CEA 2010 - Peak Value Reported vs RTA Spectrum Peak

[Audio_Guy_UofW]

Hi,
I am sure there is a simple explanation, but I am trying to figure out why the CEA2010 peak value reported is so much higher than the RTA spectrum value at the peak. See attached chart. Based on the input levels, I actually would expect that the acoustic peak level would be around that reported by the CEA2010. Used the capture values for smoothing, FFT length, etc recommended in the help section.

See screen shot below.

Thanks
Thanks

 

[John Mulcahy]

That figure is the peak level of the bandpass filtered time domain signal, per the specification.

 

[Audio_Guy_UofW]

Thanks John, makes sense. I have another question. In the attached measurement, which has quite high distortion, the overlay does not appear to be lined up with the fundamental. How can I correct this?
Thanks

 

[Audio_Guy_UofW]

OK, I think I figured it out. I didn't realize that the generator still had to be running to generate the template...so it was set to the wrong frequency.