LIMP measurements WAYYY too high

[tuxedocivic]

Hey all,

Hopefully this is an easy fix. I made a jig like the one here: Measuring Frequency Response Using ARTA

I'm using a 16.4 ohm resistor (well, 2 8.2 ohms in series), and I get this:

50 ohms minimum and almost 2000 ohms at Fs!!! I've adjusted the reference resistor setting up and down with no change. Is there a setting I'm missing? Any help is appreciated.

 

[tuxedocivic]

Any help is very much appreciated

 

[Henry8]

i dont use this software, but your ref R and dut should form a voltage divider, then the software measures the v arcoss you dut and calcs imp.
Check your connections etc, software setup etc.
Use a 10R etc instead of a speaker for now, when everything is ok it should measure 10R at 0deg across your set freq range. Then you can test a driver knowing your setp is ok.

 

[tuxedocivic]

For people in the future, it was my input on my computer. I used mic. Now it's in Line in and it works. Thanks Henry.