DigiMaster MiniPro Digital DATA Interface.

USB Computer-Radio Interface for PSK31 and ALL otherAFSK DATA modes.
Ham radio DATA interface supports ALL AFSK data mode software. HRD, MixW, Digipan,Easypal etc.
Supports ALL AFSK DATA modes, inc psk31, sstv, rtty, contesia, olivia and dozens of others.
You can also use the interface remotely over the internet and/or allow remote users acces to DATA modes and remote voice operation via the interface. Remote PTT software for the interface can be downloaded here.
No possibility of any ground loop