Nokia 3588i Nokia 3588i User Guide in English - Page 116

Consumer Information on Wireless Phones

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Consumer Information on Wireless Phones (The following information comes from a consumer information Web site jointly sponsored by the U.S. Food and Drug Administration (FDA) and the Federal Communications Commission (FCC), entitled "Cell Phone Facts: Consumer Information on Wireless Phones." The information reproduced herein is dated April 3, 2002. For further updates, please visit the Web site: http://www.fda.gov/cellphones/.) 1. What is radiofrequency energy (RF)? Radiofrequency (RF) energy is another name for radio waves. It is one form of electromagnetic energy that makes up the electromagnetic spectrum. Some of the other forms of energy in the electromagnetic spectrum are gamma rays, x-rays and light. Electromagnetic energy (or electromagnetic radiation) consists of waves of electric and magnetic energy moving together (radiating) through space. The area where these waves are found is called an electromagnetic field. Radio waves are created due to the movement of electrical charges in antennas. As they are created, these waves radiate away from the antenna. All electromagnetic waves travel at the speed of light. The major differences between the different types of waves are the distances covered by one cycle of the wave and the number of waves that pass a certain point during a set time period. The wavelength is the distance covered by one cycle of a wave. The frequency is the number of waves passing a given point in one second. For any electromagnetic wave, the wavelength multiplied by the frequency equals the speed of light. The frequency of an RF signal is usually expressed in units called hertz (Hz). One Hz equals one wave per second. One kilohertz (kHz) equals one thousand waves per second, one megahertz (MHz) equals one million waves per second, and one gigahertz (GHz) equals one billion waves per second. RF energy includes waves with frequencies ranging from about 3000 waves per second (3 kHz) to 300 billion waves per second (300 GHz). Microwaves are a subset of radio waves that have frequencies ranging from around 300 million waves per second (300 MHz) to three billion waves per second (3 GHz). Section 4: Safety Guidelines and Warranty Information 4A: Safety 109

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Section 4: Safety Guidelines and Warranty Information
4A: Safety
109
Consumer Information on Wireless Phones
(The following information comes from a consumer
information Web site jointly sponsored by the U.S. Food and
Drug Administration (FDA) and the Federal Communications
Commission (FCC), entitled “Cell Phone Facts: Consumer
Information on Wireless Phones.” The information reproduced
herein is dated April 3, 2002. For further updates, please visit
the Web site:
.)
1.
What is radiofrequency energy (RF)?
Radiofrequency (RF) energy is another name for radio waves. It
is one form of electromagnetic energy that makes up the
electromagnetic spectrum. Some of the other forms of energy
in the electromagnetic spectrum are gamma rays, x-rays and
light. Electromagnetic energy (or electromagnetic radiation)
consists of waves of electric and magnetic energy moving
together (radiating) through space. The area where these waves
are found is called an electromagnetic field.
Radio waves are created due to the movement of electrical
charges in antennas. As they are created, these waves radiate
away from the antenna. All electromagnetic waves travel at the
speed of light. The major differences between the different types
of waves are the distances covered by one cycle of the wave and
the number of waves that pass a certain point during a set time
period. The wavelength is the distance covered by one cycle of a
wave. The frequency is the number of waves passing a given
point in one second. For any electromagnetic wave, the
wavelength multiplied by the frequency equals the speed of
light. The frequency of an RF signal is usually expressed in units
called hertz (Hz). One Hz equals one wave per second. One
kilohertz (kHz) equals one thousand waves per second, one
megahertz (MHz) equals one million waves per second, and one
gigahertz (GHz) equals one billion waves per second.
RF energy includes waves with frequencies ranging from about
3000 waves per second (3 kHz) to 300 billion waves per second
(300 GHz). Microwaves are a subset of radio waves that have
frequencies ranging from around 300 million waves per second
(300 MHz) to three billion waves per second (3 GHz).