Features: This ADF4351 signal source development board has well designed circuit board layout. It can be controlled by the upper computer official software. All control pins are leaded out for convenient operation. Default + -50ppm 25M active crystal oscillator. Circuit diagram in PDF format and STM32 test program are provided. Three-wire SPI lead to control pin and state locking pin,allowing all functions including point frequency sweep and frequency hopping, stepping to 1K. Specifications:Output Frequency Range: ADF4351: 35M-4.4G Power Supply: DC002 Interface DC4-9V(typical 5V) Output Signal: 2.2-4.4G fundamental wave (sine wave), 35M-2.2G fundamental division (square wave) Signal Output Connector: SMA female Size: 49 x 37 x 12mm / 1.93 x 1.45 x 0.47" Package Includes:1 x Signal Source Development Board Note:This board requires professional knowledge and ability, please make sure you know how to use it. .