The validation of this approach required the development of a node prototype for clock distribution based on the DPLL AD9545, digitally controllable through a microcontroller. The clock distributed by this node was provided to anchors, based on modified EVB1000 boards, in order to accept an external clock source.
The experimental characterization showed that the phase error of the clock thus generated is higher than 9.3% vs. a star topology but still within the design limits. The use of a standard system with wired protocol (IEEE1588-HA, aka White Rabbit) also allowed to simplify the management of the chain topology. However, it required the use of a frequency multiplier (DPLL AD9545) to make the frequency of the clock distributed by the White Rabbit network compatible with that required by the UWB anchors.