Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Pilot_signal> ?p ?o }
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- Pilot_signal abstract "In telecommunications, a pilot signal is a signal, usually a single frequency, transmitted over a communications system for supervisory, control, equalization, continuity, synchronization, or reference purposes. In FM stereo broadcasting, a pilot tone of 19 kHz indicates that there is stereophonic information at 38 kHz (19×2, the second harmonic of the pilot). The receiver doubles the frequency of the pilot tone and uses it as a phase reference to demodulate the stereo information.If no 19 kHz pilot tone is present, then any signals in the 23-53 kHz range are ignored by a stereo receiver. A guard band of ±4 kHz (15-23 kHz) protects the pilot tone from interference from the baseband audio signal (50 Hz-15 kHz) and from the lower sideband of the double sideband stereo information (23-53 kHz). The third harmonic of the pilot (19×3, or 57 kHz) is used for Radio Data System.In AM stereo, the bandwidth is too narrow to accommodate subcarriers, so the modulation itself is changed, and the pilot tone is infrasonic (below the normal hearing range, instead of above it) at a frequency of 25 Hz.In color television, the color burst placed between each pair of video fields is the pilot signal to indicate that there are color subcarriers present.In the NTSC television system, a pilot tone of 15.7342657 kHz is used to indicate the presence of MTS stereo. In some analog video formats (Frequency modulation is the standard method for recording the luminance part of the signal, and is used to record a composite video signal in Direct colour systems), e.g. Video 2000 and some Hi-band formats a pilot tone is added to the signal to detect and correct timebase errors.Note: Sometimes it is necessary to employ several independent pilot frequencies. Most radio relay systems use radio or continuity pilots of their own but transmit also the pilot frequencies belonging to the carrier frequency multiplex system.".
- Pilot_signal thumbnail Frequency_Spectrum_FM-Radio.gif?width=300.
- Pilot_signal wikiPageID "645530".
- Pilot_signal wikiPageLength "2777".
- Pilot_signal wikiPageOutDegree "37".
- Pilot_signal wikiPageRevisionID "671951862".
- Pilot_signal wikiPageWikiLink AM_stereo.
- Pilot_signal wikiPageWikiLink Adjacent-channel_interference.
- Pilot_signal wikiPageWikiLink Audio_frequency.
- Pilot_signal wikiPageWikiLink Bandwidth_(signal_processing).
- Pilot_signal wikiPageWikiLink Baseband.
- Pilot_signal wikiPageWikiLink Broadcasting.
- Pilot_signal wikiPageWikiLink Carrier_wave.
- Pilot_signal wikiPageWikiLink Category:Synchronization.
- Pilot_signal wikiPageWikiLink Category:Telecommunications_techniques.
- Pilot_signal wikiPageWikiLink Color_television.
- Pilot_signal wikiPageWikiLink Colorburst.
- Pilot_signal wikiPageWikiLink Communications_system.
- Pilot_signal wikiPageWikiLink Equalization_(communications).
- Pilot_signal wikiPageWikiLink FM_broadcasting.
- Pilot_signal wikiPageWikiLink Film_frame.
- Pilot_signal wikiPageWikiLink Frequency.
- Pilot_signal wikiPageWikiLink Guard_band.
- Pilot_signal wikiPageWikiLink Harmonic.
- Pilot_signal wikiPageWikiLink Hearing.
- Pilot_signal wikiPageWikiLink Hertz.
- Pilot_signal wikiPageWikiLink Infrasound.
- Pilot_signal wikiPageWikiLink Modulation.
- Pilot_signal wikiPageWikiLink Multichannel_television_sound.
- Pilot_signal wikiPageWikiLink NTSC.
- Pilot_signal wikiPageWikiLink Narrowband.
- Pilot_signal wikiPageWikiLink Radio_Data_System.
- Pilot_signal wikiPageWikiLink Radio_relay.
- Pilot_signal wikiPageWikiLink Reference.
- Pilot_signal wikiPageWikiLink Sideband.
- Pilot_signal wikiPageWikiLink Signaling_(telecommunications).
- Pilot_signal wikiPageWikiLink Stereophonic_sound.
- Pilot_signal wikiPageWikiLink Synchronization.
- Pilot_signal wikiPageWikiLink Telecommunication.
- Pilot_signal wikiPageWikiLink Time_base_correction.
- Pilot_signal wikiPageWikiLink Video_2000.
- Pilot_signal wikiPageWikiLink File:Frequency_Spectrum_FM-Radio.gif.
- Pilot_signal wikiPageWikiLinkText "19kHz pilot".
- Pilot_signal wikiPageWikiLinkText "FM pilot tone".
- Pilot_signal wikiPageWikiLinkText "Pilot signal".
- Pilot_signal wikiPageWikiLinkText "Pilot".
- Pilot_signal wikiPageWikiLinkText "Pilots".
- Pilot_signal wikiPageWikiLinkText "pilot carrier".
- Pilot_signal wikiPageWikiLinkText "pilot signal".
- Pilot_signal wikiPageWikiLinkText "pilot tone".
- Pilot_signal wikiPageWikiLinkText "pilot tones".
- Pilot_signal wikiPageUsesTemplate Template:FS1037C_MS188.
- Pilot_signal wikiPageUsesTemplate Template:Redirect.
- Pilot_signal subject Category:Synchronization.
- Pilot_signal subject Category:Telecommunications_techniques.
- Pilot_signal hypernym Signal.
- Pilot_signal type Broadcaster.
- Pilot_signal type Source.
- Pilot_signal type Technique.
- Pilot_signal comment "In telecommunications, a pilot signal is a signal, usually a single frequency, transmitted over a communications system for supervisory, control, equalization, continuity, synchronization, or reference purposes. In FM stereo broadcasting, a pilot tone of 19 kHz indicates that there is stereophonic information at 38 kHz (19×2, the second harmonic of the pilot).".
- Pilot_signal label "Pilot signal".
- Pilot_signal sameAs Q2095206.
- Pilot_signal sameAs Pilotton.
- Pilot_signal sameAs m.02_3_7.
- Pilot_signal sameAs Пилот-сигнал.
- Pilot_signal sameAs Q2095206.
- Pilot_signal wasDerivedFrom Pilot_signal?oldid=671951862.
- Pilot_signal depiction Frequency_Spectrum_FM-Radio.gif.
- Pilot_signal isPrimaryTopicOf Pilot_signal.