User guide

DCM-1 User Manual v1.0
Conguration
42
Select Emergency Source
Rotary:
Buttons:
selects paging method
select Input (Mic or Line)


An external emergency mute applied at the Music Mute rear
connector will normally mute all eight Music Inputs and all
four Microphone Inputs. Paging remains operative. Some
installations may require that one input is reserved as an
emergency audio input, for a Fireman’s Mic or Emergency
Evacuation message. The EMERGENCY SOURCE menu
function determines which input this will be.
Any input may be nominated as the emergency source.
Either a Line or Mic Input may be chosen, making it possible
to interface either microphones directly or line-level devices
such as sound stores.
The rotary control selects the input to be used for
emergency access. Turning the control clockwise scrolls
through Line 1 to Line 8, then Mic 1 to Mic 4. If the Music
Inputs have been renamed, the names are displayed. The
default setting is Off. The menu function can be exited when
the required input is displayed; no additional button presses
are necessary.
Once an input is selected, that input will remain live when
Music Mute is active. With the default setting of Off, all
inputs will be muted when Music Mute is active.
The numeric buttons are not used in this function.
Emergency Level
Rotary: sets level


Any emergency messages routed through the system using
the Music Mute/Emergency Source outlined above should be
at a higher volume that normal music programme material.
(This is likely to be a requirement of Statutory Regulations).
This menu function allows adjustment of the audio level
of the Emergency Source (see above) when Music Mute is
active. It applies only when a Line Input is assigned as the
Emergency Source.
The default setting is maximum, but if this level causes
problems with system overloading and inadequate
intelligibility, it can be reduced with the EMERGENCY LEVEL
menu function.
Turn the rotary control anticlockwise to reduce the level.
The relative level is shown on the display as a bargraph.
The numeric buttons are not used in this function.
Congure Music Mute
Rotary: selects NC or NO


The Music Mute input’s trigger mode may be congured as a
pair of normally-open (NO) or normally-closed (NC)
contacts.
The rotary control selects either Normally Open (the
default setting) or Normally Closed.
Set the function required by the emergency system being
interfaced to. Select Normally Closed if the external
equipment maintains a short-circuit in place at the Music
Mute connector pins, removing it only when an emergency
condition arises. Select Normally Open if the external
equipment signals an emergency condition with a contact
closure.