With the popularity and widespread use of wireless microphones, how can we better play their superior role, pay attention to the following problems in operation and use:

First, how to choose the battery of the wireless microphone transmitter

In order to ensure that the system does not suffer from signal distortion and frequency interference during normal use, you must use a battery that is sufficient. If you have the conditions when purchasing, it is best to use an alkaline 9V battery.

Second, how can I know if the transmitter battery energy is sufficient?

In all brands and models of wireless microphone systems, most receivers do not have a transmitter battery energy display. Although some wireless transmitters have a low-voltage display on the battery, users rarely pay attention to this problem during use. In the normal use of the wireless microphone, it is a time when the battery is insufficient to cause distortion or frequency interference of the audio signal. In order to prevent this from happening, the operator can use the mixer PFL pre-listening function in the normal use of the wireless microphone, and use the 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 on the operator due to insufficient battery energy.

Third, how to replace the battery in the middle of the show

It should be convenient, fast and simple to replace 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 the mute state. If the mixer does not have this function, the output of the wireless microphone receiver can be turned off first, then the emission is turned off. Power on the machine, turn on the power of the transmitter after replacing the battery, and then restore the receiver output volume to the original gain. If the receiver does not have the output volume switch, turn off the mixer input gain or use the Line/MIC selector to switch. After the battery is replaced, turn it on and then reset the mixer input gain or selector. Why not replace the battery after the wireless microphone channel fader is turned off? Need to explain here, if you use the method of closing the channel fader to replace the battery, it is more cumbersome. In the singing, the general microphone has an effect processing sound. If one microphone is used, another wireless microphone needs to be replaced. If this is turned off, For the channel fader, the auxiliary channel potentiometer for reverberation and delay should be turned off at the same time. If you forget to turn off the auxiliary channel potentiometer, the power supply sound of the shape wireless microphone transmitter will change from the auxiliary channel when the battery is replaced. The output of the device to the mixing directly affects the sound effect; in addition, if the auxiliary potentiometer is leaked after replacing the battery, there will be no effect sound and affect the sound effect. Here, I would like to remind everyone to pay great attention to the fact that after each performance, you must develop the habit of taking out the power of the transmitter (especially using non-alkaline batteries), otherwise you may forget to turn off the transmitter because you did not remove the battery. The shape of the power source causes the battery to run out of energy, causing the battery to leak and damage the transmitter system, causing unnecessary losses.

Fourth, how can we prevent and avoid external interference with wireless microphones?

Before purchasing a non-inverting infinite microphone, you should first understand the transmission frequency of the local TV station. When purchasing, you should stagger the transmission frequency of the TV station from interference. When purchasing multiple wireless microphone systems, you should also pay attention to the frequency of each system. To avoid mutual interference when the frequencies overlap.

5. How to eliminate wireless microphones from external interference

Non-convertible diversity wireless microphone system is subject to external interference (refers to the RF display of either or both of RF, AF audio or DIVERSITY diversity on the receiver display when the transmitter power is off) If the signal is displayed, it indicates that the receiver is in the interference of external radio waves. The SQUEICH quieter can be adjusted to improve reception and reduce interference. The specific method is to adjust the antenna position, the transmitter is still off, the receiver volume output gain is turned off, and finally the SQUEICH static device is adjusted clockwise until all the interference signals disappear (the receiver except the power display) There is no signal display outside), then turn clockwise a little, be sure to use a non-inductive screwdriver when debugging.

Sixth, how to use the antenna correctly to ensure signal stability

When using multiple sets of wireless microphone systems, if the same series of products, if possible, it is best to use the antenna splitter to minimize mutual interference between the antennas. If there is no antenna splitter, the wireless microphone should be received first. The antenna of the machine is adjusted to the optimal position, and then the words are placed in parallel, and the distance between each wireless microphone receiver is maintained (the antennas on each receiver cannot collide), so that the receivers are better. The receiving condition is to improve the directivity of the wireless receiver and avoid mutual interference between the frequencies to obtain a better wireless signal. In addition, it is better to install a long antenna or an active amplifying antenna for the performance of large-scale occasions to improve the receiving effect.

