Ideally, this decimation factor should be an even number. The sampling rate must be an integer decimation rate of the MCR. There are two master clock rates (MCR) supported on the X300 and X310: 200.0 MHz and 184.32 MHz.
The Ettus Research USRP X310 is a high-performance, scalable software defined radio (SDR) platform for designing and deploying next generation wireless communications systems.
26 Guidance on 10Gb SFP+ to RJ45 Adapters.25 Guidance on SFP+ Adapters for Fiber Connectivity on USRP X300/X310.22 Option: General Purpose Input/Output (GPIO) Kit.20 Option: GPS Disciplined, Oven-Controlled Oscillator (GPSDO).