【 Weak current College 】 mixer level adjustment method resolution

(1) input level adjustment
Adjust the input level, preferably not and speaker connections, first with the headset connected mixer headphones Jack, listens to the output of audio signals, and then set the left and right master channel fader potentiometer to minimum, gradually pushing up until you hear the input signal, you are ready to listen.
When all the sources are connected properly, the system opens, adjust each channel reception sensitivity, first, to set the input channels of the lowest sensitivity, and is then slowly increase. By: first Attenuator (PAD) switch is placed ON Office, will gain (GAIN) as-20dB, faders attenuator placed in 5-10 scale, the first channel of the sound source (CD player, LD machine or vocal, musical instrument sound, etc) to the actual playing maximum volume Express, observation overload monitor, if the display lights up, the output signal level audio sources should be reduced.
In General, you should increase the input gain adjustment (GAIN) to its optimal level until the peak overload indicator just in maximum peak is shining on it. But if the gain control (GAIN) all the way up, the peak indicator is not lit, at this point, you can put the gain button to minimum, buffer PAD to OFF, then slowly open the gain control until the display lights shining peak; if the light is not lit, you should check the wiring is correct.
In addition, when peak overload monitor display, the level distance overload peak also poor 3dB. In the play, display in the audio signal of loud Office briefly flashing it is normal to do good, and the adjustment of the level signal level is desirable. But if the monitor frequently brilliant, the signal level (or a mixer gain) is too large, should be suppressed.
(2) after a channel to adjust
The faders attenuator pushed all the way to the small office, and then adjust the other channel, you can prevent the previous channel noise another channel adjustments. When all the channels are adjusting well to the left and right master channel faders Attenuator is placed minimum location, turn off the sound mixer and then with the speakers are connected, open a mixer; then you can set the master channel faders attenuator gradually pushing up to adjust to an appropriate level of action.
(3) for input level adjustment also note matches
When individual adjustment input level match will not be able to connect the speakers, headphones signal, then the master faders can be located on the minimum level, and slowly increase the output level up to feel fit. When all of the sound source connected before you can open the entire system. Here each signal input sensitivity of match is very important for each channel separately.
(4) channel faders and master faders attenuator using
Channel faders position, mainly depends on the adjusted settings general channel faders has the best coverage in the range audio signal with minimal noise and distortion, and maximum adjustable resistance. The EMX series products, the range in the faders of the 5-15 between ticks.
(5) when determining the input when the master faders
It also should be aware of the VU level meter display. VU-meter readings does not exceed OVU scale, higher than this number, description of the level is too high, the power amplifier will arise as a result of overload distortion. It is necessary to pay attention to any one input channel level changes will affect the overall output level. When the final regulation master faders to small step, but if the master faders cannot be set at an appropriate scale of high and low (less than or equal to 20 or greater than or equal to 5), channel input level is not adjusted well, need to be adjusted until the master faders to push in the right location, VU meter with appropriate instructions.