Describe KAGRA/Subgroups/VIS/OpsManual/OpLev/TypeB here.

1. In the corresponding directory for the suspension you are working with, create a new directory with the date as a name. For example,
   • /kagra/Dropbox/Subsystems/VIS/TypeBData/SRM/OPLEV/measurements/20191208/
2. Into the newly created directory copy the corresponding template files from
   • /kagra/Dropbox/Subsystems/VIS/TypeBData/SRM/OPLEV/templates/ The templates are different for each suspension, therefore make sure you use the appropriate directory
3. Align the optic into a convenient orientation.
   • Use Guardian to set the suspension in IM_DAMP mode.
   • Align the oplev beam to the centre of the QPDs. Use the IM test channels to move the marionette such that the readout of the oplev in Normalized Displacement Units (ndu) are close to zero.

4. Use diaggui to open the file SRM_TM_OPLEV_L_PREDIAG.xml, execute it, wait until it finishes and then save the results. Mind the name, it follows the suspension.

5. Use diaggui to open the file SRM_TM_OPLEV_P_PREDIAG.xml, execute it, wait until it finishes and then save the results. Mind the name, it follows the suspension.

6. Use diaggui to open the file SRM_TM_OPLEV_Y_PREDIAG.xml, execute it, wait until it finishes and then save the results. Mind the name, it follows the suspension.

7. Open the file SRM_TM_OPLEV_L_PREDIAG.xml. At the TM-L resonant frequency around 0.656 Hz

   • Take a note of the amplitudes x_len and y_len in the plot "ADS: x_len (red), y_len (blue)" using the cursor feature,

   • Take a note of the relative phase between x_len and y_len; use the plot "Transfer function: x_len and y_len relative phase"; HOW TO USE THIS INFORMATION CORRECTLY?

   • Take a note of the amplitudes x_tilt and y_tilt in the plot "ADS: x_tilt (red), y_tilt (blue)".

   • Take a note of the relative phase between x_tilt and y_tilt; use the plot "Transfer function: x_tilt and y_tilt relative phase"; HOW TO USE THIS INFORMATION CORRECTLY?

8. Open the file SRM_TM_OPLEV_P_PREDIAG.xml. At the TM-P resonant frequency around 0.820 Hz

   • Take a note of the amplitudes x_len and y_len in the plot "ADS: x_len (red), y_len (blue)" using the cursor feature

   • Take a note of the relative phase between x_len and y_len; use the plot "Transfer function: x_len and y_len relative phase"; HOW TO USE THIS INFORMATION CORRECTLY?

   • Take a note of the amplitudes x_tilt and y_tilt in the plot "ADS: x_tilt (red), y_tilt (blue)".

   • Take a note of the relative phase between x_tilt and y_tilt; use the plot "Transfer function: x_tilt and y_tilt relative phase"; HOW TO USE THIS INFORMATION CORRECTLY?

9. Open the file SRM_TM_OPLEV_Y_PREDIAG.xml. At the TM-P resonant frequency around 1 Hz

   • Take a note of the amplitudes x_len and y_len in the plot "ADS: x_len (red), y_len (blue)" using the cursor feature,

   • Take a note of the relative phase between x_len and y_len; use the plot "Transfer function: x_len and y_len relative phase"; HOW TO USE THIS INFORMATION CORRECTLY?

   • Take a note of the amplitudes x_tilt and y_tilt in the plot "ADS: x_tilt (red), y_tilt (blue)".

   • Take a note of the relative phase between x_tilt and y_tilt; use the plot "Transfer function: x_tilt and y_tilt relative phase"; HOW TO USE THIS INFORMATION CORRECTLY?

10. Open the Matlab file oplev_diagonalization.m
11. Scroll down to around line 104 and make sure the right-hand side of the five listed assignments refer to the suspension you are working with (BS, SR2, SR3, SRM).

12. Scroll down to around line 133 and write the information in the section according to the examples, which are commented lines. How to write the signs correctly?

13. Execute the file. Copy the matrix into the medm screen.
14. Run diagnosis
15. Write a klog with the following format.