Jump to content

File:Modulated radio signal frequency spectrum.svg

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia
Original file (SVG file, nominally 437 × 284 pixels, file size: 14 KB)

Summary

Description
English: The frequency spectrum of a typical AM or FM modulated radio signal, as it would be seen on a spectrum analyzer. The vertical axis is signal strength or voltage, the horizontal axis is frequency. It consists of a strong carrier wave (C) at the frequency fC of the radio transmitter. The information (modulation) carried by the signal is contained in two narrow frequency bands above and below the carrier frequency, called sidebands (SB). The sidebands are symmetrical about the carrier. In an audio radio broadcast the sidebands carry the audio signal that represents the sound waves. The portions of the sidebands close to the carrier contain the low audio frequencies, while the portions further from the carrier contain the high audio frequencies. Therefore the sidebands tend to fall off farther from the carrier, and also close to the carrier at points which represent bass frequencies below 20 Hz, the lower human hearing limit.
Date
Source Own work
Author Chetvorno
SVG development
InfoField
 The SVG code is valid.
 This diagram was created with Inkscape.
 This diagram uses translateable embedded text.

Licensing

I, the copyright holder of this work, hereby publish it under the following license:
Creative Commons CC-Zero 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.

Captions

Frequency spectrum of a radio signal

Items portrayed in this file

depicts

spectrum

carrier wave

Sideband

inception

5 April 2017

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current23:44, 28 January 2019Thumbnail for version as of 23:44, 28 January 2019437 × 284 (14 KB)ChetvornoAdded bandwidth of signal
15:44, 9 May 2017Thumbnail for version as of 15:44, 9 May 2017450 × 262 (10 KB)ChetvornoAnother try at fixing invalid SVG
02:37, 9 May 2017Thumbnail for version as of 02:37, 9 May 2017450 × 262 (10 KB)ChetvornoReplaced invalid Inkscape SVG with "plain SVG" version which is valid
23:43, 5 April 2017Thumbnail for version as of 23:43, 5 April 2017450 × 262 (13 KB)ChetvornoUser created page with UploadWizard

The following 5 pages use this file:

Global file usage

The following other wikis use this file:

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Retrieved from "https://en.wikipedia.org/wiki/File:Modulated_radio_signal_frequency_spectrum.svg"