How to avoid "communication" when the audio device is connected

　　1. The shell of the reasonable grounding audio equipment is generally shielded with the power transformer of the device. This device shell also has a "ground", and this "ground" is also different from the other two "land". When the "ground" of the earth is more interference, the "ground" of the device shell can reduce the interference interference, otherwise it should not be connected.

　　2. Weak signal equipment power supply and strong signal equipment power group connect to weak signal source equipment such as CD, card seat, effector, tuning table, compressed amplifier and equalizer. The connection of the group power supply can avoid the noise interference of power AC in conduction.

　　3. Separate the signal ground line between different audio devices of the two "ground" potentials to avoid directly connecting or forming the ground circuit. Such as the balanced connection outer shielding line is only ground at one end, or the two ends are not grounded.

　　4. When connecting a clean power supply power supply power supply, a separate power transformer should be designed. When unconditional, you can use an independent set of power supply to power the power, and the power supply is separated from the air conditioner, light and other equipment; or the use of isolation power transformers, etc. Measures.

　　5. The use of suspended grounding is the same potential as the potential as the ground, which is zero potential. But this point is not directly connected to the ground. It is the point where the sound level of the audio equipment circuit is zero. There are impedance between this "ground" and actual ground, and it is high impedance, which can overcome the interference of co -model.

　　6. There is no DC circuit connection between the two sound equipment.

　　7. Different system connections must adopt a balanced isolation transformer to connect the audio system and the TV broadcast car audio system; the system and large electronic display connection; or the connection with the electronic computer, etc., is generally necessary to connect to a balanced isolation transformer. Different systems are most likely to cause interference to communicate noise.

　　8. The transmission method of a long -distance transmission signal is transmitted by a balanced or balanced transformer. The short distance can be unbalanced. The transmission method of a balanced isolation transformer generally has a balanced transformer at both ends. One end of the shielding layer can also be suspended. Grounding can play a shielding effect, and it can also prevent equipment leakage from electric shock. When not grounding, the balance transformer at both ends can play an insulation and isolation effect. The central ground is grounded to leak static electricity.

　　9. In the case where the power supply interference is very serious, the device is connected to the power supply equipment and monitoring equipment of the small signal together. The power amplifier can reduce the communication noise interference from the power supply.

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