Correctly Setting UHF Wireless System
A UHF wireless microphone system consists of a transmitter and a receiver. The communication between the two is done on ultra high frequency (UHF), hence the name UHF. Depending on your requirements like range and quality, the system varies. However, this article in particular deals with UHF wireless microphone systems and will help you in setting up the system correctly.
Even in UHF wireless microphone systems, the transmitters can be of varied shapes, sizes and forms depending on the requirements. Most of the times, a UHF wireless microphone is shaped like any other microphone and the transmitter is placed within the body of the microphone. More sophisticated ones are the lapel microphones which are discreetly placed on the clothes of the presenter. The microphone also can be worn as a headset, albeit of very small size so both the hands remain free. UHF microphones also can be attached directly to instruments and produce same results as cabled microphones.
The job of a receiver in UHF wireless microphone system is very similar to that of a radio. The receiver catches the radio waves generated by the transmitter, converts them to electronic waves, routes them through the system and produces near original quality sound. The receiver usually is connected to the mixing console or the sound system or an amplifier depending on the purpose of the wireless microphone system.
Though previous generation of wireless microphone systems used to come with visible antennas, the present generation does not have any, at least which are apparently visible. The purpose of antennas is to facilitate communication between the transmitter and the receiver. Automatic switch is the circuitry which replaces antennas. If you are still using wireless microphone systems with antennas, the system works best when the antennas are pointing towards each other at 45 degrees. Any physical or electronic interference will impede the quality of sound output, thus the space between the transmitter and receiver ideally should be open.
Adjusting the Frequency
As most electronic devices like cell-phones and display devices emit some form of electronic waves or noise, there is a chance that it may interfere with functioning of normal wireless microphone systems. UHF wireless systems work above these frequencies so work properly even in presence of other electronic interferences. All that needs to be done is to equate the frequency on the transmitter and receiver and your job is done.
Sensitivity is nothing but the volume level of the transmitter. Like a normal microphone, you can adjust the sensitivity of the microphone according to the requirements. Modern transmitters come with LCD displays which simplify the job tremendously.
The output can be controlled at the receiver end by fine tuning the adjustments. As the receiver is directly connected to the sound system, amplifier or the mixing console, a professional usually takes care of things at this end.