Evan, Yuta

We redid the Michelson noise budget using the NB simulink tool.
The data we used was taken from the long strech MICH lock on Feb 17 (see alog #10127).
The noise budget agrees well with we have done by hand (see alog #10221, #10217).
NB model works pretty nicely.

[Result]
NB_MICH_1076736130.png: Michelson noise budget plot. "Measured" curve shows the sensitivity curve calibrated from H1:LSC-MICH_OUT. Seismic noise is copied from LLO measurement, so seismic noise curve is not real.

sensorNB_MICH_1076736130.png: Noise budget for sensor noises. Low frequency noise mainly comes from the demodulator board noise. Compared with the one we did by hand (alog #10221), there is a factor of 5 difference in ADC noise. This is because we forget to put the PD filter bank gain (H1:LSC-REFLAIR_A_RF45_(I|Q)_GAIN) in the previous one.

[Note on NbNoiseSink]
If you put NbNoiseSink block into your model, noise at the sink will be calibrated by taking out the model loop gain. If you specify a DAQ channel to that sink and if you run 'nbAcquireData' function, it gets the actual data from a NDS server (using Matlab "get_data" function). So, NB tool automatically calculates the sensitivity curve for given GPS time.

Also, note that LiveParts and data fetching fail if you specify GPS time more than ~7 days ago. I'm not sure why, but it is a limitation from "get_data" function.