Nilfisk-ALTO BK 2.0 - Manual (Page 8)

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2.Close LED
This LED illuminates when expansion occurs.
4 5 6 8 7 9 3 10
Pic.3: Controls of the Compressor/Limiter section
COMPRESSOR / LIMITER
THRESHOLD RATIO ATTACK AUTO RELEASE OUTPUT IN/OUT
dBu n:1 ms dB
EFFECT IN
-40 +20
+10
-20 0
-10
1 LIM
1.5 8
2 5
2.5
0.1 200
1 150
10 100
50
50m 4
0.1 2
0.3 1
0.5
-20 +20
-14 +14
-6 +6
0
ENHANCER
PROCESS
OFF 6
1 5
2 4
3
30 20 15 10 6 4 2 1
CH1
CH2
AUTO CH1 IN AUTO CH2 IN
GAIN REDUCTION (dB)
sec
3.2 Compressor Section
Engage this switch to activate the corresponding channel. It can be used to make an A/B comparison in be-
tween processed and unprocessed signal.
3. EFFECT Switch
4. THRESHOLD Control
This control adjusts the threshold level for the Compressor section in the range of -40dBu to +20dBu. The SKC
(Smart Knee Control) is applied to the audio signal, which is a maximum of 10dB above the set threshold.
Above such level (10dB) a hard knee compression will be applied.
5. Ratio Control
The ratio between the input and output level of audio signals exceeding the set threshold level is determined by this
control. This control is manually adjustable from 1:1 to LIM:1.
6.Attack Control
This control determines how fast the compressor is to respond to audio signals that will exceed the set threshold. It can be
manually adjusted from 0.1 to 200 milliseconds.
7. Release Control
This control determines how fast is the compressor to return to unity gain when the audio signal falls below the set
threshold level. It can be manually adjusted from 0.05 to 4 seconds.
8. Auto Switch
Who needs Attack and release control? Activate this switch and these controls will be deactivated. Attack and release
controls will be automatically set by the unit depending on the program material.
9.Output Gain Control
Through this control you can vary the output signal by a maximum of 20 dB. In this way you can recover a level
that had been lost because of the compression process.
10. Gain Reduction Meter
It indicated the gain reduction. The range displayed is 1 to 30 dB.
3.3 Dynamic Enhancer Section
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Pic.4: Controls of the Dynamic Enhancer section
ENHANCER
PROCESS
OFF 6
1 5
2 4
3