The only interface between the radio and my laptop is a single USB cable. This allows for full control of the radio and takes advantage of the sound card built into the radio.
For what they’re worth, here are my menu settings where they are different from the default:
Menu 038, CAT rate: 38400 (must match how the COM port is set)
Menu 065, PC Keying: RTS (again, must match the digital mode software on the computer)
Menu 067, Data Mode: Others (means it doesn’t force PSK-31 mode, and allows any soundcard mode)
Menu 069, Other Disp (SSB): 1000 (allows the receiver to display data mode frequencies correctly)
Menu 075, Data In Select: USB (this means using the USB cable instead of RS-232)
Menu 076, Data Mic Gain: 25 (though I use 15 for fldigi – depends on the software)
Menu 077, Data Out Level: 10 (again, dependent on software)
Menu 116, HF PSK Shape: Soft
Menu 117, HF PSK Slope: Gentle
All other digital mode settings are at their default setting.
I welcome any suggestions!