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CAL (General)
takahiro.yamamoto - 10:12 Thursday 16 April 2020 (14184) Print this report
Calibration weekly measurement
We performed a weekly calibration measurement.
ResG(2.9,10,20) is applied as FM5 of DARM2.

5:30 - Disabled OBSERVING mode
5:30 - DARM Transfer function measurement
6:30 - Hardware Injection test from X-end PCAL
7:15 - Duotone injection test
9:00 - Enabled OBSERVING mode

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Comments to this report:
tomotada.akutsu - 13:11 Thursday 16 April 2020 (14191) Print this report

Let me ask a simple question: it seems the open-loop gain is different about 5dB from that on Mar 10. Is it ok???

yuki.inoue - 13:30 Thursday 16 April 2020 (14193) Print this report
This 5dB is from TransCOMP in OMC digital filter.
In last fitting, we cannot find this changes.
So, we misestimated the parameter in last time.
But, we use the correct filter now.

I think we should compare with Apr.7 measurement.
Main change between Apr.7 and Today's measurement is only G_res function in DARM_2 (in my understanding).
yuki.inoue - 13:31 Thursday 16 April 2020 (14194) Print this report
The estimated parameter is following.

Hx=( 4.712841717838098 pm 0.03217269398501693 )x1e-12
Hy=( 4.05570284990468 pm 0.02989602761599388 )x1e-12
tau_ax=( 13.278320925890085 pm 1.7613223340804662 )x1e-6
tau_ay=( 13.168774809423168 pm 1.8025234699237673 )x1e-6
Hc=( 0.06256912341942894 pm 0.00100336147242244 )x1e8
fcc=( 20.063355353982555 pm 0.3592990098735488 )
tau_c=( -36.6264287359882 pm 4.168132625308112 )x1e-6
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