The hardware pwm. Select in the Realizer hardware settings:

• CCP tab: enable and mode CCP1= PWM mode.
• Timer2 tab: enable and select the prescaler (1:16). 

The period and dutycycle register are written.  The PWM uses timer2 (PR2). The period or frequency is:

Tperiod = (PR2+1)*4*Tosc*TMR2 Prescaler  = (255+1) * 4 * 50nSec * 16 = 819,2 usec == 1220 Hz