= Force transfer function =
-- The attachments shows some force-transfer functions of the payloads, measured with X-arm signal.
-- A sinusoidal input was injected into {TM / IM / MN}_L with 'swept sine' option.
-- K1:LSC-MCL_OUT_DQ was used to sense the TM_L motion.
-- The TM_L signal was calculated (calibrated) by:
  TM_L = ( K1:LSC-MCL_OUT_DQ ) * (transfer function of the typeC)
  -- transfer function of the typeC here is:


-- Then the results are here:


== Issues ==
-- I could not get the sense why the phase difference in TM to TM transfer function of ITMX was sticked to 150 deg.
  -- Would anyone please give me any comments what could cause this issue?
-- The unit of the inputs is to be corrected, it is still in counts in the following plots.
-- They are to be compared with the simulated results.