We will leave FNC in locked state in order to investigate the relation between the FNC lock and PLL peaking.
As shown in Fig.1, FNC-X spectra was quite different from ones on 7/13 in spite of no change in FNC-Y.
Red and blue curve in Fig.1 show current X and Y spectra, respectively.
And magenta and cyan are ones on 7/13.
Now PLL spectra has loud peak reported also in klog#17659.
PLL peak may be related to FNC spectra. But data on 7/13 is slightly old as a reference (We had a lot of changes around PSL/POP/POS in recent weeks).
So in order to take latest reference of PLL and FNC spectra without loud peak, FNC will be kept in locked state during tonight.
Not noise excess over a wide frequency range in FNC-X is also vanished as shown in Fig.1. Red curve represents current clean spectra and magenta one represents noise excess.
But noise excesses on PLL-X and FNC-X doesn't always seem to be conincident.
Around 8/8 15:00 UTC, only the excess on FNC-X can be seen as shown in Fig.2.
So we may have to investigate these noise excess as individual issues.
