Keithley 2016 User Manual page 193

:HARMonic[:UPPer] <NRf>
[:SENSe[1]]:DISTortion:HARMonic[:UPPer] <NRf>
Parameters
<NRf> =
Query
:HARMonic?
Description
This command controls the number of harmonics included in the distortion
calculation. The number of harmonics acts like a low-pass filter, allowing
only the second harmonic through harmonic <n> to affect the calculated
distortion.
The harmonics setting has no effect on THD+n or SINAD measurements,
and sending this command generates a -221 Settings Conflict Error. The
harmonic value may be queried, however.
:SFILter <name>
[:SENSe[1]]:DISTortion:SFILter <name>
Parameters
<name> =
Query
:SFILter?
Description
This command selects the shaping filter, if any, to apply to the measured
waveform.
SCPI Command Reference
Set last harmonic included in measurement
2 to 64 Set last harmonic
Query last harmonic
Select the shaping filter for distortion
calculation
NONE No filter, flat response
C C Message Weighting filter
CCITT CCITT filter
CCIRARM CCIR/ARM filter
A "A" Weighting filter
CCIR CCIR filter
Query filter choice
5-51