Hello Marcello,
We actually tested the Rs-232 Locobuffer of Hans Deloof and I think there some users using an Usb-Locobuffer.
In our tests we always used digital central stations from Uhlenbrock because they are the Most common one in Germany. We ourself do not own a Digitrax Station.
But I think it shall work, because all systems should behave the same way regarding the Loconet basics.
But we can give no gurantee.
Regards
Markus