File:Screen capture of cluster letter beacons.gif

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Screen_capture_of_cluster_letter_beacons.gif (359 × 278 pixels, file size: 100 KB, MIME type: image/gif)

Summary

Non-free media information and use rationale true for Letter beacons
Description	Screen capture of cluster letter beacons.
Source	Off-air reception at author's amateur radio station.
Article	Letter beacons
Portion used	no
Low resolution?	yes
Purpose of use	Illustrate cluster beacon spectrum
Replaceable?
Other information	This is a screenshot of radio spectrum using SPECTRAN V2.213 software, which is freely available for private and hobby use. Copyright of the software: Copyright 2004 Alberto I2PHD and Vittorio IK2CZL.
Fair useFair use of copyrighted material in the context of Letter beacons//en.wikipedia.org/wiki/File:Screen_capture_of_cluster_letter_beacons.giftrue

Licensing

This is a screenshot of copyrighted computer software, and the copyright for its contents is most likely held by the author(s) or the company that created the software. It is believed that the use of a limited number of low-resolution screenshots:

for identification of, and critical commentary on, the software in question,
in the absence of a free alternative,
on the English-language Wikipedia, hosted on servers in the United States by the non-profit Wikimedia Foundation,

…qualifies as fair use under United States copyright law. Any other uses of this image, on Wikipedia or elsewhere, may be copyright infringement. See Wikipedia:Non-free content for more information. Fair use

File history

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	21:38, 19 September 2017		359 × 278 (100 KB)	RonBot (talk \| contribs)	Reduce size of non-free image to NFCC guideline
	11:28, 8 March 2009	No thumbnail	395 × 306 (52 KB)	M G Tuffen (talk \| contribs)

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File usage

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Letter beacon