1) DC ext channel on PMC servo: 32.82 MHz/ V
2) Fast channel on the laser controller: 3.07 MHz/V ( Our Fn generator can provide +/- 20V -> 60 MHz span, this won't let us see all three peaks of the error signal from RefCav which has 35.5x2 = 71 MHz span)
3) Temperature actuator on the laser control: 220 MHz/V. (1FSR= 714 MHz, 2x cavity length = 0.42m)
This measurement is done by scanning the laser frequency (1 and 3)or cavity length (2) and see the error signal.
The two sidebands are 43 MHz apart , divided that by the corresponding Voltage difference of the sidebands to get the calibration. For Temperature actuator we see use the PMC's FSR instead of the sidebands for better accuracy.