Wireless microphone frequently asked questions and answers

2019-01-21 10:57:13 admin

Wireless microphone frequently asked questions and answers


Can I use two microphones of the same frequency at the same time


Can not be used at the same time.Wireless transmissions cannot "mix" in the air, and receivers cannot mix two transmissions even at the same frequency.For example, it is not possible for two FM radio stations to transmit signals on the same frequency.This can cause confusion and audio distortion.In short, each radio transmitter should have its own receiver with its own unique frequency.


2. What is the difference in frequency of wireless microphone to avoid interference?


It depends, but at least it's 4MHz.We cannot answer this question explicitly here, because it involves complex calculations.In general, cheaper wireless systems require a wide range of frequencies because of their simple receiver design and lack of choice.This limits the number of compatible channels.The more expensive system has better filtering performance, closer distance between channels and more compatible channels.If we say, "you don't want to do the math yourself," we're right.If you need, please contact the manufacturer or agent, they will help you calculate.Most manufacturers have calculated the compatible frequency for each of shur's wireless features, so you don't have to do all the tedious math yourself.


3. UHF is superior to VHF, right?


These two frequency bands for wireless microphones have both advantages and disadvantages.This is determined by the user of the frequency band, the physical characteristics of the frequency band, and the regulatory limits of the frequency band.


Here are some of the advantages of UHF over VHF:


1) UHF frequency band is not "crowded" as VHF frequency band.

2) UHF with flexible frequency can be used in a wider range.

3) UHF features can provide more compatible systems.[for example, shur LX and SC (VHF band) systems can only provide 12 compatible channels, while shur UHF band systems can provide more than 100 compatible channels.]

4) the power output of UHF system is higher than VHF, with wider frequency shift, better dynamic range and better signal-to-noise ratio.


VHF is superior to UHF in several aspects:


1) VHF system is relatively cheap.

2) VHF has a wider range under a specified transmission power.

3) VHF signal transmissibility, even through non-metallic materials.VHF has a longer wavelength and is not easily absorbed by the human body.


4. Is the UHF system compatible with the VHF system?


Yes, it is also compatible with UHF even when the maximum number of compatible VHF systems is used.(but not the UHF receiver ` VHF separator, the current VHF antenna or VHF antenna connected distribution amplifier).


5. The receiver and microphone are on, but no signal is received. What is the reason?


There are two possibilities:


1) if the receiver and microphone are of different frequency points, please change either of them to the same correct frequency point. If it is a PLL model with the same frequency range, the frequency point may be selected incorrectly. Please change the channel selection to the same correct frequency point.


2) microphone fault if the above two frequency points are selected the same, one of the microphone or receiver may fail. Another microphone of the same type and frequency point can be tested. If the receiver can be activated, the original microphone is faulty;Or test with another receiver of the same type and frequency, if activated, the original receiver is faulty.


6. Why can't the microphone be activated?


Check for low battery power or incorrect refill.


7. What if the signal transmission distance is short and the signal is disconnected?


1) please check whether the antenna is installed correctly.


2) please check whether the weak battery signal indicator is on.


8. What is the reason for the hum noise in the speaker?


1) the microphone may malfunction and affect the appropriate current supply.


(2) do not share the same socket with other electrical appliances.