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Applications of Spectrum Analysers

12/21/2012 12:54:40 PM | by Anonymous


Spectrum analysers receive and measure radio waves within given parameters which are responsible for data to be transmitted to a television or radio set. This way, the strength of signal can be monitored. Monitoring of signal strength by using spectrum analysers will ensure that viewers and listeners will constantly receive clear signals. What spectrum analysers measure when applied with radio are the frequency of response, noise and distortion inherent in a radio frequency and signal-to-noise ratio.


Another important application of analysers is in handphones. Same principle applies as it also uses short waves which are very similar to radio waves to transmit data from one phone to another. If radio waves drop, signal decreases as well. Mobile phone is an invaluable item in this age and frequent disruption on network signal can instantly give a telecommunication company a bad reputation. This is why telecommunication industry relies on spectrum analysers to make sure that they are able to give quality service to their subscribers or else they will look for another service provider who are known for having a good network signal. Other simple applications of spectrum analysers are in loud speakers and tape recorders. They are also used in various industries that require measurement of sound levels.


A good type of spectrum analysers is the one that can be connected to a wireless receiver or a personal computer and if used together with the supplied software can turn it into powerful dual channel spectrum analyser. This can be used in determining the cause of interference to wireless networking equipment which includes wifi and wireless routers. This is also suitable for capturing data from signals that frequently changes over a long period of time. Spectrum analysers are also applied in most modern signaling process. One example of this application is in optical analysers. They can be set to measure the light beams that LED such as diodes or lasers emit.


Electrical signal can be measured with the use of an oscilloscope and spectrum analyzer. However, the former can only display how the signal changes with time unlike the latter which can provide graphical representation of the signal frequency’s amplitude. Spectral analyser can also determine multitude of measurements which is not possible with oscilloscope. The multitude of measurements includes power bandwidth, power output and stability and a variety of distortions.


Spectrum analyser has two types: analog and digital. Being familiar with these two can help which one is the correct type to use in an application. Apart from the parameters of the job, both has their advantages and disadvantages which must be considered when choosing for the right analyser. When working with very high frequencies, the suitable device to use could be analog analyser. However, digital analyser is more preferred as it can generate better frequency resolution. To overcome the limitations of both types, a hybrid analyzer is produced. By using superheterodyne receiver, this type is able to operate like an analog spectrum analyzer which converts high-frequency input into a low frequency. The frequency resolution result will be similar to what digital analyser can produce since the frequency has been lowered into a level that it can work with.

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