I measured OLTF of CARM when PRFPMI was locked with RF signals (fig1).
Thin line shows the OLTF with original IMC CMS IN1 gain and thick line represents that with IMC CMS IN1 gain reduced by 2dB.
Since CARM OLTF has a large bump at 200kHz with the original IMC CMS IN1 gain due to gain peaking, it shuld be reduced slightly.

So, I modified the IMC guardian so that the nominal gain becomes 2dB smaller (fig2).
To keep the relative gain between IN1 and IN2, I also reduced IN2 gain by 2dB: final IN2 gain is 0dB.
Since offset compensation at 0dB was not implemented yet, I measured it and updated the values between 0dB and 7dB (fig3).
Since Moku:Lab is not connected, I didn't measure the OLTF of IMC loop with new gain but the UGF and phase margig should be 140kHz and 35degrees, respectively, according to the previous measurement (klog35340).

I also measured the MCL loop crosspver frequency and no significant change was observed, so I kept the current gain for MCL loop.