I am using the IC-7200 USB Interface for Ham Radio Deluxe and the digital modes work fine.
WSJT will not key the IC-7200 via the IC-7200 USB port!
The reason for this is that WSJT does not generate CAT Commands. WSJT outputs its PTT Command only to a Serial Port.
The only way that I can get WSJT to play with the IC-7200, (via the IC-7200 USB port) is to manually provide the PTT by pushing the microphone PTT button.
VOX does not work because the IC-7200 VOX circuit does not receive the Analog Audio coming from its USB Port D/A Converter. The input to the VOX is only via the Microphone Port.
Pushing the Mic PTT button every time WSJT transmits is a pain, but will work in a pinch. (I had a JT6M contact operating this way)
I am using a SignaLink USB compuer to IC-7200 interface unit.(www.tigertronics.com
)The computer connects to the SignaLink USB via the computer USB Port. The SignaLink USB connects to the IC-7200 via the 13-Pin ACC Connector. The SignaLink has a built in PTT Relay, which is activated by the incoming WSJT Transmit Audio.