Hi,
All regular R/C servos (hobby servos) use the same protocol. It's a PDM signal with a repetition rate of ~20ms and a pulse duration from 1ms to 2ms, with 1.5ms being center position.
Unfortunately it's a standard that most servo manufacturers like to break, so the pulse duration may be from ~0.3ms to ~2.8ms worst case, depending on which servo you have.