My servo is classic SG90. I connected +5V and gnd correctly to a dc power supply. Then I connected output of a signal generator which generates 0-5 V pulses at 50Hz (checked by oscilloscope).
I know that the duty cycle determines the position of a servo motor. I can vary the duty cycle between %20 and %80 from the settings of the signal generator and I can observe that pulse is changing accordingly via the oscilloscope. However, servo does not responds. What am I missing?