Product Description
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Designed specifically for use with the A 4470/80 audio switchers, the addition of this microphone enables local paging to any zone or combination of zones. Paging to any zone may be inhibited by selecting the paging on/off function for all individual zones on the A 4480. Allcall emergency paging can also be initiated from each console.
The paging microphone may be located up to 100 metres from the A 4470/80 and all audio and control signals are carried via an inexpensive Cat5 or similar data cable. Up to 8 paging consoles may be used in one system.
Input and Output Operation
The system can be configured with up to 8 zone paging consoles, 8 local zone inputs, 1 emergency paging input, 1 alert/evac input, and 8 auxiliary audio source inputs. Each auxiliary input has selectable sensitivity - 0.3 to 0.7V.
Auxiliary inputs can be switched to any zone or combination of zones. Each auxiliary input has a volume, treble and bass control, plus a signal presence indicator. A programmable display indicates which input is selected to which outputs.
For remote selection of auxiliary inputs the A 4475 wallplate may be connected via Cat 5 cable to each zone (max 1 per zone). This wallplate enables selection of any auxiliary source, plus local level adjustment.
A local input wallplate (A 4478) can be placed in each zone for connection to a local mic or line audio source. This wallplate connects to the A 4475 program selection wallplate.
Tamper proof volume controls and signal presence indicators are provided for emergency paging and alert/evac signals. Closing contacts activate alert/evac signal.
Volume controls are provided for each output. All 8 outputs consist of 3 pin balanced line level XLRs.
Preset Operation
Six user presets are provided for recalling regularly used configurations. Presets one to four are user programmable and can be recalled at any time. Preset five is “last setting” prior to a preset being loaded. This is an easy way to revert to a previous system setting. Preset six is a backup of the initial system configuration. Presets may be selected from the front panel or remotely by the A 4476 preset selection wallplate.
Program Isolate
This function allows ‘blocking’ of selected RCA input audio sources to selected zones. This does not affect paging or tones.
Priority Muting Operation
A priority muting system ensures appropriate signals are routed to zones depending on the condition of the system. For example in emergency paging mode, all inputs, including alert/evac signals are muted for live emergency announcements through the paging microphone. In alert/evac mode all inputs are muted so that tones and recorded messages may be played in all zones.
When a local input is connected any auxiliary source being played in that zone will be muted.
In zone paging mode auxiliary signals will be muted for transmission to the selected zone. To prevent unwanted interruptions during functions or events, zone paging may be prohibited from the front panel via the PA on/off function.
