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Precautions and tips for using wireless microphones

Author:admin   AddTime:2021-05-13

With the popularity and widespread use of wireless microphones, how can they better play their superior role, the following issues should be paid attention to in the operation and use:

1. How to buy battery for wireless microphone transmitter
In order to ensure that the signal distortion and frequency interference will not occur during the normal use of the system, a battery with sufficient power must be used. It is best to use an alkaline 9V battery if the conditions are available when purchasing.

2. How can we know as soon as possible whether the transmitter battery energy is sufficient?

In various brands and models of wireless microphone systems, most receivers do not have the transmitter battery energy display function. Although some wireless transmitters have low battery indications, users generally seldom pay attention to this problem during use. In the normal use of wireless microphones, audio signal distortion or frequency interference occurs from time to time due to insufficient battery. In order to prevent this phenomenon, the operator can use the PFL pre-listening function of the mixer in a timely manner during the normal use of the wireless microphone, and use headphones to monitor the signal of the wireless microphone. If the sound clarity is slightly reduced or the noise is slightly increased , The battery should be replaced immediately, so as to avoid the psychological pressure of the operator due to insufficient battery energy as much as possible.

3. How to change the battery in the middle of the show
It should be convenient, quick and simple to change the battery during the performance. The best way is to turn on the "Mute" switch of the mixer channel to make the wireless microphone in a mute state. If the mixer does not have this function, first turn off the output volume of the wireless microphone receiver, and then turn off the transmitter. After replacing the battery, turn on the power of the transmitter, and then restore the output volume of the receiver to its original gain. If the receiver does not have an output volume switch, you can turn off the mixer input gain or use the Line/MIC selector to switch. After replacing the battery, power on and then reset the mixer input gain or selector. Why not change the battery after turning off the fader of the wireless microphone channel? It should be noted here that it is more cumbersome to replace the battery by turning off the channel fader. Generally, the microphone has effect processing sound during singing. If one microphone is used, the battery of the other wireless microphone needs to be replaced. At this time, if you turn off the Channel faders, the auxiliary channel potentiometers used for reverberation and delay should also be turned off accordingly. If you forget to turn off the auxiliary channel potentiometers, the power impact sound of the shape wireless microphone transmitter will pass through the auxiliary channel when the battery is replaced. If the auxiliary potentiometer is leaked after the battery is replaced, there will be no effect sound, which will affect the sound effect. I would like to remind everyone to pay great attention to the fact that you must develop the habit of removing the transmitter power after each performance (especially using non-alkaline batteries), otherwise you may forget to turn off the transmitter because you have not removed the battery. The shape of the power supply causes the battery energy to run out, causing battery leakage and damaging the transmitter system, causing unnecessary losses.

Fourth, how to use the antenna correctly to ensure the signal stability
When using multiple sets of wireless microphone systems, if it is the same series of products, it is best to use an antenna splitter if possible to minimize the mutual interference between the antennas. If there is no antenna splitter, the wireless microphone should be received first The antenna of the receiver is adjusted to the best position, and then placed in parallel, keeping a proper distance between each wireless microphone receiver (the antennas on each receiver cannot touch each other), so that each receiver has a better In order to improve the directivity of the wireless receiver, avoid mutual interference between frequencies to obtain a better wireless signal. In addition, it is best to install an extended antenna or an active amplification antenna for large-scale performances to improve the receiving effect.

5. How to prevent the silent phenomenon that may appear in the performance
In performances, singers always use handheld wireless microphones alternately. After some actors use them, they may unconsciously turn off the power of the wireless transmitter or turn on the mute switch of the microphone, so that the microphone is in a mute state. The transmitter power switch and microphone mute switch are installed in positions that are easy to touch with fingers, so that when an actor uses the wireless microphone, there will be an embarrassing scene of no sound from the wireless microphone, which not only affects the actor’s performance mood, but also affects The audience’s interest in watching may also catch the operator by surprise, which must be taken seriously. In fact, when the power of the wireless microphone transmitter is turned off, the DIVERSITY transmitter working display LED on the wireless microphone receiver will go out. When personnel use the wireless microphone, they can often check the working status of the wireless receiver during the program change. However, if the mute switch of the wireless microphone is turned on, most wireless microphone receivers cannot Displayed. Unless the operator uses headphones to monitor when the program alternates (generally not realistic).
In order to prevent the wireless microphone from being silent, the operator should fix the power switch of the wireless microphone transmitter and the microphone mute switch, which are more exposed, with tape before the performance. It should be used at all times, so that the wireless transmitter and microphone are always in working condition to ensure the normal performance of the performance.

Sixth, how to make the wireless microphone play the best effect
In order to make the wireless microphone play the best effect, the relationship between the transmitter output level gain, the receiver output gain and the mixer input gain must be handled properly. If not handled properly, the sound may be suppressed and lack penetration. Or the sound is distorted or even excessive.
The correct operation method is to turn on the wireless microphone to receive the power of the receiver and the audio system, and after setting the audio system level (0DB or +4DB), turn on the power amplifier to the maximum output, and set the main output volume of the mixer at the same time. At 0DB, turn on the power of the wireless microphone transmitter, then set the audio output gain of the wireless microphone transmitter at 70%~75%, and set the channel potentiometer of the wireless microphone input channel on the mixer at 0DB; Finally, carefully adjust the input gain of the mixer, and if necessary, adjust the audio output gain of the transmitter in small increments until the microphone effect is satisfactory.

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