Features 1. This ADF4351 signal source board adopts with three-wire serial peripheral interface design to provide an easy operation. Three-wire Spilead to control pin and state locking pin, allowing all functions including point frequency sweep and frequency hopping, stepping to 1K, low frequency step can be 0.1K, according to crystal frequency. 2. This ADF4351 signal source development board has well designed circuit board layout.All control pins are leaded out for convenient operation. 3. There's a default + -50ppm 25M active crystal oscillator, with which the circuit diagram in PDF format and STM32 test program are provided 4. The control interface of the single chip micro controller for easy controlling independently.It can also control ADF5355. 5. This Signal Source Frequency Synthesizer Development Board has isolation applications, the RF output level can mute, and the mute function can be controlled either by pin or software, and it also provides auxiliary RF output that can be turned off when not in use 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 (squarewave) Signal Output Connector: SMA female Weight: 36g File Download: http://pan.baidu.com/s/1dE84sGp (password: nlwq) Package Included: 1 x signal Generator 1 x sma holder 1 x USB cable Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List