Talk:Spectrum analyzer

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Audio frequency (and low RF) FFT analysers

Also known as Dynamic Signal Analysers. This section should be significantly expanded to include commercial instruments from HP/Agilent/Keysight and SRS and also examples based on computers with analog acquisition adapters. The commercial instruments represent the state-of-the-art amalgamation of analog and digital electronics and software. The HP journal abounds with wonderful, groundbreaking examples including the HP3582A and HP89410A. I'd be willing to make an attempt at this if there is some support for the idea.Frank van kann (talk) 07:32, 19 October 2024 (UTC)[reply]

FFT analysers

Just wondering if FFT analysers also provide the phase spectrum (in addition to the amplitude spectrum)? — Preceding unsigned comment added by 2001:770:20:4870:5459:20D2:407F:D42F (talk) 11:19, 9 February 2017 (UTC)[reply]

Of course they do! And if you have more than one input channel, they can provide transfer functions - both amplitude and phase and many other features. Frank van kann (talk) 07:36, 19 October 2024 (UTC)[reply]

Agilent Spectrum Analysis Basics (tripple content)

Same file mentioned and linked 3 times in Footnotes. Please clean up.

British/International English

Should the article be titled with "analyser" as opposed to the "analyzer" american spelling? No where else in the world uses the 'z' so it seems a bit incorrect. 206.248.157.145 (talk) 22:44, 27 November 2007 (UTC)[reply]

Product Information links

Is it really right to have these links to web pages advertising spectrum analyzers? I've been leary of adding links to the information pages the company I work for has on using spec-ans just to avoid any impropriety, but if everybody else is going to get links.... At least the links I would add would be to useful info. N0YKG 02:35, 9 December 2005 (UTC)[reply]

Agreed. I'm not sure you want people using this encyclopedia to advertise their products. However, if you follow those links you will see that the documents are not advertisements, but informative technical bulletins that can be generally applied to ANY spectrum analyzer. If your docs fit the same description I don't see a problem.--mcrema 22 February 2006

Keep the links. At least they have some pictures (which the article lacks). Romanski 10:11, 22 May 2006 (UTC)[reply]

Software Audio Spectrum Analysers

Perhaps a paragraph on software spectrum analyzers is in order? There seem to be many out there. And they (software sudio spectrum analysers) are also being used as building blocks in other more complex systems, an example of this are the audio visualization plugins for Winmp, etc. Maybe the kind of encyclopedia that would make a good science project, like, "Sonograms (or Spectrograms) of Common Sounds" where sonograms of common sounds (car motor, running water, dog barking, baby crying, etc.) are presented (i.e., the printed screen captures of the sound's audio spectra) - this project could be done for 0$ using throw-away hardware, free OS, free soundcard-based software audio spectrum analyser. (Wod observer (talk) 18:56, 10 January 2008 (UTC))[reply]

TfD nomination of Template:Video

Template:Video has been nominated for deletion. You are invited to comment at Wikipedia:Templates_for_deletion#Template:Video the discussion at the template's entry on the Templates for Deletion page.

The nominator Chris Cunningham/User:Thumperward removed the template from all the articles and then nominated it for deletion. This is a well-known Wikipedia:Ownership gambit by stealth removing a feature with mass edits and then claiming it's not used as a reason for deletion.
He then reverted my attempt to keep the video template on an article page at least until the deletion discussion is completed. This prevents editors from making any comparisons on the technical merits of the template, which further forces you to accept his ownership of articles presenting videos. I have requested a Speedy Keep due to his unconsensed mass edits, until there can be an informed and un-owned editorial discussion on the technical merits.
Until he again re-reverts, you can at least temporarily revert his edit to see what the video template looked like, and then consider the technical issues on their merits which are described at the template deletion discussion. Milo 02:33, 22 March 2008 (UTC)[reply]

Wrong Example?

The example image File:Bluetooth_signal_behind_wireless_lan_signal.png in article, which is referred from Hidden Signals, showing real-time persistent spectrum of Bluetooth signal under WLAN signal appears to be wrong. The proper frequency should be 2.4 GHz instead of 1.0 Ghz (center frequency) shown in picture. JohnLM (talk) 17:37, 9 January 2012 (UTC)[reply]

Those signals do look correct, even though on the wrong frequency. Most likely what happened is that the signal were produced by a vector signal generator, and not any devices operating in the 2.4GHz range. Since whoever produced the image has an FSVR, I'm sure they have a VSG capable of doign that. 64.114.87.10 (talk) 20:19, 4 April 2012 (UTC)[reply]

Given that this isn't a real life example (i.e. you can't actually observe a non-spurious Bluetooth signal in the WLAN spectrum on an antenna and it is obviously generated with a VSG), isn't this example contrived? I suggest that it be removed since it is both misleading and inaccurate for the application. (talk) 7 March 2012 (UTC)

File:N9342C Handheld Spectrum Analyzer.jpg Nominated for speedy Deletion

An image used in this article, File:N9342C Handheld Spectrum Analyzer.jpg, has been nominated for speedy deletion at Wikimedia Commons for the following reason: Copyright violations

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Using a spectrum analyzer in the field

A spectrum analyzer is basicly a wide-band receiver displaying the frequency domain, showing amplitude vs frequency, where an oscilloscope shows the time domain as voltage vs time, In the field it can be used to check & aim antennas, look for interference sources, and to detect & measure a transmitted signal. This gives the "Big Picture" allowing you to determine if specialized instruments are needed to diagnose the problem.

Sections need to be added explaining how spectrum analyzers are used in the field, on the workbench and in the test lab. Also, there other areas of engineering using spectrum analyzers that need to be discussed.

dond (talk) 16:40, 7 September 2016 (UTC)[reply]

External links modified (January 2018)

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A Commons file used on this page has been nominated for deletion

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8k UHD (7680 × 2160) Demo picture showing a high resolution GSM frequency spectrum.jpg

Participate in the deletion discussion at the nomination page. —Community Tech bot (talk) 00:07, 12 June 2019 (UTC)[reply]

A Commons file used on this page has been nominated for speedy deletion

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Spectrum trigger function.png

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Blind time

Could someone who understands this stuff clarify the meaning of "blind time" in the article? The first sentence using the word implies it's been defined elsewhere, but it's not, and the adjacent diagram is neither explanatory nor obvious (if you're just reading the text). I sort of understand what it means, but it'd be nice to have a precise (but brief) definition.

Thanks, Finney1234 (talk) 16:06, 9 April 2020 (UTC)[reply]

You might want to start by asking Gerovitus who created the blind time image in 2011 and added this text about the problem. Half the text is now missing, and none of it was referenced.

I agree that it needs a good explanation. That or removal. Binksternet (talk) 19:06, 9 April 2020 (UTC)[reply]

Constant314's copy edit at least removes the implication that the technical term was already explained. It'd be nice to have a definition as well, but I'm OK with that change (the diagram does establish that "blind time" is a genuine technical term). Finney1234 (talk) 20:56, 9 April 2020 (UTC)[reply]

distinction between spectrum analyzer and channelizer

Spectrum analyzer#FFT-based is describing a channelizer. My experience with spectrum analyzers dates back to the '60s, and there was no expectation of the Nyquist sample-rate being met. Bob K (talk) 14:40, 15 September 2024 (UTC)[reply]