There are basically two radio broadcast bands as we know them. One is the AM (amplitude modulation) band, and the other is the FM (frequency modulation) band. The AM band is from 520 KHz to 1700 KHz (0.52 MHz to 1.7 MHz). The FM band is from 87.5 MHz to 108.0 MHz. Other bands are used commercially, but these two bands represent the broadcast bands used in the U.S.
Note: 1 KHz = 1,000 Hz (Hertz, cycles per second, or cps), and 1 MHz = 1,000,000 Hz
In the USA ...
-- Commercial AM radio stations operate with carrier frequencies
spaced every 10 KHz between 550 KHz and 1700 KHz.
-- Commercial FM radio stations operate with carrier frequencies
spaced every 200 KHz between 88.1 MHz and 107.9 MHz.
Commercial radio broadcasting ... plain old AM and FM, not TV or "satellite" radio ... is
allocated the frequency bands of 550 KHz to 1650 KHz (AM), and 88 MHz to 108 MHz (FM),
in the USA.
In the U.S., the AM radio band takes up the spectrum from 520 kHz to 1610 kHz. The FM radio band takes up the spectrum from 87.5 MHz to 108 MHz. Other bands are used in different parts of the world. And there are some other definitions of commercial radio that might be used which would require us to block out more chunks of the electromagnetic (EM) spectrum. These vary a bit from area to area as well.
Radio frequency range, as determined by FCC in the US:
AM: 535 kHz - 1.7 MHz
SW: 5.9 MHz - 26.1 MHz
TV: 54 MHz - 220 MHz
FM: 88 MHz - 108 MHz
In addition, all wireless communications use radio waves, ranging from 40 MHz to tens of GHz.
We generate and detect radio waves for purposes of communication, cooking, and
scientific investigation, in the frequency range of roughly 30 KHz to 300 GHz,
corresponding to wavelengths between 10,000 meters and 1 millimeter.
In the USA ...
-- Commercial AM radio stations operate with carrier frequencies spaced every 10 KHz
between 550 KHz and 1700 KHz.
-- Commercial FM radio stations operate with carrier frequencies spaced every 200 KHz
between 88.1 MHz and 107.9 MHz.
There have been suggestions, and even a few formal approaches to the FCC, to
change these bands, since this question started showing up on WikiAnswers. But
the idea has no serious momentum, and all of the previous repetitions of the answer
still apply.
Each frequency on the following list does:
Commercial AM broadcast uses frequencies between 550,000 Hz to 1,700,000 Hz.
Commercial FM broadcast uses frequencies between 88 MHz to 108 MHz. (million Hz)
An AM-modulated transmission can be operated on any radio frequency. In the USA, AM commercial broadcast stations are assigned carrier frequencies between 550 KHz and 1.7 MHz.
"Longer wavelength" always means lower frequency.
Radio stations use a broadcasting antenna to transmit electromagnetic waves at literally hundreds of thousands of watts. This transmission is modulated, (tuned), at a specific frequency between 87 and 108 Mhz.
Any radio signal, regardless of its frequency, can be amplitude-modulated in order to add information to it. In the US, commercial broadcast AM radio stations operate on carrier frequencies between 540 KHz and 1.7 MHz.
In the USA: All commercial AM stations are assigned frequencies in the band 550-1620 KHz, in increments of 10 KHz. All commercial FM stations are assigned frequencies in the band 88-108 MHz, in increments of 100 KHz (0.1 MHz).
See page 101 of your study unit. In there you will find that radio frequencies used by commercial radio broadcasting stations range from about 550,000 Hz to 1,700,000 Hz.
In Canada, there are two radio stations broadcasting on 1320 AM. The Vancouver area picks up radio station CHMB at that frequency, while the Oakville, Ontario area receives radio station CJMR.
The frequency that falls in the range of RF waves used by commercial radio broadcasting stations is 3 kHz to 300 GHz. This is the frequency of radio waves and the alternating currents that carry them.
An AM-modulated transmission can be operated on any radio frequency. In the USA, AM commercial broadcast stations are assigned carrier frequencies between 550 KHz and 1.7 MHz.
In the USA ... -- Commercial AM radio stations operate with carrier frequencies spaced every 10 KHz between 550 KHz and 1700 KHz. -- Commercial FM radio stations operate with carrier frequencies spaced every 200 KHz between 88.1 MHz and 107.9 MHz.
"Longer wavelength" always means lower frequency.
Radio stations use a broadcasting antenna to transmit electromagnetic waves at literally hundreds of thousands of watts. This transmission is modulated, (tuned), at a specific frequency between 87 and 108 Mhz.
Because different radio stations broadcast at different frequencies, and the radio tuner lets you decide which frequencies to listen to. Radio station owners have to buy the rights to use a particular frequency within a particular area. When you are driving sometimes you will hear two stations overlapping as you move out of the range of one station and into the range of another that is broadcasting on the same frequency.
Any radio signal, regardless of its frequency, can be amplitude-modulated in order to add information to it. In the US, commercial broadcast AM radio stations operate on carrier frequencies between 540 KHz and 1.7 MHz.
Public broadcasting is TV, Radio, etc funded by an official or governments, with No paid advertisements. Commercial broadcasting on the other hand is TV funded by paid advertisements and contain advertisements during the TV or radio times.
G. Valet has written: 'Receiving and measuring stations for broadcasting purposes' -- subject(s): Radio broadcasting, Radio measurements
In the USA: All commercial AM stations are assigned frequencies in the band 550-1620 KHz, in increments of 10 KHz. All commercial FM stations are assigned frequencies in the band 88-108 MHz, in increments of 100 KHz (0.1 MHz).