select.	SENS:WIND HANN, (@1)

Retrieve Measurement Array Data

Array queries return all values in the voltage and current measurement buffer. No averaging is applied, only raw data is returned from the buffer. The following commands initiate and trigger a measurement and return the measurement array:

Front Panel:	SCPI Command:
Not Available	MEAS:ARR:VOLT?(@1:4)
	MEAS:ARR:CURR?(@1:4)

Once a measurement finishes, you may wish to retrieve the array data without initiating a new measurement. Use FETCh queries to return the array data from the last measurement. Fetch queries do not alter the data in the measurement buffer. The commands are:

Front Panel:	SCPI Command:
Not Available	FETC:ARR:VOLT?(@1:4)
	FETC:ARR:CURR?(@1:4)

If a FETCh query is sent before the measurement is started or before it is finished, the response will be delayed until the measurement trigger occurs and the acquisition completes. This may tie up the computer if the measurement trigger does not occur immediately.

Synchronizing Digitizer Measurements

Use the measurement trigger system to synchronize the acquisition of measurements with a Bus, Transient, or an external trigger. Then use FETCh commands to return voltage or current information from the acquired data. Briefly, to make a triggered measurement:

1.Select the measurement function to trigger.

2.Select the trigger source.

3.Initiate the trigger system and generate a trigger.

4.Fetch the triggered measurements.

Select the Measurement Function to Trigger

Some models have two measurement converters, which allow simultaneous voltage and current measurements (Refer to Chapter 1, “Model Differences”). If a power model has only one converter and a triggered measurement is initiated, the parameter that it measures (either voltage or current) must be specified.

72 Series N6700 User’s Guide