In rig I use (857) I must select DIG mode. I don't know if hamlib is
capable to transfer this MODE type to tlf.... I'll check.
I use fldigi for everyday psk operation but I did not yet find the way
how to thether/operate fldigi psk modes with tlf.
(also I must exit tlf because it interferes with fldigi while operating
digimodes)
I only know a bit that tlf does know what is RTTY mode, but I suspect
it knows nothing about PSK63, PSK125 etc.
So I use tlf for CW/SSB log and fldigi log for PSK modes alias...