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Wireless microphone knowledge

1. Can I use two microphones of the same frequency at the same time?

Cannot be used simultaneously. Wireless transmissions cannot be "mixed" in the air, and even at the same frequency, the receiver cannot mix two transmitted signals. For example, two FM radio stations transmit signals on the same frequency, which is not possible. This can cause confusion and audio distortion. In summary, each wireless transmitter should have its own unique frequency for the receiver.

2. How much difference does the frequency of the wireless microphone have to avoid interference?

This depends on the situation, but at least 4MHz. Here we cannot answer this question explicitly because it involves complex calculations. In general, the less expensive wireless systems require a larger frequency difference because their receivers are simpler to design and have fewer options. This limits the number of compatible channels. The system with higher price has better filterability, the distance between channels is closer, and the compatible channels are correspondingly increased. If we say "you don't want to do your own calculations", you must be right. If you need it, please contact the manufacturer or agent who will help you calculate. Most manufacturers have calculated the compatible frequencies of each of the Shure's wireless features, so you don't have to do these cumbersome mathematical calculations yourself.

3. UHF is better than VHF, right?

 These two frequency segments for wireless microphones have their own advantages and their respective disadvantages. This is determined by the user of the frequency band, the physical characteristics of the frequency band, and the adjustment limits of the frequency band.

    Here are a few aspects of UHF over VHF:

    There is no “crowded” VHF band in the UHF band.

    The frequency-flexible UHF is used in a wider range.

    UHF features provide more compatible systems. [For example, Shure LX and SC (VHF band) systems can only provide 12 compatible channels, while Shure's UHF band system can provide more than 100 compatible channels. ]

    The UHF system has a higher power output than VHF, a wider frequency shift, a better dynamic range, and a better signal-to-noise ratio than VHF.

    VHF is superior to several aspects of UHF:

    VHF systems are cheaper.

    The VHF has a larger transmission range at a given transmit power.

    VHF signal transmission, even through non-metallic substances. VHF has a longer wavelength and is not easily absorbed by the body.

4. Can UHF systems be compatible with VHF systems?

Yes, even if the number of compatible VHF systems is the largest, it is also compatible with UHF. (But the UHF receiver's current VHF antenna 'VHF splitter, or VHF antenna distribution amplifier cannot be connected)