This channel is common to all mixing consoles and provides a digital and analogue output from the PGM mix bus. The digital output is available as a balanced AES/EBU signal via a standard XLR or as S/PDIF on phono sockets. The balanced PGM analogue output and mono output are on a 15-pin D-type connector. This also includes the two sets of latching relay contacts for control room mutes.


The main power supply for the S2-PSU is on this channel. The buttons at the top of the channel allow selection of the mono output source between PGM or AUD. The compatible mono output can be used to feed a mono transmitter or any station output monitoring system requiring a mono signal, such as a background music system.

The digital output status bits (consumer or professional), output sample size (16, 20 or 24 bit) and sampling frequency (automatically or by internal jumpers from 32 kHz to 96 kHz) can be configured. The digital output can be synchronised from an external input, or from a built-in master clock. There are 4 different synchronisation modes: Master, Auto, Auto Lock and Slave.

The illuminated LOCK LED indicates that the digital output is locked to the built-in master clock, incoming word clock or AES/EBU or S/PDIF sync signal. The channel automatically locks to a valid sync clock, flashing if sync is lost. Synchronisation can be disabled by jumper.