Looking at most (all?) VHF/UHF rigs that have a data port, there's one TX_AUDIO pin for 1200 bps and a different one for 9600 bps. I understand that to get 9600 bps, the transmission audio signal needs to be delivered directly into the transmitter varactor diode (quoting from g3ruh's paper) rather than into the microphone input. This seems to suggest that to switch from 1200 bps mode to 9600 bps mode, I would need to switch cables or use a homemade switch box. What would happen if I were to send 1200 bps audio in through the 9600 bps pin?