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.
101.1 FM signed on in 1948 as WXYZ-FM. For most of the station's early years, the station was simply a simulcast of WXYZ AM 1270 (now WXYT AM). That changed in 1966, when the FCC decreed separate programming for at least half of the broadcast day on FM stations that had been simulcasts of their AM sisters.