8.Remove power and connect load to use module. Use steps:1.Connect to power supply;2.Press rotary switch for 10second to switch Normal mode and Precise mode;3.Short press rotary switch to set frequency and change value by rotating switch;4.Press rotary switch for 2second to set duty cycle; 6.Test;7.Press button 'ON/OFF' to turn on or off PWM output; 5.Keep press for 5second to lock set parameters; XY-KPWM signal generator is a device that provides electrical signals at a variety of frequencies, square wave, and output levels.It is used as a signal source or excitation source for testing.Widely used in production practice and technology., Manufacturer: Mcnhbdgg