DDS Signal Generator Module Development Board - Output capability: can generate two sine waves and two square waves. Frequency ranges are 0-40 MHz for the AD9850 sine output and 0-1 MHz for the square wave output. Harmonics increase and waveform purity degrades after about 20-30 MHz. A 70 MHz low-pass filter improves the waveform SNR. - Amplitude and start-up control: includes a DAC reference pin to easily adjust the output waveform amplitude. The duty cycle of the square wave is adjustable with a variable resistor. - Oscillator and input options: the AD9850 version uses a 125 MHz active oscillator, while the AD9851 version uses a 30 MHz active oscillator. The module supports both parallel and serial data input via a single interface. - Compact design: dimensions are 5 cm x 2.6 cm, offering a small, space-saving solution. Use scenarios: - RF prototyping and bench testing: generate clean test tones up to 40 MHz for quick evaluation of RF front-ends and filers. - ADC/DAC testing and waveform calibration: adjustable amplitude and duty cycle facilitate precise signal conditioning and device testing. - Education and lab work: compact DDS module helps students and engineers learn DDS concepts without bulky equipment. Brand-consistent and specification-faithful, this module emphasizes function, compatibility, size, performance, and value for signal generation needs.