Features This ADF4351 signal source development board has a well-designed circuit board design. The frequency synthesizer development board can be controlled by the official software of the top computer. All the control pins of the phase lock loop plate are pulled out for convenient operation. Default + -50ppm 25M active crystal oscillator. The three-wire serial peripheral interface bus cable leads to the control pin and state lock pin, allowing for all functions including point frequency sweep and frequency hopping. Features: This ADF4351 signal source development board has a well-designed circuit board design. The development board of the frequency synthesizer can be controlled by the official software of the upper computer. All control pins of the phase lock loop plate are pulled out for convenient operation. Default + -50ppm 25M active crystal oscillator. The three-wire serial peripheral interface bus cable leads to the control pin and state lock pin, allowing all functions including point frequency sweep and frequency hop. Budget: Output frequency range: 35MHz - 4.4GHz Power voltage: 4-9V (5VDC) Output signal: 2.2GHz - 4.4GHz sine wave (fundamental) 35MHZ - 2.2GHz square wave (fundamental division) Output signal: output speed, signal strength: +5dBm (programmable) RF connector: SMA female head Control interface: Three-wire serial peripheral interface bus Reference clock: 10,000MHZ (default), via interface to an external SMA Size: approx. 4.8 x 4.8 cm / 1.89 x 1.93 inches Weight: 15 g Connection: Module can fix LCD1602 / LCD12864 microcontroller module connection (can be connected directly backward), convenient software debugging, both lock indicators (Lock).Pin corresponds to the following: 1.GND ------------------------- GND 2.VDD (5V) ------------------- VDC 3.VO -------------------------- NC (empty) 4.RS -------------------------- NC (empty) 5.R / W ------------------------- MUXOUT 6.EN -------------------------- CLK 7.DB0 ------------------------- DATA 8.DB1 ------------------------- LE 9.DB2 ------------------------- CE (has 10K pullup) 10.DB3 ------------------------- GND (not taking) refer watch Package List