The multiple LOCKIN module has been newly added on the LSC realtime model.
The purpose is to demodulate ALL the LSC sensors at once while a particular DOF is excited by an oscillator.
So far the model has been successfully compiled and running okay.
I will make some MEDM screens for this multiple-LOCKIN system.
(Some details)
The picture below is a screen shot of the LSC real time model, zoomed in the new LOCKIN part.
The LOCKIN module consists of three big components:
- A Master oscillator
- This shakes a desired DOF through the LSC output matrix and provides each demodulator with sine and cosine local oscillator signals.
- This part is shown in the upper side of the screen shot.
- The sine and cosine local oscillator signals appear as red and blue tags respectively in the screen shot.
- An input matrix
- To allow us to select the signals that we want to demodulate.
- This is shown in the left hand side of the screen shot.
- Demodulators
- These demodulators demodulate the LSC sensor signals by the sine and cosine signals provided from the master oscillator.
- With the input matrix fully diagonalized, one can demodulate all the LSC signals at once.
- The number of demodulators is 27, which corresponds to that of available LSC error signals (e.g. AS55_I, AS55_Q, and etc.).
- This part is shown in the middle of the screen shot.
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