Successfully transfering files between 48SX and 50G

[Steve Simpkin]

(11-30-2018 10:04 PM)SammysHP Wrote:  Is the output of the 50G really RS232 (inverted and +/- voltage) or just TTL (not inverted and only positive)?

I don't know for sure about the RS232 levels on the HP50G. The HP-48SX puts out approximately +/-3 Volts on its RS232 output so I *suspect* the HP50G must do something similar to be compatible with other RS232 computers and devices.