What do AM and FM stand for?
AM and FM modulated signals for radio. AM (Amplitude Modulation) and FM (Frequency Modulation) are types of modulation (coding). The electrical signal from program material, usually coming from a studio, is mixed with a carrier wave of a specific frequency, then broadcast.
Why do American radio stations have weird names?
You use callsigns. They’re especially important for two-way communication but commercial broadcast stations are still assigned them by the FCC and are required to announce them at the top of each hour. This is the only good explanation of the “weird” station names.
Why are call letters W and K?
All stations east of the Mississippi River were to start with W, while stations located west of the Mississippi would start with a K. However, there are a few exceptions. That’s why many stations near the border have letters that start with both letters. So the simple answer is, the W and K came from the US government.
Why do some radio stations have 3 call letters?
Organized broadcasting began in the U.S. in the early 1920s on the AM band — FM and television did not exist yet. … Since then, three-letter calls have only been assigned to stations, including FM and TV, which are historically related to an AM station that was originally issued that call sign.
Which is better AM or FM?
FM is less prone to interference than AM. However, FM signals are impacted by physical barriers. FM has better sound quality due to higher bandwidth. … In AM radio broadcasting, the modulating signal has bandwidth of 15kHz, and hence the bandwidth of an amplitude-modulated signal is 30kHz.
What’s the difference between AM and FM radio stations?
The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to incorporate the sound information. With FM, the frequency (the number of times each second that the current changes direction) of the carrier signal is varied.
What does the W mean in radio station call letters?
In the United States, call signs begin with the letter K, W or N. N is reserved for military and government use, so we are left with K, generally for stations West of the Mississippi River and W for those East.
How many songs do radio stations have?
What do the numbers for radio stations mean?
The numbers on your radio dial represent frequencies used by your local radio stations. If the FM dial is set at 89, the radio signal you hear is broadcasted at 89 MegaHertz (MHz), or 89,000,000 cycles per second.
Why do some stations start with K?
‘ All radio stations have a four-letter identification code. … The letters ‘N’ and ‘A’ were given to military stations, but ‘K’ and ‘W’ were assigned out for commercial use. Radio stations east of the Mississippi River had to start their stations with ‘W’, and stations west of the Mississippi with ‘K’.
What does K stand for?
What does a call sign mean?
: the combination of identifying letters, letters and numbers, or words assigned to an operator, office, activity, vehicle, or station for use in communication (as in the address of a message sent by radio)
What is a radio station call sign?
In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique designation for a transmitter station. … In order to save time, two-letter identifiers were adopted for this purpose.
How do I get a call sign?
You can obtain a vanity call sign using either the Universal Licensing System or FCC Form 605, Main Form and Schedule D. There are up to three different request types for requesting vanity call signs, depending on whether the call sign is to apply to a primary or a club station.