Upgrades For One R9:MAX2837 is replaced by MAX2839. Si5351C is replaced by Si5351A with additional clock distribution. A series diode is added to the antenna port power supply. for One is a peripheral capable of transmission or reception of radio signals from 1 MHz to 6 GHz. Designed to enable test and development of modern and generation radio technologies, One is an hardware platform that can be used as a USB peripheral or programmed for stand-alone operation. 1 MHz to 6 GHz operating frequency Half-duplex transceiver Attention: 1. The latest firmware is supported, and the current firmware is firmware v1.7.0 by default. 2. For certain functionality, like the world map, GPS simulator, and others, you need to prepare a PortaPack H2 and a FAT32 formatted -SD card over 1G. Up to 20 million samples per second 8-bit quadrature samples (8-bit I and 8-bit Q) For Radio, SDR , and the like Software-configurable RX and TX gain and baseband filter Software-controlled antenna port power (50 mA at 3.3 V) SMA female antenna connector SMA female clock input and output for synchronization Convenient buttons for programming Internal pin headers for expansion Hi-Speed USB 2.0 USB-powered hardware Colour:Photo Color Material:PCB Package Contents: 1 x radio development board 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.