The module can output two sine waves and two square waves
AD9850 frequency range: 0-40MHz
Harmonic becomes bigger and bigger and unclean after 20-30MHz
Square wave:0-1MHz.
Generated DA reference pins(PIN12)extraction is convenient for the amplitude control application of input
Referrence input termina voltage of comparator is generated by a variable resistor, to adjust the resistor can obtain square wave of different duty cycle