SpectrumView – Frequency Analysis Software. The SpectrumView app can be used to measure the highest tones you can sing, obtain visual feedback of the frequencies in your speech, identify an annoying sound, calibrating musical instruments, or generally for all sorts of acoustic analysis.
From WD6CNF:
Input to Audio Spectrum Analyzer from microphone or wave file. Audio Spectrum Analyzer has variable displays, Fast Fourier Transform (FFT) display, variable sample rates (8000 Hz, 11025 Hz, 22050 Hz, and 44100 Hz), variable transform sizes (1k, 2k, 4k, and 8k), adjustable upper and lower limits, continuous, averaged, and peak hold, selectable foreground and backgrounds, variable markers, option to save a reference plot compare with the foreground plot, time display (oscilloscope), triggered sweep, and waterfall display (color or B/W).
What do you need to know about free software?
Input to Audio Spectrum Analyzer from microphone or wave file. Audio Spectrum Analyzer has variable displays, Fast Fourier Transform (FFT) display, variable sample rates (8000 Hz, 11025 Hz, 22050 Hz, and 44100 Hz), variable transform sizes (1k, 2k, 4k, and 8k), adjustable upper and lower limits, continuous, averaged, and peak hold, selectable foreground and backgrounds, variable markers, option to save a reference plot compare with the foreground plot, time display (oscilloscope), triggered sweep, and waterfall display (color or B/W).
For Wi-Fi analysis tools, my go-to-person is Nuts About Nets owner Steve Leytus. Nuts About Nets offers tools that measure Radio Frequency (RF) characteristics, ranging from network discovery to spectrum analysis. This post and this post look at some of the tools tendered by the company.
Wi-Fi tech wish list
One tool that many Wi-Fi techs have on their wish list is an RF spectrum analyzer. That's because when tasked with tracking down an RF interference problem like that shown in Figure B, other than guessing, using an RF spectrum analyzer is the only way to determine the source and exact frequency of the interference. However, good RF spectrum analyzers are expensive.
A good and inexpensive RF spectrum analyzer
One reason Nuts About Nets is interesting is the company's ability to offer great tools (software and hardware) that are inexpensive. And, it appears Leytus has done it again with his newest offering: RF Explorer, a low-cost spectrum analyzer. The Wi-Fi version is less than $120. 'RF Explorer is a remarkable device -- and it would belittle its true value to even qualify that statement by saying for the money,' mentions Leytus. 'Performance and sensitivity are on par with instruments that cost many times more.'
Figure C
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RF Explorer (Figure C) is the design of Ariel Rocholl and his team of engineers in Spain, manufactured by Seeed Technology in China, and distributed by Nuts About Nets. This YouTube video explores the screens on the hand unit. RF Explorer also operates with a PC. The PC app, also shown above, is the product of Nuts About Nets.
See the full list of features and specifications. Some of the more notable features are:
For Wi-Fi techs, here are the specs:
More goodies for those who like to dig inside the hardware and software:
Frequency Spectrum Analyzer Hz App Free
A standalone RF spectrum analyzer that also connects to a PC running more graphical diagnostic software is unique in the wireless industry. Mp5 airsoft rifle. Rocholl adds, 'Some library licensing limitations prevent us from opening RF Explorer native firmware as open source, however we will offer a fully open Arduino compatible internal expansion module so you can complement, extend or even override original firmware with your own.'
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One of the first things I did when I met Leytus was ask about the name Nuts About Nets. Leytus a Biochemistry PhD with a BS in Computer Science answers, 'We wanted a name that conveyed what we do (the 'Nets' part) and that we enjoy it (the 'Nuts about' part). The world is full of serious issues -- troubleshooting Wi-Fi networks should not be one of them.'
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