sagyman:
It is possible to change the frequency of the servo from 50 Hz to 60Hz?
Which part of the servo control signal or h-bridge control are you referencing. The hobby servo control component expects to receive a control pulse every 2-20ms. I've read that the h-bridge in a hobby servo is pulsed at 50Hz. If you want a higher h-bridge pulse frequency, get a digital servo which have significantly higher h-bridge pulse frequencies..