It’s a “re-clocker”. The unit has its own clocks so it does not rely on the jittery RPI clocks
It’s galvanically isolated. The clean board is isolated (ground and signals) from the dirty side
It needs 2 PSUs, one for 5V/2A-3A (RPI) and a second power 5V to 6V 100mA. We do recommend the cleanest power supply possible (batteries, linear but even a good SMPS will work)
Old driver is compatible for both units (chose DigiOne on your favorite player)
Measured jitter has decreased further, less than 400fs (tested at buffer)
Output is coaxial/BNC and rise/fall time is 1ns and voltage level is exactly as per guidelines (550mV on coaxial) measured at end of transmitting cables