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- Crosby_system abstract "The Crosby system was an FM stereophonic broadcasting standard developed by Murray G. Crosby. In the United States, it competed with, and ultimately lost to, the Zenith/GE system, which the FCC chose as the standard in 1961.While both systems used multiplexing to transmit the L-R stereo signal, the Crosby system used a frequency-modulated 50 kHz subcarrier, whereas the competing Zenith/GE system used an amplitude-modulated 38 kHz subcarrier. As FM is less susceptible to interference and noise than AM, the Crosby system had better frequency response and less noise of the two systems especially under weak signal conditions. However, the Crosby system was incompatible with existing subsidiary communications authorization (SCA) services which used subcarrier frequencies including 41 and 67 kHz. These SCA services were used by many FM stations since the mid-1950s for subscription-based "storecasting" to raise revenue and for other non-broadcast purposes. They consequently lobbied the FCC to adopt the Zenith/GE system. FCC tests in 1960 confirmed that the Zenith/GE stereo system was compatible with 67 kHz SCA operation, although not 41 kHz.According to Jack Hannold:On April 19, 1961, the FCC released its Final Order selecting the Zenith/GE system as the FM stereophonic broadcasting standard. At 9:59 AM that day, Crosby-Teletronics stock was worth $15 a share; by 2:00 P.M. it was down to less than $2.50. Another (albeit relatively minor) factor in the FCC choosing the Zenith/GE system was the widespread use of vacuum tubes in radios at the time; the additional tubes for an all-FM system would have increased the size, weight, cost of and heat generated by each tuner or receiver.".
- Crosby_system wikiPageExternalLink stereo.html.
- Crosby_system wikiPageExternalLink browse.cfm?elib=829.
- Crosby_system wikiPageExternalLink EQ_2001_07.html.
- Crosby_system wikiPageID "1490232".
- Crosby_system wikiPageLength "4343".
- Crosby_system wikiPageOutDegree "9".
- Crosby_system wikiPageRevisionID "674142985".
- Crosby_system wikiPageWikiLink Audio_Engineering_Society.
- Crosby_system wikiPageWikiLink Category:Broadcasting.
- Crosby_system wikiPageWikiLink Federal_Communications_Commission.
- Crosby_system wikiPageWikiLink Multiplexing.
- Crosby_system wikiPageWikiLink Murray_G._Crosby.
- Crosby_system wikiPageWikiLink Stereophonic.
- Crosby_system wikiPageWikiLink Stereophonic_sound.
- Crosby_system wikiPageWikiLink Subsidiary_communications_authority.
- Crosby_system wikiPageWikiLink Subsidiary_communications_authorization.
- Crosby_system wikiPageWikiLink Vacuum_tube.
- Crosby_system wikiPageWikiLinkText "Crosby system".
- Crosby_system hasPhotoCollection Crosby_system.
- Crosby_system wikiPageUsesTemplate Template:Closed_access.
- Crosby_system wikiPageUsesTemplate Template:Cquote.
- Crosby_system wikiPageUsesTemplate Template:Reflist.
- Crosby_system subject Category:Broadcasting.
- Crosby_system comment "The Crosby system was an FM stereophonic broadcasting standard developed by Murray G. Crosby. In the United States, it competed with, and ultimately lost to, the Zenith/GE system, which the FCC chose as the standard in 1961.While both systems used multiplexing to transmit the L-R stereo signal, the Crosby system used a frequency-modulated 50 kHz subcarrier, whereas the competing Zenith/GE system used an amplitude-modulated 38 kHz subcarrier.".
- Crosby_system label "Crosby system".
- Crosby_system sameAs m.055fzq.
- Crosby_system sameAs Q5188051.
- Crosby_system sameAs Q5188051.
- Crosby_system wasDerivedFrom Crosby_system?oldid=674142985.
- Crosby_system isPrimaryTopicOf Crosby_system.