KPOP (94.3 FM) is a radio station licensed to serve the community of Hartshorne, Oklahoma. The station is owned by Heartbeat Oklahoma LLC. It airs a contemporary Christian format….KPOP (FM)

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Top 10 Radio Stations in the United States

• WTOP. Washington’s Top News. Washington, D.C.
• KIIS-FM. Los Angeles, California. Contemporary Hit Radio.
• KBIG-FM. Los Angeles, California.
• WLTW-FM. New York, New York.
• WHTZ-FM. New York, New York.
• WFAN-FM. New York, New York.
• 1010 WINS. New York, New York.
• WCBS-AM. New York, New York.

XERF is the most powerful commercial radio station in North America and the third most powerful in the world. With its mammoth transmitter across the Rio Grande in Ciudad Acuna, Mexico, XERF can increase its signal up to five times the 50,000-watt limit allowed by the U.S. Federal Communications Commission.

Car, Boat, & Other Radios (Mobile & Fixed-Mount)

Nevertheless, AM radio has been in decline for years, with many AM stations going out of business each year. Now there are only 4,684 left as of the end of 2015. AM is dying for a lack of listeners. Only 10 to 20 % of all radio listeners listen to it, and that depends upon the locale.

The new band also had room for many more stations. The decline in AM audio was due more to regulation than to method of modulation. One aspect of radio not understood by most listeners is the concept of occupied bandwidth, or the amount of spectrum that a station uses to transmit its signal.

AM stands for “Amplitude Modulation”, as AM radio signals vary their amplitude to adapt to the sound information that is being broadcasted through the wavelengths.

AM signals can be harder to hear at night than they are in the daytime. Each day, between sunset and sunrise, distant AM signals can reflect off the upper layers of the atmosphere and be reflected back to ground hundreds of miles away, causing interference to local stations.

With FM, the frequency (the number of times each second that the current changes direction) of the carrier signal is varied. FM signals have a great advantage over AM signals. Both signals are susceptible to slight changes in amplitude. With an AM broadcast, these changes result in static.

Amplitude Modulation

AM broadcasts use longer wavelength radio waves than FM broadcasts. Because of their longer wavelengths, AM waves reflect off a layer of the upper atmosphere called the ionosphere. In FM broadcasts, sound signals are encoded by changing the frequency of radio waves.

The main advantages of FM over AM are: Improved signal to noise ratio (about 25dB) w.r.t. to man made interference. Smaller geographical interference between neighboring stations. Less radiated power.

Explanation: The disadvantage of FM over AM is that in frequency modulation large bandwidth is required. While, in case of advantages, FM is less prone to noise interference and has lower power consumption compared to AM.

Usually, a high-frequency sine wave is used as a carrier wave signal. These modulation techniques are classified into two major types: analog and digital or pulse modulation.

FM broadcasting is capable of higher fidelity—that is, more accurate reproduction of the original program sound—than other broadcasting technologies, such as AM broadcasting. Therefore, FM is used for most broadcasts of music or general audio (in the audio spectrum).

Frequency modulation

FM (or PM) transmitters are more complex than AM because the variation of modulating signal has to be converted and detected from the corresponding variation in frequencies. 12. AM receivers are very less susceptible to noise because noise affects the amplitude, which is where information is stored in AM signals.