Impedance Measurement Error

[immortal]

Hello, I seem to be having some issues measuring impedance.

I have followed the instructions on the REW site.

I get this error:

However the levels match within 1db when doing a 1khz sine wave

Do you know what the issue could be?

 

[John Mulcahy]

How do the levels look while making the open circuit calibration measurement? Are you making any change other than leaving the leads not connected to a load when making that measurement?

 

[immortal]

Thanks for your quick reply!

Those levels were when doing the open circuit calibration

 

[immortal]

I have had a go using Arta Limp and successfully calibrated and measured the impedance.

This is with exactly the same sound card settings and hardware

 

[John Mulcahy]

Which REW version? Note that with REW there is no calibration mode for the measurement jig, it stays the same as for measurement.

 

[immortal]

I was on an older version but then upgraded to the latest version

 

[John Mulcahy]

Could try the 5.40 beta build, though I haven't seen reports of problems with 5.31.3.

 

[immortal]

I have installed that, i will give it a go.

Also the API looks great!