Seven, how to correctly identify the wireless microphone in use

When using more than two handheld wireless microphones of the same model at the same time, each wireless microphone should be marked with a different color to prevent misoperation, and the marking should generally be placed at the bottom of the handheld wireless microphone. Where the block is blocked, the same color as the microphone should be marked or marked on the channel corresponding to the microphone on the mixer. In this way, even if the actor mistakenly takes the wireless microphone, the operator can correct it in time when the presenter introduces the actor or plays the song. In addition, you can also use the color microphone dust cover to mark, which not only eliminates the "gasp" sound and the "beep" sound, but also can be used as a microphone mark, which is really good for both. Especially when singing or re-singing, it is more important to adjust the volume and tone of each microphone in time according to the color code.

For the pocket-type wireless microphone to prevent mistakes, you can first set the number or color of each microphone transmitter, and make a fixed or fixed machine before the performance. If there are several programs to be used alternately, just in case, After each alternation, the person and the machine are registered by the special person, and the registration status is notified to the operator to avoid operational errors.

How to prevent the silent phenomenon that may occur in the performance

During the performance, the singers always use handheld wireless microphones alternately. Some actors may unintentionally turn off the power of the wireless transmitter or turn on the microphone mute switch to make the microphone in a mute state. The transmitter power switch and the microphone mute switch are installed in a position where the finger is easy to touch, so that when the next actor uses the wireless microphone, there will be a silent scene of the wireless microphone, which not only affects the performance mood of the actor, but also affects The viewer's interest in watching may also make the operator unprepared, which must be taken seriously. In fact, when the wireless microphone transmitter power is turned off, the DIVERSITY transmitter working display LED on the wireless microphone receiver will go out if operation When the wireless microphone is used, it is possible to detect the behavior of the wireless receiver when the program alternates. However, if the wireless microphone's mute switch is turned on, most wireless microphone receivers cannot. Displayed unless the operator uses the ear when the program alternates Listening (usually unrealistic).

In order to prevent the wireless microphone from being silent, the operator should fix the wireless microphone transmitter power switch and the microphone mute switch that are exposed to such switches before the performance, and fix them with tape. If there is a microphone switch cover, then Should be used twice, so that the wireless transmitter and microphone are always working to ensure the performance is normal.

Nine, how to operate the waist-mounted wireless microphone

Waist-mounted wireless microphones generally use miniature electret condenser microphones, which are sensitive and omnidirectional, and are easy to generate acoustic feedback when used, especially in the case of using a returning speaker on the stage. For drama and essays, if the stage is the floor and the bottom of the floor is a cavity, in order to prevent low-frequency resonance, the bass gain of the channel on the mixer should be properly attenuated, and the signal of the system will be returned. The output gain is also subjected to the necessary attenuation. Generally, the attenuation amplitude is above 6DB. In the case of a passionate performance, the signal output of the listening system can be cut off to avoid acoustic feedback.

X. How to use the radio sound instrument system correctly

The radio acoustic instrument system is mainly used for audio sources such as electric guitars, electric motors, electronic keyboards, synthesizers and computer drums. The main difference from the wireless microphone system is that the pickup method is different. The microphone pickup is a low-impedance output and the electroacoustic instrument pickup is a high-impedance output (the microphone is 0DB output and the electroacoustic instrument is -20DB output), so the LINE/MIC on the wireless transmitter should be used when using the electroacoustic instrument. The (line/microphone) switch is set at the LINE position; the gain of the transmitter is adjusted appropriately to adjust and control the level of the distortion overshoot. The wireless microphone receiver should also set the LINE/MIC switch to the LINE position. In this way, not only the acoustic matching between the electroacoustic instrument and each device is achieved, but also the level is properly matched, and the performance of the electroacoustic instrument can be optimally exerted. If the LINE/MIC switch is set to the MIC/microphone position, it will cause distortion when connected to the mixer's /MIC microphone jack. Serious damage can also occur.

11. How can I make the wireless microphone work best?

In order to achieve the best effect of the wireless microphone, the relationship between the transmitter output level gain, the receiver output gain and the mixer input gain must be handled. If improperly handled, sound suppression and no penetration may occur. Or the sound is distorted and even overly aggressive.

The correct method of operation is to connect the wireless microphone to receive the power of the receiver and the audio system, and set the audio system level (0DB or +4DB), then turn the amplifier to the maximum output, and set the volume of the main output of the mixer. At 0DB, turn on the wireless microphone transmitter power, and then set the wireless microphone transmitter's audio output gain to 70%~75%, and set the channel potentiometer of the wireless microphone input channel on the mixer to 0DB; Finally, carefully adjust the mixer input gain, and if necessary, adjust the transmitter audio output gain to a small extent until the microphone is satisfactory.