Controls, Master Control Section | Nilfisk-ALTO CLE8.0 specification

2.1.4More about noise: Expanders and Noise-Gates

A lot of instruments such as microphones, amplifiers, guitar pickups, etc generate some noise, either at low fre- quencies (hum) or at high frequencies (hiss) Such noise will inevitably interfere with the quality of your audio signal. Now, if you scream into a microphone you will not hear the noise generated by such microphone because such noise will be "masked" by the higher level of the signal, your voice in this case.

But if you sing into your microphone more gently in a soft passage, the level of the signal generated by your voice will get much closer to the floor noise level and such floor noise will become disturbing. In order to kill this problem Expanders and noise-gates are used. An expander is the opposite of a compressor: attenuating the signal when the amplitude drops they can limit the floor noise.

Now, we do not need dramatic expansion of a signal across the range, This would generate a resulting dynamic range of over 150dB. For this reason the amplitude control will be applied only to those audio signals which are below a set threshold. Those audio signals above the set threshold will not be affected. Noise-gate can be regarded as a simple Expander. But the Expander will attenuate the audio signal continuously below the set threshold while the noise-gate will simply dramatically cut-off the audio signal completely.

2.2Voltage Controlled Amplifier (VCA)

The VCA is the soul of the CLE 8.0 and it is one of the best components available today in his category thanks to its exce- llent performances in terms of distortion, linearity, noise and temperature stability

2.3Inputs

2.3.1Take it easy: Balanced Inputs

To make your life easy and clean we have provided CLE 8.0 with electronically balanced inputs. Even if you operate at high signal levels, hum and noise will be reduce automatically. There is also a servo-function that will automatically adjust the internal level when unbalanced connectors are detected. The correction if of 6dB and it will avoid differences in level in between input and output signal.

3.CONTROLS

SMART	SMART
SMART	SMART
SMART	SMART
SMART	SMART

Pic.1: Front Panel of The CLE8.0

The CLE 8.0 presents with 8 channels. Each channel is equipped with the same control elements: 6 push-button switches, 8 rotary controls and 22 LEDs except channel 1 which short of the LINKCH1 push-button only.

3.1 Master Control Section

GAIN REDUCTION(dB)

	30	25	20	15	10	6	3	1
IN/OUT LEVEL(dB)
	-24	-18	-12	-6	0	+6	+12	+18
	SMART	SC FILTER		IN/OUT METER		BYPASS/COMP
	SOFT				INPUT		COMP

GAIN REDUCTION(dB)
	30	25	20	15	10	6	3	1
IN/OUT LEVEL(dB)
	-24	-18	-12	-6	0	+6	+12	+18
LINK CH1	SMART	SC FILTER		IN/OUT METER		BYPASS/COMP
LINK ON	SOFT				INTPUT		COMP
7	6		5		4		3

Pic.2: The Master Control Section