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  2. Sony Dream Machine - Wikipedia

    en.wikipedia.org/wiki/Sony_Dream_Machine

    An FM/AM digital clock radio with a cube dimension of 4.5 inches all around. It was Probably an older generation of CXW family digital radio with more improved features like DREAM BAR on the top panel and a 9-volt battery backup at the bottom panel like C317. It must be the first model in the CXW family with the backup battery feature since it ...

  3. Radio clock - Wikipedia

    en.wikipedia.org/wiki/Radio_clock

    A modern LF radio-controlled clock. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an "atomic clock", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.

  4. Radio Data System - Wikipedia

    en.wikipedia.org/wiki/Radio_Data_System

    Radio Data System (RDS) is a communications protocol standard for embedding small amounts of digital information in conventional FM radio broadcasts. RDS standardizes several types of information transmitted, including time , station identification and program information.

  5. Alarm clock - Wikipedia

    en.wikipedia.org/wiki/Alarm_clock

    A mid-1940s alarm clock radio with AM radio stations only A typical 1980s clock radio featuring a digital clock/alarm and an analogue FM/MW/LW receiver. A clock radio is an alarm clock and radio receiver integrated in one device. [18] The clock may turn on the radio at a designated time to wake the user, and usually includes a buzzer alarm ...

  6. HD Radio - Wikipedia

    en.wikipedia.org/wiki/HD_Radio

    Digital radio, such as DAB, DAB+, and HD FM often have smaller coverage of markets as compared to analog FM, radios are more expensive, and reception inside vehicles and buildings may be poor, depending on the frequencies used. HD Radio shares most of these same flaws (see criticisms below). On the other hand, digital radio allows for more ...

  7. Digital clock - Wikipedia

    en.wikipedia.org/wiki/Digital_clock

    Basic digital alarm clock without a radio. The mark in the top-left of the display indicates that the time is 4:00pm (16:00), not 4:00am. A 1969 radio alarm clock (Sony Digimatic 8FC-59W) with an early mechanical-digital display. A digital clock displays the time digitally (i.e. in numerals or other symbols), as opposed to an analogue clock.