UR824: Synchronous or Asynchronous USB?

One question regarding UR824 USB port implementation:
Is the USB input of UR824 synchronous or asynchronous?
I mean, is the data clock from computer USB re-clocked by the UR824 low jitters clock, or not?
For example, if I route the DAW output to the ADAT / SPDIF optical output, the clock frequency of the optical signal would be originated from the UR824 clock, or from the DAW computer clock?

Thanks! :wink: