Applies to: EUTs with analogue outputs.
Aim: To measure the total of HF imaging components beyond the audio band which are output from
the EUT's D/A converter, as a result of applied audio-band signals.
Method
The analogue output of the EUT is measured with a â€"20dBFS sinusoidal stimulus applied, swept from 10Hz to the upper band-edge frequency or 10kHz (whichever is the lower). Components within the audio band are excluded by using the standard high-pass filter. The total RMS amplitude of all the components above the upper band-edge frequency of the EUT is measured for both channels at each frequency, and plotted graphically. The greatest result for each channel,expressed in dBFS, is also presented at the end of the test.
References
http://resources.prismsound.com/tm/dS3_Applications_Manual_A4nc.pdf
AES17 - Suppression of imaging components.png