Using 70MHz low-pass filter 2 sine wave and 2 square wave output. The pin (PIN12) that generates the DA reference is drawn out, which is convenient for the amplitude adjustment application of the output waveform The reference input terminal voltage of the comparator is generated by a variable resistor, and the square wave with different duty ratios can be obtained by adjusting the resistor AD9850 module uses 125MHz active crystal oscillator Colour:As Shown Material:PC+Metal Package Contents: 1 * AD9850 DDS Signal Generator Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.