Interface Calibration

Hi, I am just wondering about interface calibration is it correct that my microphone is connected to my left input 1 and my Loopback is connected to my right output 2 and input 2.

When I go through the pages of calibration, it seems that the calibration input is been taken from the microphone input 1.

Preferences. I have set up my microphone to come in on the left and the loop back on the right (default).

In the levels panel, I see Out, In Ref In, is Ref in Loopback. = calibration?

What am I doing incorrect here?

Thanks

Ah I see, so then I calibrate Ch1, then remove loopback from Ch1 and put it in Ch2?

And the reason we are doing this is because we need to calibrate the microphone channel?

Thanks a lot.