Two sine outputs and two square-wave outputs provide flexible waveform options for a DDS signal source. Key benefits - Improved waveform SNR with a 70 MHz low-pass filter for cleaner signals. - Pin-accessible amplitude control enables easy output level adjustment for different applications. - Flexible square-wave duty cycle controlled by a variable resistor via the comparator reference input. - Stable and precise frequency generation: AD9850 module uses a 125 MHz active oscillator; AD9851 module uses a 30 MHz active oscillator. - Supports both parallel and serial data input for compatibility with various control schemes. Specifications and features - Frequency range (AD9850): 0–40 MHz - Outputs: two sine-wave outputs and two square-wave outputs - Harmonic distortion: increases above 20–30 MHz - Square-wave frequency: 0–1 MHz - Waveform quality enhanced by 70 MHz low-pass filter - Data input: supports parallel and serial formats - Amplitude adjustment: accessible pin for easy amplitude adjustment - Duty cycle control: square-wave on-time adjustable via the variable resistor - Oscillators: stable 125 MHz (AD9850) or 30 MHz (AD9851) - Dimensions: 4.5 x 2.6 cm Typical applications - Lab signal generator for RF and electronics experiments - DDS source for microcontroller projects, hobbyist electronics, or SDR test setups - Educational demonstrations of waveform generation and signal integrity