REW Impedence measurement QMS and QES are way out -Please help

[Peregrine]

You have made several attempts to measure T / S parameters. I'm talking about the average between them. If it is 9.55 g, then the weight of all weights should be 8.3-8.6 g. If we divide it into 4 weights, we get 2.15 g, one out of four.

Each measurement yielded the same Mms result of 9.55g for the 6 inch driver. Thus the average remains 9.55g? Am I missing something.

 

[Peregrine]

Can air pressure have an impact on measurements? Where I am in Johannesburg is 1700m above sea level.

 

[jschwender]

Is the result depend on the sweep length in use?

 

[sm52]

Peregrine,
I think yes. But not dramatically. A little. Accuracy is most dependent on the selected weight. The mass should be measured with two decimal places. With accurate scales.

 

[sm52]

the sweep length

In previous versions of REW, I measured impedance at 1M. But I tried all the options.