Returns the total harmonics distortion (THD), measured as a percentage of the power in the fundamental signal.

THD (%) = SQRT (Total power of all enabled harmonics - Power in fundamental) * 100 / Power in fundamental

You do not need to use a selector string to read this result for default signal and result instance. Refer to the Selector Strings topic for information about the string syntax for named signals and results.

Remarks

The following table lists the characteristics of this property.

Short Name Harm Results THD (%)
Data type cdbl.png
Permissions Read Only
High-level VIs RFmxSpecAn Harm Fetch Fundamental Measurement
Resettable No