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How to debug the conference sound system? Steps and precautions for debugging the sound system


For professional audio engineering, the types and quantities of equipment included in each system are relatively large, and the use methods of various equipment and the working modes of the system are different, so the equipment debugging of the system is also different. However, due to the different engineering types, it is too long to introduce the equipment debugging methods of all types of projects one by one, therefore, we will only explain the steps of equipment debugging in the later stage of general engineering.

The first is the preparation before debugging. The debugging of sound engineering is a work that requires both technology and experience, as well as serious and responsible spirit. When the design, selection, layout and construction meet the requirements, the debugging of equipment and systems is the only means to meet the design requirements, so adequate preparations should be made before debugging.

These preparations include: preparing necessary instruments and tools, such as phase meter, noise generator, spectrum analyzer, sound pressure meter and multimeter required for sound debugging; Prepare all engineering design and construction drawings; Carefully read the installation and operation instructions of all equipment, and prepare the operation instructions of important or special equipment for standby. What needs to be prepared is that there must be no irrelevant personnel on site before the debugging work starts, avoid interference with debugging work.

Secondly, check the installation and connection of the equipment according to the design and layout requirements. Different from the construction steps of the project, the thinking of checking the installation and connection of the system and equipment in the equipment debugging stage is based on the outline of the whole system. The purpose is also to find problems, and it is easy to find problems. Therefore, it is necessary to check before debugging. At the same time, during the inspection, the construction personnel should be asked whether there are any problems left over during the construction process, make sure that there are no problems with the power supply lines and voltage.

Furthermore, all devices are set accordingly. Because the composition of the equipment of each system is different, the working environment of the equipment is different, and the signal processing and transmission methods of each system are also different, the significance of setting is to make the equipment work in a reasonable state, so that the coordination between the equipment, Control has a good foundation.

The setting of the sound system includes: the voltage range of all equipment should be set to the power supply voltage and one gear as high as possible; The signal transmission level value of the system should be set as consistent as possible to ensure the same reference point of signal transmission. The working state of the power amplifier is stereo, parallel mono or bridge mono, the protection state is not set, the selection of input transformer, etc.; What is the frequency division method of the speaker, where is the high frequency attenuation position? Signal input attenuation and signal grouping of the mixer; How to select the gear of peripheral equipment, whether to bypass, whether to link, whether to activate, etc.

The setting of the lighting system includes: the setting of the working voltage and signal voltage of all equipment; The setting of the lamp model to be controlled in the specific control equipment; In digital signal transmission, the coding form of the signal is set, and the address coding setting of the receiving equipment is set; The optical path position of all lamps or actions on the light adjustment platform is determined, and the function key setting on the computer lamp is set.

The settings of the video system include: the setting of the working voltage of all equipment; The setting of the signal color system, the setting of black and white balance and shooting illumination on the video recording equipment; The selection of the signal receiving mode of the projector, the selection of the projection, display mode and size, the setting of the three-color superposition effect, etc. In short, the equipment setting of each system in the project is a very important work, which should be carefully checked and carried out, and the corresponding instructions should be read when necessary.

The following is a separate operation check for each device in the system. The significance of this step is that from the separate equipment operation inspection, we can gradually check the signal transmission, check the separate working condition of the equipment, and prepare for the normal operation of the system to achieve a better sound, light and image quality.

In particular, there are many equipment in the sound system, and the relationship between the equipment is relatively close. The operation of individual equipment can focus on the level, gain, balance, phase and unblocked of the signal for more detailed, accurate and targeted adjustment to ensure that the previous equipment provides the best signal for the lower level, and finally makes the signal of the system in good condition. At the same time, the significance of checking the operation of the equipment alone is that the operation of the equipment alone can clearly know whether all the equipment is working normally and stably. Once there is a fault, it is convenient to handle and will not endanger the safety of other equipment in the system. Therefore, you must be careful and patient when carrying out this step of work, and it is best not to bring the work to the following steps. It should be noted that it is best not to turn on the power amplifier and other equipment of the system at the same time when the equipment of the sound system is running alone, so as not to damage the power amplifier and speaker due to failure. Then all relevant equipment of the system can be used together to debug the whole system.

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