Tannoy TMA120 Operating Instructions Manual - page 8
8
APPLICATIONS
Retail Store Paging System
This application shows two TMA120s being used in a retail store paging system.
Channel #1 of the store TMA120 is set for input from the telephone paging line. The telephone system also
provides a paging contact closure which is wired to the Mute/Chime terminals. Channel #2 is set for input
from the line-level digital message repeater, and is assigned both as a priority channel and manual muting of -
20dB. Channel #3 is set for input from the line-level background music source, and is assigned manual and
auto muting of -10dB.
Channel #1 of the warehouse TMA120 is set for input from the warehouse paging microphone, which also has
a push-to-talk switch wired to the Mute/Chime terminals. Channel #6 is set for input from the line-level Pre
Out of the store TMA120 and is assigned manual muting of -40dB. Therefore, the digital message repeater
will automatically mute only the background music (-10dB), whereas, telephone paging will manually mute
both the background music (-10dB) and the digital message repeater (-20dB). These combined signals from
the store TMA120 are then fed to the TMA120 in the warehouse, where they are manually muted by any
warehouse paging (-40dB). Potentiometers are wired to the Remote Level terminals of both mixers, providing
remote control of store and warehouse levels. They are both set for 'xfmr' output and are connected to
70V/100V distributed speaker systems.
WARNING: THE ABOVE DIAGRAM SHOWS THE OUTPUT TERMINAL COVER REMOVED FOR CLARITY ONLY. THE COVER
MUST BE INSTALLED WHEN THE UNIT IS ENERGIZED.