Wireless microphone，It is composed of a pocket transmitter (can be packed in a pocket, the output power of about 0.01W) and a centralized receiver, each pocket transmitter has a different working frequency, the centralized receiver can receive the voice signal of different working frequencies issued by the pocket transmitter at the same time. It is suitable for the stage, podium and other occasions.withWireless microphoneThe popularity and widespread use, how to better play their superior role, in the operation of the use should pay attention to the following issues:
　　First, how to buyWireless microphoneIn order to ensure the normal use of the system without signal distortion and frequency interference, it is necessary to use sufficient batteries, and it is best to choose alkaline 9V batteries when there are conditions for purchase.
　How to know as soon as possible whether the transmitter battery energy is sufficient In various brands and models of wireless microphone systems, the vast majority of receivers do not have the transmitter battery energy display function. Although some wireless transmitters have battery low pressure displays, users generally pay little attention to this problem in use. In the normal use of wireless microphones, there is a lack of battery caused by audio signal distortion or frequency interference is often happened. In order to prevent this phenomenon, the operator can use the PFL pre-listening function in the normal use of the wireless microphone in a timely manner, and monitor the signal of the wireless microphone with the headset. If the clarity of the sound is slightly reduced or the noise is slightly increased, the battery should be replaced immediately, so as to avoid the psychological pressure brought by the lack of battery energy to the operator as much as possible.
　How to change the battery in the middle of the performance should be convenient, fast and simple when replacing the battery during the performance. The best way is to open the "mute" switch of the mixer channel, so that the wireless microphone is in a mute state, such as the mixer without this function can first turn off the output volume of the wireless microphone receiver, and then turn off the transmitter power supply, replace the battery after opening the transmitter power supply, and then restore the receiver output volume to the original gain, such as the receiver has no output volume switch. The console input gain can be turned off or switched with the Line/MIC selector, and the console input gain or selector can be reset after the battery is replaced and the machine is turned on.
　Why not turn off the fader on the wireless microphone channel and then replace the battery? It needs to be explained here that if the use of the method of closing the channel fader to replace the battery is more tedious, in the singing of the general microphone has an effect processing sound, if a microphone is used, another wireless microphone needs to replace the battery, then if the channel fader is closed, it should also be closed accordingly for reverberation, delay of the auxiliary channel potentiometer, If you forget to turn off the auxiliary channel potentiometer, when replacing the battery, the power shock sound of the shape wireless microphone transmitter will be output from the auxiliary channel through the effect device to the mixing, which directly affects the sound effect; In addition, if the auxiliary potentiometer is leaked after the battery is replaced, there will be no effect sound and affect the sound effect. In particular, it is important to remind everyone that after each performance, we must develop the habit of taking out the transmitter power supply (especially the use of non-alkaline batteries), otherwise sometimes because the battery is not removed, and forget to turn off the transmitter power supply shape, causing battery energy depletion, resulting in battery leakage damage to the transmitter system accident, causing unnecessary losses.
　　Fourth, how to prevent and avoid interference from the outside world to wireless microphone in the purchase of non-frequency unlimited microphone should first make clear the local TV station's transmission frequency, the purchase should stagger the TV station's transmission frequency from interference, the purchase of multiple wireless microphone systems should also pay attention to the frequency of the system can not be repeated to avoid mutual interference when the frequency overlap.
　　Five, how to eliminate wireless microphone from external interference non-variable frequency DIVERSITY Wireless microphone system in the case of external interference (refers to the transmitter power off, there is still RF radio frequency, AF audio or diversity diversity on the receiver display to either or both of the LED display has A signal display, It indicates that the receiver is being interfered with by external radio waves), and the SQUEICH quiet can be adjusted to improve reception and reduce interference. The specific method is to adjust the antenna position, the transmitter is still turned off, the receiver volume output gain is turned off, and finally adjust the SQUEICH quiet device clockwise until all interference signals disappear (at this time the receiver has no signal display except the power display), and then turn clockwise a little, and be sure to use a non-inductive screwdriver when debugging.