AES17 - Idle Channel Noise Spectrum

[Tranquility Bass]

Applies to: EUTs with analogue or digital inputs and analogue or digital outputs.

Aim: To measure the output noise spectrum of the EUT with no signal present.

Method
If the EUT has a digital input, it is fed with a digital-zero signal; if the EUT has an analogue input it is
terminated with 50R (or 25R if unbalanced).
The RMS amplitude of the output noise of the EUT is measured via the standard weighting filter in a
range of 1/3 octave bands between 20Hz and the upper band-edge frequency. The result is graphed
for each channel in dBFS (in the case of an analogue measurement, this is equivalent to dB below
the specified D/A line-up).

References
http://resources.prismsound.com/tm/dS3_Applications_Manual_A4nc.pdf

[Tranquility Bass]