FM Radio Broadcast

FM radio broadcast is one of the main types of radio broadcasting. FM usually denotes frequency modulation. This frequency modulation usually takes place on VHF airwaves in a frequency range of 88 to 108 around the world except Japan and Russia. This following article shares precise information on FM radio broadcast. So, find out everything about FM radio broadcast whether its advantages or disadvantages right here.

Sources have revealed that FM radio broadcasting is very popular especially in developed areas including Europe and United States because higher sound fidelity as well as stereo broadcasting certainly became quite familiar in this format. During 1930s, Edwin H Armstrong invented FM radio. He invented it to overcome the interference problem associated with AM radio broadcasting to which is relatively immune. Going further with the details on FM radio broadcast, we come up with the point that for accommodating an audio signal in FM radio, it does not require a bandwidth of 200 kHz. What is all required is 20 kHz to 30 kHz for a narrowband FM radio broadcast or FM signal. The 200 kHz bandwidth enabled space for ±75 kHz signal deviation from the appointed frequency.

Moreover, guard bands for minimizing or eliminating adjacent channel interference. However, the greater or higher bandwidth enables to broadcast for a 15 kHz bandwidth audio signal. Meanwhile the extra unused capacity is generally used for transmitting utility acts like background music for public areas, as well as GPS auxiliary signals.

The problem of AM radio interference during nighttime was generally addressed in different way. The time when FM was first set up, the available frequencies were far greater or larger in comparison to those used for AM radio broadcast roughly around 100. Using these frequencies meant that even at far larger power, the range of a given FM radio broadcast or FM signal was much shorter, thus its market was more local than for AM radio. The reception range at night is the same as in the daytime. However, all new radios included both AM and FM tuners, FM became the dominant medium, especially in cities. Because of its greater range, AM remained more common in rural environments.