Precision control interface The ADF4351 development board uses a three-wire SPI design to directly manage frequency functions such as sweeping and hopping. The frequency steps are adjustable from 0.1K to 1K, enabling precise control for RF experiments and tuning. User-friendly operation Designed for simple operation, this module can be controlled via upper computer software. All control pins are easily accessible, enhancing interaction and operational convenience for engineers and developers. Robust circuit architecture The board features a carefully designed circuit layout that delivers dependable RF source performance across a range of applications. This makes it a reliable choice for development and testing. Integrated crystal oscillator Includes a ±50ppm 25M active crystal oscillator, with a circuit diagram in PDF format and an STM32 test program for efficient implementation and testing. Use scenarios - RF transceiver development and calibration: precise local oscillator control with sweep/hop functionality and adjustable steps. - Lab signal generation and testing: generating controlled RF signals for components, filters, mixers, and amplifiers. - Embedded system prototyping: stable 25 MHz reference and SPI-driven control to support RF reference and testing in new designs.