When it comes to wireless microphones, we often hear FM, VHF, UHF microphones. Do you know the difference between the three microphone segments FM.VHF.UHF? What are their advantages and disadvantages? What kind of scene is it suitable for? Perhaps this article can help you answer these questions.
 

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1.FM segment

Everyone knows FM radio. The frequency of the FM radio is 88-108MHz. The wireless microphone frequency of the FM band is higher than 108MHz, generally between 110-120MHz. Therefore, the FM radio signal will not interfere with the wireless microphone of the FM segment, but will be interfered by other clutter.

The advantages of FM wireless microphones are:
The circuit structure is simple and the cost is low, which is beneficial to the manufacturer.

The disadvantages of FM wireless microphones are:
The sound quality is poor, the frequency will change with time/ambient temperature, and there will often be poor reception, disconnection, and large interference. Shouting at the microphone, there will be a break.

Use occasions: The wireless microphone in the FM band has very low requirements on the use scene and does not require much sound quality. An FM wireless microphone can be used in this case where only sound is required.
2. VHF segment

The VHF segment is abbreviated as V segment and the frequency is between 180-280 MHz. Due to the high frequency, there is generally little interference. With crystal frequency locking, there is no case of frequency conversion, and the receiving performance is relatively stable.

V-band wireless microphones generally have two circuits.

The first circuit: The high-frequency part uses only one 2003 integrated IC.
These include: signal reception, RF amplification, mixing, and frequency discrimination. The sensitivity is not high, and the frequency part adopts the 31101 line. The audio is compressed and expanded, and the sound quality is greatly improved compared to FM. Receive performance has improved a bit.

Advantages: Receive stability. There are very few breaks in short distances.

Disadvantages: The high frequency part is not stable, the audio frequency response is not wide enough, and the professional use effect is not ideal.

Use occasion: Generally it is a household microphone, which requires relatively stable performance and good sound quality. You can use this type of wireless microphone.

The second circuit: the high frequency part adopts discrete processing, high frequency amplification, and intermediate frequency amplification. Mixing, frequency discrimination. Step by step, the effect is better, the sensitivity is higher, and the performance is more stable. The audio processing part adopts 571 lines, which has better sound quality and wider audio frequency response.

Advantages: stable performance and good sound quality.

Use occasion: KTV hall, home. Small and medium-sized concerts have an excellent effect.
3. UHF segment

The UHF segment is generally used to be called the U segment. The frequency is generally between 700 and 900 MHz. Because of this high frequency, it is difficult to have other external frequencies that can interfere with it. Most of the U segments use patch components and the performance is very stable.

The U segment generally has three circuits. The audio processing circuit uses the latest 571 line, and the sound quality is better.

First: Single frequency.

Similar to the VHF section frequency circuit, high frequency amplification, medium frequency amplification. Mixing, frequency discrimination. Step-by-step processing, high-resolution several sets for amplification, audio processing using 571 line design, clear sound quality.

Use occasion: If it is not satisfied with the V segment, the use requirements are not very high. Or you can use this type of machine if there is interference in the environment using the V-segment machine.

Second: Adjustable frequency.

This type of machine is controlled by a microcomputer program. The high frequency oscillation is controlled by a phase locked loop (PLL). Generally there are multiple channels that can be adjusted. There are even thousands of adjustable frequency points to choose from. Effectively avoid interference, multiple machines can be used at the same place at the same time without mutual interference. If there is interference, the frequency can be adjusted to other frequency points to avoid interference and squelch control. Audio processing has a new design and stable performance.

Use occasion: This type of machine is used in high-grade multiple KTV rooms. Small and medium-sized concerts. Or ask a multi-person colleague to use it when singing, the effect is ideal.

Third: Diversity.

Diversity is diversity reception. One is single frequency diversity, and the other is adjustable frequency test diversity. In addition to the functions of the U-segment machine, this type of machine uses two receiving circuits for each channel. If there is an error in the receiving system of one channel, there is also a way to receive the signal, effectively avoiding the dead zone of the signal, greatly improving the technical level of the whole machine, ensuring the stability of the receiving signal, receiving continuous information, such a machine is more advanced wireless microphone. The farthest distance can be more than 200 meters.

Use occasions: a variety of large and medium-sized concerts. The environment is very demanding and the environment is more complicated. This type of machine is the best choice.
 

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	FM	VHF	UHF
Frequency Range	110-120MHz	180-280MHz	700-900MHz
Types			Single       frequency.	Adjustable  frequency.	Diversity.
Advantages	1. Simple circuit structure 2. Low cost	1. Receive performance is stable.  2. There are very few breaks in short distances. 3. Stable performance and good sound quality.	1. Performance is very stable. 2. The sound quality is clear. 3. Audio processing has a new design and stable performance. 4. The high frequency oscillation is controlled by a phase locked loop (PLL). 5. Thousands of adjustable frequency points are available. 6. Receive signal stability and receive continuous information.
Disadvantages	1. Poor sound quality 2. Frequency will vary with time / ambient temperature 3. Poor reception performance 4. Vulnerable to interference	The high frequency part is unstable, the audio response is not wide enough, and the professional use effect is not ideal.
Use Case	The requirements for using the scene are very low and do not require much sound quality.	KTV hall, home microphone. Small and medium-sized concerts work great.	More KTV rooms. Large, medium and small concerts. The environment is more complicated.