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7.
The Paging output is limited to a nominal 70 Volts rms by the ALC.
In a properly designed system, sound loudness is normally adjusted
by selection of appropriate speakers and their individual tap settings
for a 70 Volt input. However, circumstances such as a long term
change in ambient noise may call for reducing the loudness of all
speakers en-mass. This output level can be attenuated by an overall
AmpliCenter output level control setting. This setting is accomplished
remotely from any host system phone that dials DTMF.
Dial the paging access code.
When you have cut-thru, dial [#] [#] [#] [#] followed by:
DTMF digit
8
7
6
5
4
3
2
1
Output Attenuation
0 dB
–3 dB
–6 dB
–9 dB
–12 dB
–15 dB
–18 dB
–21 dB
NOTES:
When used, the PagePac Plus Controller must be configured to pass DTMF
signals to that zone in order for this to work. Also, MERLIN multi-button sets
require pressing [#]
twice for every # sent; therefore a string of eight [#] s must
be pressed before the level setting digit is registered.
The DTMF tones will be heard from the loudspeakers during this adjustment.
The setting is retained in the Controller memory during power black-outs for 24
hours minimum, 1 week typical.
The maximum AmpliCenter power rating is reduced by the attenuation level; i.e.
total speaker load impedance may not be less than 250 ohms for the D20, 50
ohms for the D100, or 16.7 ohms for the D300.
The 0dBm output is also attenuated proportionally to the 70V output.
8.
Adjust Music Ducking level. This feature allows music to continue to
be heard during a Page, but at a reduced level. The range is from
less than -40dB (full CCW) to -6 dB (full CW).
3-14 Installing the Hardware