1. AD9850 and AD9851: The module can output sine waves and square waves, with 2 sine waves and 2 square waves. The frequency range of AD9850 is 0 40MHz, while AD9851 is 0 70MHz. However, at frequencies above 20 30 MHz, the harmonics increase and the waveform becomes less clean. Rectangular wave output is in the range of 0 1 MHz. 2. Improved waveform quality: A 70 MHz low pass filter is used to improve the signal to noise ratio of the waveform, better waveform quality. 3. Flexible amplitude adjustment: Designed with a pin (PIN to generate the DA reference, which enables easier adjustment of the output waveform amplitude according to different application requirements. 4. Variable switch on square waves: The reference input voltage of the comparator is generated by a variable resistor that allows adjustment of the duty cycle of the square wave output. 5. Stable Oscillators: The AD9850 module uses an active oscillator at 125 MHz, while the AD9851 module contains an active oscillator at 30 MHz, with stable and reliable performance. 6. Compact size: The dimensions of the module are 5 cm x 2.6 cm, which makes it compact and easy to integrate into different projects.