DDS Signal Generator Module Development Board Key benefits - Flexible signal generation: outputs two sine waves and two square waves with independent channels for versatile experimentation. - Wide frequency coverage: 0-40 MHz available on the AD9850 channel and 0-70 MHz on the other channel, enabling a broad range of DDS applications. Square wave output is available up to 1 MHz. - Improved signal quality: equipped with a 70 MHz low-pass filter to provide a better signal-to-noise ratio for the waveform. - Easy amplitude control: one pin is provided for convenient amplitude adjustment of the output waveform. - Precise waveform duty control: the reference input voltage of the comparator is generated by a variable resistor, allowing different switch-on cycles for the square waves. - Stable and reliable oscillation: AD9850 module uses an active oscillator at 125 MHz, while the AD9851 module uses an active oscillator at 30 MHz, ensuring stable performance. What is included - DDS signal generation hardware capable of two sine outputs and two square outputs - 70 MHz low-pass filter for improved signal quality - A dedicated pin for amplitude adjustment - Variable resistor-based reference input for square wave duty cycle control - Models available with AD9850 and AD9851 based oscillators and performance characteristics Specifications (highlights) - Outputs: two sine wave outputs and two square wave outputs - Frequency range: 0-40 MHz (AD9850) and 0-70 MHz (AD9850) - Square wave output capability: up to 1 MHz - Signal quality enhancement: 70 MHz low-pass filter - Amplitude adjustment: one control pin provided - Duty cycle control: reference input voltage generated by a variable resistor for square wave switch-on cycles - Oscillator reference: AD9850 module uses 125 MHz active oscillator; AD9851 module uses 30 MHz active oscillator Compatibility and usage considerations - Designed for use with AD9850 and AD9851 based configurations - Suitable for laboratory development work, signal generation tests, and electronics experimentation - Provides dual channel sine and square wave generation with configurable amplitude and duty cycle Applications and use scenarios - RF and signal chain testing: generate clean sine waves for mixers, demodulators, and RF filters; compare response with known references - System prototyping and bench testing: create test signals for microcontroller interfaces, ADC/DAC calibration, and audio/spectrum analysis prototypes - Education and demonstrations: practical DDS waveform experiments in electronics labs to illustrate frequency, amplitude, and duty cycle relationships - Instrumentation and measurement setup: verify response of amplifiers, filters, and ADC front-ends using precise, repeatable waveforms Note - The described frequency ranges and oscillator configurations reflect the AD9850 and AD9851 model implementations as specified. - This development board provides a compact, flexible platform for configuring and testing DDS-based signal generation without modifying core circuitry.