In the performance or entertainment sound reinforcement project, the choice of wireless microphone, using UHF (U) or VHF (V)? Generally speaking, the V segment microphone is suitable for hotels, convention and Exhibition Center, teaching system, while the U microphone is suitable for radio, television and theater performances. A system that uses multiple channels to work simultaneously uses true diversity reception. However, experienced design and construction staff will usually be two sets of the system before the show try, mainly to check whether the electromagnetic field is suitable for the use of your wireless microphone.
V segment is indeed in the use of multiple sets of wireless microphones have interference with each other, of course, can not say that there is no U segment, but it has a large range of expansion, you can try to tune. So what is the difference between the two? Which is more advantageous? Xiaobian to sort out, let you thoroughly understand.
1,
Transmitter signal
V section of the wireless microphone transmitter part of the main use of a number of frequency doubling circuit to achieve high frequency signal, the transmitter signal carrier frequency is fixed.
Most of the wireless microphone transmitter in the U segment adopts the phase locked loop technology to obtain the high frequency signal.
2,
Receiving host transmission signal
V wireless microphone receiver is also made of fixed frequency points.
Most of the wireless microphone receiver of the U segment is made of adjustable frequency receiving.
3,
Anti-interference ability
When there is interference signal, V wireless microphone is difficult to avoid, U wireless microphone can be adjusted by the transmitter and receiver frequency is easier to avoid all kinds of interference. U band wireless microphone for professional performances often do come true diversity, which is a microphone with two antennas to receive U band wireless microphone with minimum probability breakpoint (UHF true diversity wireless microphone design excellent).
4,
Signal transduction pathway
VHF RF signal transmission to the smaller metal object reflection, diffraction can be on the human body and other non-metallic objects; penetrating; line loss is low, the antenna can be appropriately extended battery; use a long time; by the VHF TV channel, paging, letter machine and industrial pollution such as welding, electrical and other interference; frequency range the use of 61MHZ, the range can be extended too narrow, Mike use frequency congestion, compatible with less frequency; the dynamic range of the signal is small.
UHF RF signal transmission reflection on small metal objects, multiple transmission can be formed on the human disturbance; non metallic object occlusion attenuation; line loss, the receiver should be as close to Mike; for large transmitting power, the battery life is short; high frequency interference is less; the frequency range can be used the 270MHZ range can be extended, can use Mike, can form a larger system; the large dynamic range of signal.
Compared to so many, we can see that the two wireless microphones have their own characteristics
. Why do most people say that U is better than V?
Ke Feng applies to radio and television, theater performances. Multi channel simultaneous operation
In the performance or entertainment sound reinforcement project, the choice of wireless microphone, using UHF (U) or VHF (V)? Generally speaking, the V segment microphone is suitable for hotels, convention and Exhibition Center, teaching system, while the U microphone is suitable for radio, television and theater
1,
The amount of information is determined by the frequency of the electromagnetic wave
It is well known that the amount of information is determined by the frequency of the electromagnetic wave. The lower the frequency, the longer the transmission distance, the smaller the loading data. The higher the frequency, the shorter the transmission distance, the larger the amount of data. V waves and U waves are two directions, which is why V waves are more suitable for radio, walkie talkies, aerospace communications, and U waves are more suitable for television.
V band because of the low frequency range (180MHZ--280MHZ), so there will be interference in more than 6, the U band range is wide (500MHZ--900MH), so there will be more than more than and 60 interference. In addition to the small load data, which is why V band sound is one of the important reasons.
Now, with the development of technology, more and more professional voice processing, the need to choose a long range of V band, the sound quality requirements can choose U band. These two frequency bands for wireless microphones have their own advantages and disadvantages. This is determined by the frequency of the user, the physical characteristics of the frequency band, and the frequency range of the adjustment.
Because the U segment is a high-frequency transmitter and receiver, so the requirements of the electronic components of their own to be higher than the V segment, the technical content is also much higher. In the application, U segment because most of the frequency of daily life is not a segment, so greatly reduced the chance of interference. U segment of the Duan Kuanguang, you can do more frequency points to achieve the same mistake on the same occasion using multiple frequency points without interference.
2,
Factory cost
There is a real problem is that the microphone manufacturers because of the above reasons in the U segment of the material on the purchase of the product will be more expensive than the V segment. In actual use, because most of the U segment has FM function, so it is more convenient than the V segment.
