We often encounter that after the customized infrared wireless microphone is installed, the user will call again after a period of time to ask why your microphone has a lot of noise. In addition to eliminating the line failure and machine reasons, there is also a large noise. The problem has to be paid attention to, that is the problem of frequency.

Generally, after purchasing a customized infrared wireless microphone of a brand and model, we will first tell the supplier about the on-site environment where the customized infrared wireless microphone is used, such as the size of the venue, the simultaneous use of several sets of microphones in the same occasion, and the distance between the rooms. To be clear. If the number of customized infrared wireless microphones is large and the chance of cross-frequency is relatively large, it is recommended that the supplier supply us with multiple frequency groups, so that the chance of interference is smaller. In the early stage of installation, we also need to understand Know whether there are interference sources around, such as whether the signal shielding jammers or high-power signal transmission towers are around.

When the frequency of the customized infrared wireless microphone is adjusted, each channel on the general host has a signal strength bar showing RF and AF. The RF bar is the receiving strength bar of the radio frequency signal. After the microphone is frequency aligned, the signal is the best. The wireless microphone host of the LED display screen uses LED lights to display RF and AF signals. The lights are on to indicate that there is a signal. If the microphone corresponding to the channel is turned off, and the RF and AF signals still have signals, it means that the channel has interference and needs to be adjusted. When the channel reaches an idle frequency point (that is, until there is no RF signal after the microphone of the channel is turned off), then let the microphone transmitter frequency match. Since multiple sets of wireless microphones are used at the same time, some other frequency signals will be derived, so the multiple sets of wireless After getting the frequency, don't forget a step, which is to turn off and then turn on the microphone of each channel in sequence. When the microphone is turned off, there is no RF signal. The frequency derived when you turn on the microphone is relatively weak. Nope, the interference will appear after you turn off the microphone of the channel.