Jeff K, Darkhan T,

Last Tuesday we updated the infrastructure for injecting calibration lines (see LHO alogs 29245, 29249). Below is the table of currently active calibration lines:

Channel Names                 _FREQ (Hz)  _SINGAIN (ct)
H1:CAL-PCALY_PCALOSC1_OSC        36.7            125       O1-scheme kappa_TST / kappa_PU
H1:CAL-PCALY_PCALOSC2_OSC       331.9           2900       O1-scheme kappa_C / f_C

H1:CAL-PCALY_PCALOSC3_OSC      1083.7          15000       high-frequency calibration check ("bonus" line)

H1:CAL-PCALX_PCALOSC1_OSC      3501.3          39322       high-frequency sensing function characterization ("mobile" line)

                              _FREQ (Hz)  _CLKGAIN (ct)
H1:CAL-CS_TDEP_DARM_LINE1_DEMOD  37.3              0.1     O1-scheme kappa_PU
H1:SUS-ETMY_L3_CAL_LINE          35.9              0.11    O1-scheme kappa_TST / kappa_PU

H1:SUS-ETMY_L1_CAL_LINE          33.7             11       O2-scheme synched oscillator for kappa_U
H1:SUS-ETMY_L2_CAL_LINE          34.7              1.1     O2-scheme synched oscillator for kappa_P
H1:SUS-ETMY_L3_CAL2_LINE         35.3              0.11    O2-scheme synched oscillator for kappa_T

We plan to adjust the three O2-scheme line frequencies and amplitudes, and cancel them out with PCALY (they will not appear in the reconstructed DARM spectrum), following synchronized oscillators will be utilized for this purpose H1:CAL-PCALY_PCALOSC{4-6}_OSC.