TOA bg-115 用户指南
7. MUTING FUNCTION
Announcements made using the Mic/Tel input take precedence, decreasing the sound volume of all current
broadcasts from equipment connected to the Program or AUX input. The interrupted broadcasts are
automatically restored gradually after Mic/Tel input announcement completion. Use the sensitivity control to
automatically restored gradually after Mic/Tel input announcement completion. Use the sensitivity control to
determine the threshold value for muting. Turning the control clockwise increases the sensitivity, while the
counter-clockwise rotation decreases the sensitivity.
counter-clockwise rotation decreases the sensitivity.
When operating an external muting function (muting from the terminal block), short the muting terminals of the
terminal block on the rear panel. Signals to the AUX input and Program input are muted. Turn the sensitivity
control fully counterclockwise when using this function.
terminal block on the rear panel. Signals to the AUX input and Program input are muted. Turn the sensitivity
control fully counterclockwise when using this function.
The BG-115 (BG-130) is set to mute the AUX and Program inputs by the
factory. To mute the Mic/Tel input instead of the AUX/Program inputs, change
the position of the jumper on the internal circuit board.
factory. To mute the Mic/Tel input instead of the AUX/Program inputs, change
the position of the jumper on the internal circuit board.
Important: This change must be made by an authorized electrician.
Factory-setting
8. MIC/TEL INPUT IMPEDANCE SELECTION
The Mic/Tel input impedance selector switch is set to 10 k by the factory.
To change the setting to 600 , set a jumper on the internal circuit board to
To change the setting to 600 , set a jumper on the internal circuit board to
600
.
Important: This change must be made by an authorized electrician.
Factory-setting
9. JUMPER WIRE SETTING
The amplifier is set by the factory to send AUX and Program inputs to both the output terminals and MOH
output terminals. This setting can be changed as shown in the table below by cutting JP202 and JP203
jumpers on the internal circuit board.
Cut of JP202
Cut of JP203
Output terminal
Outputs only the Program input.
(AUX input is cut off.)
Outputs both AUX and Program inputs.
MOH output terminal
Outputs both AUX and Program inputs.
Outputs only the AUX input.
(Program input is cut off.)
Factory-setting
JP202
JP203
Important: This change must be made by an authorized electrician.
10. OPERATION
After completing all connections, turn on the power switch, and check to confirm that the power indicator
lights.
Note : When the heat sink temperature exceeds 105°C, the protection circuit begins to operate to disconnect
the output from the circuit. The disconnected output is automatically restored as soon as the
temperature returns to the normal operating range.
temperature returns to the normal operating range.
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