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rickmegens
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Im totally new to electrical engineering, and i would like to know how to make one (spectrum analyzer)?
by Averagesupernova
Not all spectrums work the way Cliff explained.
Originally posted by Averagesupernova
What frequency range are you talking about? Not all spectrums work the way Cliff explained. While I still agree it is rather difficult to build one yourself, I can explain how some of them work.
Originally posted by Cliff_J
Dude, the only reason for RF is to get my tunes!
While on this topic and explaining, is the type of spectrum analyzer you described (possibly more specialized) what is used to create those polar plots like some people use to see the distribution of signals within an NTSC signal? I've only seen them implemented in software like Cannopus's editing software or Final Cut Pro but I understand its a pretty standard tool in a TV repair shop.
Cliff
A spectrum analyzer works by taking a signal and breaking it down into its individual frequency components. It does this by using a technique called Fourier analysis, which involves converting the signal from the time domain to the frequency domain. The spectrum analyzer then displays the amplitude of each frequency component on a graph, allowing for analysis and measurement of the signal's frequency content.
The main components of a spectrum analyzer include a mixer, a local oscillator, a filter, and a detector. The mixer combines the input signal with a reference signal from the local oscillator, which produces an intermediate frequency signal. The filter then selects a specific frequency range from the intermediate signal, and the detector measures the amplitude of that frequency range and displays it on the spectrum analyzer's screen.
There are two main types of spectrum analyzers: swept-tuned and FFT (Fast Fourier Transform). Swept-tuned spectrum analyzers use a sweeping local oscillator and filter to scan through different frequencies, while FFT analyzers use digital signal processing to analyze the entire frequency range at once. FFT analyzers are typically faster and more accurate, but swept-tuned analyzers can handle wider frequency ranges.
Spectrum analyzers are used in a variety of fields, including telecommunications, electronics, audio engineering, and scientific research. They are commonly used to measure and characterize signals, troubleshoot issues in electronic systems, and analyze the frequency content of audio signals. They are also used in quality control and testing processes for electronic devices and components.
Yes, it is possible to build your own spectrum analyzer with the necessary knowledge and components. However, it can be a complex and challenging task, and it may be more efficient and cost-effective to purchase a commercial spectrum analyzer. If you are interested in building your own, there are many resources available online that provide step-by-step guides and instructions for DIY spectrum analyzer projects.