Allen&Heath Scepter USER GUIDE - Manual (Page 28)

Audio Owner Manual Section 3
Monitor Select and Level
This section selects the signal for the HEADPHONE OUTPUT on the front
panel and the MONITOR OUTPUT on the rear panel. It also routes the selected
signal to the LED Meters. If no switches are selected (and no PFL LED illuminated),
this signal is the LEFT/RIGHT output of the console. When a monitor select switch
is depressed, it routes the selected signal to the Meters, Headphones and Monitor
Output. The
control sets the volume to the two outputs, but has no effect on
the meter. In the event that multiple switches are selected, the switch closest to the
BOTTOM of the panel has priority. When any PFL switch is selected, the PFL ON
LED will illuminate and the
signal will override the selected monitor signal;
multiple PFL switches mix together. When all PFL switches are released, normal
monitoring resumes.
Headphone Jack
Accepts stereo headphones of 75 ohms or greater. Output source and level as
described above.
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