Found the beat @ 116 MHz. RCAV SLOW =5.762V, ACAV SLOW = 1.209 V.

beat 1kHz input range, calibration  = 718 Hz/V

above, beat signal with 1kHz input range on Marconi.

Plenty of things that I need to optimize and add:

input optics (ACAV/RCAV):

• beam alignment
• optimizing quarter wave plates in front of the cavities.
• block all the reflected beams properly
• fixing the back reflection from vac window for ACAV.
• measure error point noise from both servos and compare them with beat
• optimizing TTFSS servo gain

Beat setup:

•  mode matching lens
• power on beat PD
• optimizing PLL servo
• implementing ISS

Seismic isolation

• new table legs ( I have not ordered the new set yet). The current set is broken
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