What is the difference between SETPOINT MOD and RAMP IN on the PI200?
Last updated: 2026-09-17
SETPOINT MOD changes the servo error-signal setpoint. RAMP IN is mixed into SLOW OUT and is mainly for open-loop scanning of the slow actuator.
See typical PI200 laser-locking setup.
The RAMP IN transfer gain depends on the SLOW sign jumper. See Why does PI200 RAMP IN amplitude decrease when the SLOW sign jumper is fitted?.
