I followed the instructions here to flash this OS to a Red Pitaya and connect over ethernet. After inserting the SD card, connecting the ethernet cable and power, the Red Pitaya enters a reboot cycle, as indicated by the periodic turning off and on of the blue LED and the following red and orange flashes. The steady green light tells us there is no power issue. This info about the LED indicators was found on this FAQ, which suggests the rebbot cycle is due to a missing external clock signal.