The CDA-2990 helps you synchronize systems that include USRP Software Defined Radio Devices. It accepts both external 10 MHz and pulse-per-second (PPS) input signals and amplifies and distributes the signals to eight output ports. The CDA-2990 is available in a configuration for distributing externally supplied signals. You can also choose the GPS-disciplined oscillator (GPSDO)-enabled option, which integrates a GPS-disciplined oven-controlled crystal oscillator (OCXO) that generates the 10 MHz and PPS signals internally.