Romeo-All in one Controller V1.1 (PLL)

Hi
I am wondering if anyone has more information on PLL (Phase Lock Loop) for the Romeo-All in one Controller V1.1. Anythign more than the wiki contains would be great!
I am trying to understand how is works, what is actaully happening when in that mode, I have it working and the output to input ratio is linear which is why I am using this mode.
I am wondering if anyone has more information on PLL (Phase Lock Loop) for the Romeo-All in one Controller V1.1. Anythign more than the wiki contains would be great!
I am trying to understand how is works, what is actaully happening when in that mode, I have it working and the output to input ratio is linear which is why I am using this mode.