Yes, you can set different audio input levels between HF and VHF and modes for USB/LSB, and DIG/PKT.
However, the radio user interface design is 25 years old, and reflects an era where AX.25 pkt on VHF/UHF FM, and RTTY or PSK(maybe) on HF were king. The radio menu settings have actions that aren't obvious.
Best documentation I've seen is in the Files section of this group:
/g/ft817/files/FT-817%20computer%20interface%20notes.pdfLots there, going back 20+years
73, hope this helps,
jeff KN8A
