3Play 4800 has an additional tab in the Output Configuration panel. The Aux pane provides control over the third primary video output section on 3Play’s rear panel, referred to as the Aux output. The video stream it displays is determined by the Channel Delegate active on the Control Surface at the moment. Video from the delegated channel is also sent to Aux. In the Aux control tab you will find a menu offering the same analog connection type options discussed back in Section 3.7.1.
For more information please download the entire document at http://new.tk/rt-m3p