ADC Sound Shaper Three - Check Point for each LED Meters

OSCILLOSCOPE
Step 5. Set Calibrator at -24 dB point.
Adjust VR805 (left) for -12 dB on left LED Meter.
And VR806 (right) for -12 dB on right LED Meter.
Both LED's should be lit. (Figure 10C)
Step 6. Set Calibrator at -25 dB point, check that both -12 dB on left and right LED have
turned off. (Figure 10D)
Step 7. Set Calibrator at -12 dB point.
Adjust VR803 (left) for 0 dB on left rED Meter.
And VR804 (right) for 0 dB on right LED Meter.
Both LED's should be lit. (Figure 10E)
Step 8. Set Calibrator at -13 dB point.
Checkfor both OdB points. Left and right LED haveturned off. (Figure 10F)
Step 9. RepeatSteps3 through 8 for optimum performance.
NOTE: Refer to Check Point for eachLED Meter below:
CHECK POINT FOR EACH LED METERS (SeeFigure 10 and Figure 10A through 10F.)
LED Meter point
-12 -10 -8
-6
-4
-2
0
+2 +4
+6 +8 +10 +12
dB
dB
dB
dB dB dB
dB dB
dB dB dB
dB dB
Calibrator position for
-24 -22 -20 -18 -16 -14
-12 -10
-8 -6 -4
-2
0
eachLED that is lit.
dB
dB dB dB dB dB
dB dB dB dB
dB dB dB
Calibrator position for -25 -23
-21
-19 -17 -15 -13 -11
-9 -7 -5 -3
-1
eachLED that isnot lit. dB dB dB dB dB dB
dB dB dB dB
dB dB dB
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