DDS Signal Generator Module Development Board Key features and benefits - Dual sine and dual square outputs: The module can generate two sine wave outputs up to 40 MHz (AD9850) and two square wave outputs up to 1 MHz. This enables simultaneous multi-waveform testing and signal comparison without multiple instruments. - Signal quality optimization: Harmonics increase and waveform quality degrades beyond 20-30 MHz. An integrated 70 MHz low-pass filter improves the SNR and maintains cleaner waveforms within its effective range. - Amplitude and duty cycle control: A dedicated DAC reference pin allows easy amplitude adjustment of the output signal. The duty cycle of the square wave can be adjusted with a variable resistor, giving flexible waveform shaping for various test needs. - Flexible oscillator and input options: The AD9850 variant uses a 125 MHz active oscillator, while the AD9851 variant uses a 30 MHz active oscillator. The board supports both parallel and serial data input through a single data path, simplifying integration with controllers. - Compact and space-saving design: The module measures 5 cm x 2.6 cm, making it suitable for compact test setups and crowded workspaces. Technical specifications (highlights) - Outputs: 2 sine wave outputs (up to 40 MHz with AD9850), 2 square wave outputs (up to 1 MHz) - Harmonics/Signal quality: Harmonics increase and waveform quality degrades above 20-30 MHz; improved by a 70 MHz low-pass filter - Amplitude control: DAC reference pin for output amplitude adjustment - Duty cycle control: Adjustable with a variable resistor for the square wave - Oscillators: AD9850 version includes 125 MHz oscillator; AD9851 version includes 30 MHz oscillator - Data input: Supports both parallel and serial data input via a single data line - Size: 5 cm x 2.6 cm Applications and use scenarios - Bench testing and electronics characterization: Generate synchronized dual sine and dual square signals for device calibration, filter testing, and receiver/ADC/DAC evaluation. - RF and communications experimentation: Use as a compact signal source for RF front-end testing, LO generation, and waveform shaping in development of communication systems. - Education, prototyping, and microcontroller/FPGA projects: Integrate with microcontrollers or FPGAs to prove concepts, prototype waveforms, or perform waveform synthesis in teaching labs and hobby projects.