With optical attenuation only

For ~ 92kW power in the FP-cavity:

• Alplhanov amplifier ratio : 33%
   
• Axis 18 position : +0003768 steps
   
• PID A (for laser/FPC lock) :

input : input a
P = 0.1
I = 0.0015
D = 1.5
Sign : positive
Sampling : fast
filter : off

• Search A :

criterion : input d
upper th. : 10V
lower th. : 0.05V
speed : 100V/s
relock mode : none
off mode : hold

• Output A :

range : 50%
offset : 5V

• PID B (for RF/FPC lock) :

input : input b
P = 5
I = 0.0001
D = 1
Sign : negative
Sampling : mid
filter : off

• Search B :

criterion : input c
upper th. : 0.45V
lower th. : -0.45V
speed : 1V/s
relock mode : none
off mode : hold

• Output B :

range : 20%
offset : 5V