EntityQ1638417· pop 14· linked from 237 articlesmechanical televisionSign in to savea television system that relies on a mechanical scanning device, to both scan and reproduce the video signalConnectionswattEntityhertzEntitycathode ray tubeEntitywireless communicationEntityInformation AgeEntityVladimir K. ZworykinEntitypulse-code modulationEntityDigital Video BroadcastingEntityKerr effectEntityphotoconductivityEntityhistory of videotelephonyEntityParisEntityBerlinEntityNew York CityCityInternetEntityWorld War IIConceptartEntitySoviet UnionConcepttelevisionEntityThomas EdisonEntityCategoriesHistory of telecommunicationsTelecommunications-related introductions in 1925Television technologyVideoVideotelephony