Precautions: 1. It can be powered by 3.3v pin, and the power supply can provide a current of not less than 500mA. 2. The typical power supply is 5v. Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. 1. Product introduction: The core chip adopts the ADF4351 reference principle and optimizes the layout to achieve extremely high power flatness within the entire module operating frequency band. 2. Product parameters: Output frequency range: ADF4351: 35M-4400M (4.4G) Output signal: 2200M-4400M fundamental wave (sine wave) 35M-2200M fundamental wave frequency division (square wave) Output signal interface: SMA female Default +-50ppm 25M active crystal oscillator. Provides circuit diagram and STM32 test program in PDF format. Control : three-wire SPI. Leads out control pin and lock status pin. All functions can be realized, including point frequency, frequency sweep and frequency hopping. can be up to 1K and the low frequency step can be up to 0.1K. According to the crystal Determined by frequency. Material: PCB colour: Black Package Contents: 1 x ADF4351 Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.