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SX-ST / SX-SV User Manual page 17
4.16 On Air signaling ( SX-VT serie only )
ON AIR signaling is available on each input channel and can be enabled with Dip switch S5-B. The On Air
signalisation is turned On or Off by moving the Fader up and down, providing that the channel is turned ON.
The ON AIR Led on the Master module will light On and Off accordingly, and a ON AIR logic command is
available on the "Remote and Signaling" 25pin Sub-D connector.
When ON, a +3,3VDC voltage is available on this connector. Please take note that a maximum of 20mA can be
drawn on this comand which is only foreseen to drive a low power external device such as a relay or an
optocoupler system. Usually it is that external system that will drive the ON AIR lamps in the control room and
the studios.
4.17 MUTE function
a MUTE function can be indidually enabled on each Mic/Line input module ( with or without VCA ) with Dip
switch S5-A located underneath the channel fader.
As soon as any "Mute enabled" channel is turned ON and its channel fader is ON, the MUTE Led on the Master
module will turn ON, indicating the the Mute function is activated, and the control room volume will be
attenuated by 20dB.
The Mute function can also be activated by toggeling the On/Off button, providing that the fader is moved up.
This function is used by DJ's and operators that need to talk into the program material to avoid feedback trough
the control room loudspeakers