Optimus MX-88 Installation And Operating Instructions Manual page 24

8x8 audio matrix
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(10) PAGING MIC INPUT / RECORDING MIC INPUT
An input jack to connect a Paging MIC. It is recommended to use a balanced MIC.
(11) PAGING MIC LEVEL CONTROL / RECORDING MIC LEVEL CONTROL
This potentiometer allows to adjust broadcasting and recording built-in DRP IC output level.
(12) TALK BUTTON
You can start broadcasting by selecting the desired area and pressing and holding the
TALK button when performing Paging MIC broadcasting. In this case, character "P" is
displayed on the BGM input channel display. You can terminate broadcasting by releasing
it, and the selected zones are released.
(13) PAGING ZONE SELECTION BUTTON
Press these buttons to select the zones where you want to broadcast.
(14) REC BUTTON
It allows to record an audio message that can be activated by alarm contacts.
(15) BGM INPUT LED AND BGM SOURCE LABEL
This LED indicates that signal is present in the corresponding input.
(16) MASTER/SLAVE LED
Displays mode in link of MX-88. This turns on depending on the status of the rear System
Mode switch.
(17) POWER SWITCH
MX-88 Version 1.0
MX-88
AUDIO MATRIX 8x8
Page 5 of 18

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