The module can output sine waves and square waves, 2 sine waves and 2 square waves. Frequency after 20-30MHz, the harmonics become larger and larger, and the waveform will become increasingly unclean. Square wave: 0-1MHz Uses a 70MHz low-pass filter to make the SN ratio of the waveform better.
* The DA reference pin (PIN12) is led out to facilitate the application of amplitude adjustment of the output waveform. * The reference input voltage of the comparator is generated by a variable resistor. Adjusting the resistor can get different duty cycle square waves. * AD9850 module uses 125MHz active crystal oscillator, AD9851 module uses 30MHZ active crystal oscillator