Yaesu FT-891 Advance Manual page 66

DATA (PSK) Operation
Software Settings
r There are many good Data Mode Operating Software programs available on the in-
ternet. Each of these programs will have their own Setup instructions. The following
general information is common to most software application setup:
COM PORT Settings
To start set the Com Port setting to the Enhanced Driver. If there is a problem switch
to the Standard Driver.
PTT Settings
Set the PTT to RTS on DTR off.
Soundcard
At the software Soundcard Volume setting, increase the volume to about 70% to start.
r If the soundcard volume setting is too low, the radio will not switch to Transmit.
66 FT-891 Advance Manual