College】 【weak sound system debugging method resolution --- Power By 【China】 weak home network..

<br> debugging is generally divided into sound engineering and sound system debugging debugging debugging here to tell us about the steps the system, the following system debugging steps that I generally use, and introduced to share. .<BR> <BR> 1, line check: according to the design, carefully check the connections, make sure there is no problem. .<BR> <BR> 2, set the initial state device, the amplifier input set to a minimum, all the input and output peripherals knob is set to 0 dB position or middle position. .In accordance with the previous level after level in order to power (first not the amplifier), check all equipment power is normal, to the amplifier power. .<BR> <BR> 3, the initial check system status: appropriate to open a large amplifier gain control, CD music in a familiar place, adjust the mixer input level to the basic normal position. .Slowly push the fader from the console a bit and listen to the voice of speaker is normally given to whether the distortion, if not properly checked off immediately. .<BR> <BR> 4, speaker and polarity detection system: the system is normal, turn on all equipment and power amplifier set at maximum level, pull down the output faders mixer, phase analyzer generator access to the mixer input .channel, turn the power to adjust the output gain phase analyzer and mixer input gain to the mixer instruction sheet is 0 dB. .Slowly push the fader from the console output, etc. issued by the speaker in the "pop" sound to achieve sufficient loudness (if the loudness is not enough, the test results are sometimes inaccurate), detected by the phase of each speaker to check whether the phase or .speaker described the same specification. .Detection best to turn off the other speakers, to prevent interference, one by one test is more accurate. .If there is not normal, check the speaker cable is reversed or whether the system cable inverted. .Turned or replaced after the test. .<BR> <BR> 5, phase adjustment: If you use ultra-low-and full-frequency combination, due to the presence of sub-frequency system and the installation position of the reasons, there may be cross-frequency interference or delay the phase caused by different problems, .So the need for phase adjustment. .Pink Noise (PINKNOISE) generator receiving input channel mixer, adjust the levels to the normal position, phase meter test on the pitch, microphone, and speakers into the triangle position. .Raise the mixer output fader, check the entire frequency spectrum analyzer screen with the subwoofer crossover frequency band near the valley point there does not appear. .If so, the corresponding band equalizer to enhance, if not up to enhance is the presence of phase problems. .Will directly affect the phase problem appears sound, but nothing resolved with the equalizer. .To solve the problem need to adjust the crossover phase of the phase angle or time delay between speakers. .Adjustment, note the spectrum analyzer display, the first frequency divider of the phase angle adjustment to see if there is no improvement, if there is improvement, determine the best value and then adjust the delay time, delay time adjustment depends on site conditions .If the subwoofer from the seats near to delay the need for regulation to do the bass, is also watching the spectrum analyzer screen, adjust the delay time for the curve as flat point. .Phase to minimize the interference. .<BR> <BR> 6, frequency equalization: After doing the above regulation, you need to adjust the system frequency response curve. .Spectrum analyzer to test the microphone on the seat to a location within the region, play pink noise source, watch the spectrum analyzer display, on the defective parts, using the equalizer correction. .Then test the microphone into different places, and then in turn transferred balance, change a few more positions, repeatedly adjust the equalizer to the frequency response curve of each region are as straight, even if the general tone equalizer good. .<BR> <BR> 7, dynamic control device regulation: General Dynamic conditioning is a pressure limit, pressure limit if it is chained thread in the system are generally used as a protection system, so the key is to use pressure .limiter clipping function. .Limiter settings I usually do this: pressure limit is set to direct (BYPASS), input and output gain set to 0 dB, the compression ratio is set to "infinity", and then send pink noise signal mixer, and gradually push the large, observed .amplifier's input level indicator lights when clipping (CLIP) lit. .Access Compression, adjust the knob to start the level, the amplifier input clip indication off. .Then increase the mixer output by 6 dB or so that the output level indicator to +6 dB, and then start adjusting that level, so that amplifier clipping LED flashes to the beginning. .<BR> <BR> Point, system debugging is complete, as for sound regulation and effective treatment (including the effects, actuators, etc.) are generally the task of the tuner. .Of course, sound engineering, which is normally provided by the company's technical staff to do sound. .<BR>.