FETCh:FFTRansform:{MAGNitude | PHASe}? [{FLAT | HANNing}, [<first_pt>, [<length>]]]
Performs post-processing calculation on the specified range of readings and returns FFT magnitude/phase for
single channel DMM digitizing.
The minimum data points to perform the post-processing calculation is 256 data points. For valid post
processed measurement, please ensure data captured is at least 1 cycle.
The <length> will be round down to the lower 2
n
number, if the number enter is not 2
n
.
This SCPI is supported on DMM Digitize data acquisition mode only.
Parameter Typical return
<window function> = {FLAT | HANNing}
Default: FLAT
<first_pt> = An integer indicating the first data point of the range of readings to perform
post processing calculation to obtain the signal's magnitude/phase
Default: 1
<length> = An 2
n
integer (256, 512,1024, 2048, 4096, ….., 65536) indicating the number of
data points to perform post processing calculation to obtain the signal's magnitude/phase
Default: 256
(none)
Returns the FFT magnitude of 256 readings starting from the second data point.
FETC:FFTR:MAGN? FLAT,2,256
Typical response: +9.73982085E-03, +1.98526811E-02,+2.33925991E-02,.........,+2.93494016E-02
FETCh:FREQuency? [<first_pt>, [<last_pt>]]
Performs post-processing calculation on the specified range of readings and returns frequency for single channel
DMM digitizing.
For valid post processed measurement, please ensure data captured is at least 1 cycle.
This SCPI is supported on DMM Digitize data acquisition mode only.
Parameter Typical return
<first_pt> = An integer indicating the first data point of the range of readings to perform
post processing calculation to obtain the frequency.
Default: 1
<last_pt> = An integer indicating the last data point of the range of readings to perform
post processing calculation to obtain the frequency.
Default: 256
(none)
Returning the frequency of the range of readings from data number 1 to 500
FETCh:FREQ? 2,500
Typical response: +9.99975777E+00
120
Keysight DAQ970A/DAQ973A Programming Guide
2 SCPI Programming
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