Main features:
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