User`s guide

Operating the Power System 4
Series N6700 User’s Guide 81
Time interval values from 10.24 up to 20.48 microseconds are
rounded to the nearest 10.24-microsecond increment. Values above
20.48 microseconds are rounded to the nearest 20.48-microsecond
increment when the resolution is set to RES20. Values above 20.48
microseconds are rounded to the nearest 40.96-microsecond
increment when the resolution is set to RES40.
You can change the time interval resolution as follows:
Front Panel: SCPI Command:
Not Available To set the resolution to 20 microseconds:
SENS:SWE:TINT:RES RES20, (@1)
To set the resolution to 40 microseconds:
SENS:SWE:TINT:RES RES40, (@1)
Specify a Window Function
Windowing is a signal conditioning process that reduces the error in
average measurements made in the presence of periodic signals and
noise. Two window functions are available: Rectangular and
Hanning. At power-on, the measurement window is Rectangular.
The Rectangular window calculates average measurements without
any signal conditioning. However, in the presence of periodic signals
such AC line ripple, a Rectangular window can introduce errors
when calculating average measurements. This can occur when a non-
integral number of cycles of data has been acquired due to the last
partial cycle of acquired data.
One way of dealing with AC line ripple is to use a Hanning window.
The Hanning window applies a cos
4
weighting function to the data
when calculating average measurements. This attenuates the AC
noise in the measurement window. The best attenuation is achieved
when at least three or more waveform cycles are in the measurement.
Front Panel:
SCPI Command:
Select Measure\Window.
Then select either Rectangular or
Hanning and press Select.
To set the sense window to Hanning
for output 1 use:
SENS:WIND HANN, (@1)
Send the Measurement Command
The following commands trigger and return measurement data.:
Front Panel: SCPI Command:
Select the Meter key. Front panel
meters can only measure average
voltage and current.
To measure average voltage & current:
MEAS:VOLT?(@1)
MEAS:CURR?(@1)
To measure RMS voltage & current:
MEAS:VOLT:ACDC?(@1)
MEAS:CURR:ACDC?(@1)