ATIS Telecom Glossary
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total harmonic distortion (THD)
Of a signal, the ratio of (a) the sum of the powers of all harmonic frequencies above the fundamental frequency to (b) the power of the fundamental frequency. Note 1: The THD is usually expressed in dB. Note 2: Measurements for calculating the THD are made at the output of a device under specified conditions.

 

 

 

 

 

 

 

 

 

 



 
These definitions were prepared by ATIS Committee PRQC
 
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