Friends who often go to KTV to sing should have encountered such a situation: turn on the karaoke machine, pick up the wireless microphone, and immediately hear the super harsh sound, sometimes emitting a loud noise. Such a voice is unacceptable to anyone's ears. Let me introduce you to the problem that the wireless microphone is interfered with by the KTV karaoke machine.
First, the problem analysis encountered such a situation, some people suspect that there is a problem with the wireless microphone, in fact, not. This is because the radiation noise of the current KTV karaoke machine or DVD is too high, which interferes with the trouble caused by the wireless microphone receiver.
Now some karaoke machines on the market or some cheap DVD optical drive products have high noise due to poor internal circuit isolation.
Second, the problem solution Generally, the wireless microphone receiver is preset at the lower level of the mute control starting voltage (SquelchLevel) at the factory to increase the sensitivity and increase the receiving distance, so it is susceptible to noise interference during use. The output noise is loud.
Since the wireless microphone is used even at close range, its emission intensity will change continuously with the user's movement or environmental changes. When the wireless microphone moves a little distance or changes some angles, its transmitted signal strength is low. In the noise intensity, the noise immediately replaces the signal of the wireless microphone, and instantly outputs a loud noise from the receiver.
In order to avoid noise interference, the mute control level is raised so that the noise signal cannot start the receiver. However, the sensitivity of the receiver will also become very low, so the use distance of the wireless microphone becomes very short.
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