What voltages can I use on the Tau2 and Quark2 serial port?

Tau2 and Quark2 cameras can accept 5V logic levels on the serial port input interface without any problems. Full RS-232 voltage levels can also be used directly. The cameras will only transmit with 3.3V CMOS logic levels. The Tau2 cameras will automatically detect and use the correct `sense` between digital serial signals and (logically inverted) true RS-232 signals.