MC101 Week 6 Notes: Radio
MC101 Week 6 Notes: Radio MC101
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This 3 page Class Notes was uploaded by Dempsey Hankins on Friday September 30, 2016. The Class Notes belongs to MC101 at Southeast Missouri State University taught by Dr. Jim Dufek in Fall 2016. Since its upload, it has received 53 views. For similar materials see Mass Communication and Society in Mass Media Communication at Southeast Missouri State University.
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Date Created: 09/30/16
MC101 WEEK 6 NOTES Chapter 5: Radio Radio Paper is due October 27 . o Listen to 3 different nonmusical programs o 2 page review Radio Chapter 5 o Radio wave— transmit music, conversations, pictures and data invisible through the air often over millions of miles—it happens every day in 1,000s of way! o All Wireless technology uses radio waves. o Thay have totally changed society though they are invisible. o A radio wave is an electromagnetic wave that broadcasts away by an antenna. Radio waves have a different frequency and by turning a radio receiver to a specific frequency you can pick up a specific signal. o Waves came in a cycle of motion. Cycles per second (CPS) o Named after Hennrich Hertz (Hz) Kilohertz (Khz) =thousands of CPS Megahertz (Mhz)= millions of CPS Gigahertz (Ghz) = billions of CPS o TEST QUESTION Amplitude—the size of the wave. Frequency—the cycle (speed) of the wave. o Electromagnetic spectrum a form of radiant energy that surrounds the earth a natural phenomenoma that includes sound, light, and radio waves has 3 characteristics: moves at he same velocity is wave like radiates outward All forms attenuate—akadrop off after a distance Attenuation is determined by power of signal and height o In the U.S. the FCC decides who is able to use which frequencies for which purposes and it issues licenses to stations for specific stations o TEST QUESTION Amplitude modulation (AM radio) was the dominat method of broadcasting during the first 80 years of the 20 century and remains widely used today. Distinction: AM has the largest waves but the signal is determined by the SUN. During the day, the signal is small because of the sun’s electromagnetic forces, but at night, the signal can stretch for hundreds of miles. This is called the “skywave effect” o TEST QUESTION Frequency Modulation (FM radio) is cleaner because the amplitude is set. It is usually immune to static. This includes TV, cordless phones, cell phones, etc. 1,000 watt= 15 miles of coverage 50,000 watt = 30 miles of coverage 100,000 watt = 60 miles of coverage Must be a line of sight (L.O.S) for FM to work. This is where power of signal and height come into play. o We then watched the radio history video. The few famous people mentioned thus far are: o Marconi—inventor of the radio o Lea De Forest o David Sarnoff—created NBC o William Paley—created CBS
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