I also notice if I change something else on the PC it can make the IC-7600/WSJT-X fail. I tried going into the USB settings on the PC in Device Manager, Power Management and disabling sleep mode. Going into WSJT-X setup screen, configuration, and pressing “Test CAT Control” seems to fix the issue til next time. It wakes back up when the pc and the radio are awake but CAT fails anyway. Note that CAT stops working when the USB goes into sleep mode. Remember we have to use CAT because VOX is not connected internally by ICOM. Here are screen snaps of how I did it.Ĭhange all the “Data” fields to USB on the IC-7600 and the audio is taken care of. PTT using vox does not work with USB because Icom does not feed a decoded audio stream from the USB chip to the vox circuit. The IC-7600 reportedly uses a Silicon Labs CP210x) (Note the USB chipset in the IC-7600 is not the TI PCM2900 series with it’s known audio level bug. I just googled the name in device manager to find it. It should have loaded the driver automatically but I had to download a driver manually to make it work. Step one is to make sure the PC recognizes the IC-7600 usb hardware in device manager. Audio both ways over the USB is straightforward and PTT over USB is easy if you’re willing to use CAT. Some of the blogs discuss the challenge of configuring the IC-7600 and WSJT-X for operation using a USB cable.
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