Can someone help me test IMD?

[ShiZo]

I keep trying to test IMD on my RME ADI 2/4 and I keep getting a flat line like this. I'm basically trying to run the same test Amir runs that can be used to show the ESS IMD hump. dB always stays at 0

 

[NTK]

Try rescale the vertical axis from -1600 to 3400 dB to something like - 100 to 0 dB and see what the curve looks like.

 

[kemmler3D]

DAC produces 2500dB IMD

Solar system explodes

 

[ShiZo]

Try rescale the vertical axis from -1600 to 3400 dB to something like - 100 to 0 dB and see what the curve looks like.

Oh sorry, I Just scrolled back a lot to get the pic. It doesn't matter the scale, it stays at 0 db

 

[Rantapossu]

I keep trying to test IMD on my RME ADI 2/4 and I keep getting a flat line like this. I'm basically trying to run the same test Amir runs that can be used to show the ESS IMD hump. dB always stays at 0



View attachment 452380

It seems to measure correctly:

Please use the mouse wheel over the axis units to zoom both axis independently (The red arrows) and post a new screenshot:

 

[ShiZo]

Okay, you guys were completely right. It was just the fact I wasn't doing independent scaling via each side to see what was going on. Thank you for all your help!