I don't know if I understand the question. To set HPWM at 20ms, you need to slow your pic down to 0.5 Mhz (if you are using the hardware PWM). But then you only get about 32 different settings from 1ms to 2ms. Maybe you are asking what happens to the servo when you send the 1.5ms pulses quicker than 50 hertz?
How are you doing it Ken?
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