Control is done by means of an RS-232C connection to a four pin RJ11 modular jack on the back of the unit (an adapter to a standard DB9 connector is supplied by Broadcast Tools with the unit). Serial port speed on the SS 4.2 should be set to 9600 (DIP switches SW13-3 and SW13-4 set to 'off'). Serial port parameters in RDAdmin should be set to 9600 baud rate, no parity, 8 data bits, 1 stop bit, CR/LF termination.

The SS 4.2 should be configured to use 'Mix' mode --i.e. DIP switches SW13-5 and SW13-6 should both be 'on', and the unit ID should be set to '0', with DIP switches SW13-1 and SW13-2 both 'off'.

Operation in 'multidrop' mode is not supported. If you wish to use GPI (referred to as 'PIP', for 'Parallel Input Port' in the Broadcast Tools documentation), then you will also need to be sure that DIP switch SW13-7 is ON.