How to connect a wireless microphone, what is the difference between UHF and VHF?

- May 21, 2019-


In modern life, the demand for wireless microphones is increasing, and scenes such as home entertainment, conference training, and KTV rooms are used. I bought a wireless microphone and how to connect it, whether it is UHF or VHF, but it is hard to beat some people.


How to match the frequency


First, you should first turn on the power of the transmitter, ensure that the power switch is smooth, then turn on the power of the host, and pull the antenna out.


Carefully check that the number of frequencies displayed on the transmitter matches the number of frequencies displayed on the host. If it is not consistent, re-modulation is required.


The receiver and transmitter can only match successfully at the same frequency. The receiver and transmitter lights are always on, indicating that the frequency is successful and the receiver is blinking, indicating that the frequency has failed.


At the end of use, power off the main unit, turn off the transmitter, and place the transmitter in the chassis.wireless-microphone


You can select "Specific Wireless Microphone Blank Channel Search" from the list, you will be able to search and then click "Agree". Then, the searched channel is displayed.


Wireless microphone frequency selection


Both UHF and VHF are radio bands, UHF is very high frequency band, center frequency is 145MHz, frequency range is between 144.000 and 145.800MHz; VHF is high frequency band, center frequency is 435MHz, frequency range is divided into two segments: 430.000 to 435.000 and 438.000 Up to 440.000MHz.


UHF wireless microphones use phase-locked loop technology to obtain high frequency, and the transmitter frequency is basically adjustable. The VHF wireless microphone transmitter mainly uses several stages of frequency multiplier circuit to obtain high frequency, and the transmitter frequency is fixed.


UHF wireless microphone receivers are mostly adjustable frequencies, while VHF wireless microphone receivers are basically fixed frequency points. UHF receivers use small or built-in antennas, and VHF receiver antennas are longer.


The UHF wireless microphone signal has many reflections on metal objects, large attenuation to the human body, and large transmission loss. The VHF wireless microphone signal has small reflection on metal objects, can be diffracted, is transparent to the human body, and has low transmission loss; in short, UHF The frequency is higher than VHF, and the higher the frequency, the greater the loss while transmitting.