Nilfisk-ALTO ACL2 Pro Air Compressor User Manual


 
5. 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.
6. Threshold LED
These LED's will show you the state of the input signal in relation to the threshold level. If the input signal
falls below the set threshold level the left "-" LED will light up. This means that no signal is being compressed.
If the input signal rises above the set threshold level, this signal will be compressed and the SKC level will be
shown by the middle "0" LED.
7. 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 :1.
8. Attack Control
This control determines how fast the compressor is to respond to audio signals