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QUICK GUIDECommission an Installed Sound Environment
The THDN value is a ratio and represents how much of the
signal received by the XL2 is NOT this 1 kHz Sine wave. In
other words, the Total sum of any Harmonics, Distortions
and Noise (THDN) added by the component under test, ex-
pressed as a proportion of the original signal. The THDN
unit is shown as a percentage. e.g. 0.0031% means that
only 0.0031% of the signal being received by the XL2 is
THD+N.
Thus 100% - 0.0031% = 99.9969% of the signal being re-
ceived by the XL2 is the original 1 kHz Sine wave.
The THDN unit can also be shown in dB with every negative
6 dB meaning that the THDN is a factor of 2 less than the
original signal.
For tips on finding faults, see Appendix A.
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