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MIF (Noise Budget)
tomotada.akutsu - 18:10 Monday 27 March 2023 (24557) Print this report
Comment to Projection of IMMT1T PIT onto DARM; revisited (24537)

Further investigation to study in which state the IMMT1 trans QPDs gets noisy. Fig. 1 is the spectrogram of K1:IMC-IMMT1_TRANS_QPDA2_DC_PIT_OUT_DQ, and Fig. 2 is K1:GRD-LSC_LOCK_STATE_N.

Fig. 3 shows some analysis of the behavior.

  • The 20-30 Hz, 117 Hz, and 163 Hz bumps excite when the guardian state is ENGAGE_PRMI_3F.
  • The 60 Hz, 120Hz, ... power-line-like peaks disapper after ISS.
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