Features: 1. AD9850: 0-40MHz. 2. 2 sine wave and 2 square wave output. 3. After the 20-30MHz frequency harmonics increases, the waveform will be less and less clean. 4. Square Wave: 0-1MHz. 5. Low-pass filter with 70MHz, so the waveform better than SN. 6. Parallel and serial data input can be selected via a jumper. 7. DA produced the benchmark pin (PIN12) leads for easy adjustment to do the magnitude of the output waveform Application. 8. Comparator reference input voltage generated by the variable resistor, the resistor can be adjusted duty cycle square wave of different. 9. Active AD9850 125MHz crystal oscillator modules. 10. Dimension:4.5cm x 2.6cm Package Included: 1PCS x AD9850 DDS Signal Generator Module 0-40MHz Test Equipment Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.