The Existence of RF Noise – The Need to Control Unwanted Noise Frequencies

The existence of RF noise is an important factor in numerous electronic and radio frequency based circuits. In telecommunications industry, signal processing needs to be as smooth as possible for the good quality transmissions. But, sometimes there might be interference in the signal, which could hamper communications. In few cases, the signal amplitude may decrease drastically or may dissolve into an incoherent audio signal. For avoiding such situations, if you are in charge of these systems, you should first try to pinpoint the RF noise source and take appropriate steps to correct it. You can even use certain devices and integrate them with the systems so that the noise levels can be limited. For a better understanding, read the sections given below that explain detailed information about RF noise.


RF Noise Categories

There are various categories of RF noise depending on frequency distribution and its nature:


White noise – This type of noise affects all frequencies equally and spreads through flat amplitude.


Pink Noise – This noise category does not exhibit a flat response. Its power density decreases with increase in frequency.


Band Limited Noise – This RF noise category is characterized by a frequency band that is limited with the help of filters or circuits, through which the noise passes.




Effects of RF Noise

Apart from interference, RF noise can significantly affect the bit error rate (BER) of communication systems, causing data errors. This is mainly caused when there are variations in amplitude caused due to unnecessary noise. If such errors continue to occur progressively, the quality may drop leading to bad networks. From a simplistic viewpoint, the interfering noise can essentially mask out the actual signal frequency that needs to be broadcasted.


Noise Measurement and Control

Elimination of noise is a crucial aspect, and you should be given substantial emphasis to noise control, if you are working in the sector of telecommunications. For controlling the noise, you first need to check the level of this aspect with the help of RF test equipment. You can use a carrier-to-noise generator device that generates a particular noise at a specific level (Microwaves and RF, CARRIER-TO-NOISE GENERATORS ENHANCE BER TESTING, 2017). This noise level can then be measured along with frequency response and other aspects to check whether the signal processing is smooth, along with minimum obstacles. Such RF testing equipment can also help maintain a good carrier-to-noise ratio, which dictates the quality of the signal communication and signal accuracy (Tech Target, CARRIER-TO-NOISE RATIO, 2017).


Be it a noise generator or any other devices, there are several companies that can provide you with the right type of equipment for implementing effective communications. Before choosing the provider of such devices, you should always consider factors such as cost, machine quality, guarantee, brand popularity, etc.


“The above blog is written by a third party and is only for informative purposes. It does not reflect Ranatec’s position with regards to the provided information.”