The oscilloscope can be adjusted so that repetitive signals can be observed as a continuous shape on the screen.A storage oscilloscope allows single events to be captured by the instrument and displayed for a relatively long time, allowing observation of events too fast to be directly perceptible. storage oscilloscope allows single events to be captured by the instrument and displayed for a relatively long time, allowing observation of events too fast to be directly perceptible.
On 27 August 1920, regular wireless broadcasts for entertainment began in Argentina, pioneered by the group around Enrique TelÃ©maco Susini, and spark gap telegraphy stopped. On 31 August 1920 the first known radio news program was broadcast by station 8MK, the unlicensed predecessor of WWJ (AM) in Detroit, Michigan.
CB Radio Frequencies & Channels. Citizens Band (CB) radio dates back to the 1940s. The Federal Communications Commission (FCC), which still regulates CB, took bands from the Amateur Radio (a.k.a. Ham) Service's channel 11 to form a band (460-470 megacycles UHF) for personal and business communication, as well as for controlling model aircraft.