File:Superheterodyne frequency graph.svg
Original file (SVG file, nominally 1,061 × 329 pixels, file size: 18 KB)
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Summary[edit]
DescriptionSuperheterodyne frequency graph.svg |
English: Graph showing how a superheterodyne radio receiver receives a radio signal, shifting it down to the IF frequency. The frequency spectrum of the desired radio transmission is shown at RF. it consists of a carrier wave at the center frequency (dark blue) with sidebands representing the modulation (light blue) on either side. This is mixed with the signal from the local oscillator (LO) at a lower frequency. The result is a heterodyne (beat) signal called the intermediate frequency at the difference of these two frequencies IF = RF − LO. This is amplified and bandpass (red) filtered in the IF amplifier, and passed through a detector to extract the modulation (M). The receiver can also receive signals at the image frequency LO − IF, so an image rejection filter (red) is needed on the input .to reject this frequency |
Date | |
Source | Own work |
Author | Chetvorno |
Licensing[edit]
This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 04:07, 26 January 2016 | 1,061 × 329 (18 KB) | Chetvorno (talk | contribs) | Moved labels around | |
18:07, 23 January 2016 | 1,044 × 337 (18 KB) | Chetvorno (talk | contribs) | Increased size of font | ||
06:49, 23 January 2016 | 1,044 × 337 (18 KB) | Chetvorno (talk | contribs) | Reduced font size | ||
06:42, 23 January 2016 | 1,044 × 337 (18 KB) | Chetvorno (talk | contribs) | Extended graph to right to leave more room for text labels | ||
06:30, 23 January 2016 | 1,000 × 336 (19 KB) | Chetvorno (talk | contribs) | Moved text to make it look better | ||
06:27, 23 January 2016 | 1,000 × 336 (19 KB) | Chetvorno (talk | contribs) | Moved text to prevent cropping | ||
06:18, 23 January 2016 | 1,000 × 336 (19 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
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Height | 329.39764 |