4
CHART 1
SW
4
3
2
1
SETUP
ON
NORMAL
OFF
SETTING ADJUSTMENT RANGE
2 OFF 3 ON = 30dB 2 ON 3 ON = 15dB
2 OFF 3 OFF = 60dB 2 ON 3 OFF = 45dB
INTERNAL MIC ON
INTERNAL MIC OFF
*
DEFAULT SETTINGS
V-9933A
NOISE SENSING VOLUME CONTROL
DIP SWITCH SETTINGS
*
*
*
Microprocessor
Page Level LEDs
Binary code displayed
by LEDs will change
with change in
ambient noise.
Power Input
Microphone
DIP Switch
Sensitivity
Adjust
Ext Mic Page In Page Out
+/GND
-24VDC power supply
Audio source input
Audio output to speakers
-24VDC
4
3
2
1
ON OFF
D1
D2
D4
D8
Audio Sensing LED
D9
FIGURE 1
