Radio frequency equipment and work bands

When it comes to working with sound, the radio frequency equipment and the work bands are two indispensable concepts. We explain everything about them below.

What is radiofrequency?

Radiofrequency is what is known as the radiofrequency spectrum in which electromagnetic waves are transmitted by applying alternating current that is created in an antenna or generator.

The work bands

The VHF (Very High Frequency) and UHF (Ultra High Frequency) radio frequency systems are known as working bands. Generally, UHFs are chosen ones because the probability of interference is much lower because there are fewer systems in operation and because the frequency spectrum available is greater.


However, VHF systems also have their advantages. On the one hand, they are more affordable on the market. On the other hand, the variety of products available is greater and, in addition, their quality in most cases is higher.

They are also easier to use. And finally, they are better prepared to work under worse conditions. These products can be found in professional companies in the connector industry.

Radio frequency equipment

Within the equipment, we find the following elements:

· Antennas: antennas are tuned for a specific frequency range or for a specific frequency. Their size is directly related to the wavelength of the signal to be picked up. As for their location, in most cases they are located on microphone feet.



· Cables: For cables, the RG-58, RG-59 or RG-213 coaxial cables are used; all of them have an impedance of 50 ohm. Note that the larger the section, the better the quality of the signal transport.

· Connectors: they deserve special care because they are one of the most sensitive parts in any type of installation. Before installing them, you need to know what type of connector you need and check very carefully that they are not damaged and that the solder is good.



· Distributor: is a key element for multi-channel systems. This is an antenna distribution system, which can be either active or passive. Its main objective is to extend a transmission system. It is usually used in microphone racks as a connector between the output of one antenna and two or more receivers.

· Combiner: in the same way as the distributor, it is an element that multi-channel systems need to work. The combiner, as its name suggests, combines several signals into a single output. Its use usually occurs in the emission with a single antenna signal from different transmitters.

· Filters: they are used to eliminate any type of harmonic generated by the amplifier.

· Amplifier: placed at the input of a coaxial cable and used to amplify the signal at the output of the antenna.

· Racks: are wireless microphone systems.



In essence, this is how radio frequency equipment and work bands work.