Sony Xperia 10 Reference Guide - Page 21

The level of radiation emitted by the device

Get Sony Xperia 10 PDF manuals and user guides View all Sony Xperia 10 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 21 highlights

Bulletin on radiation emitted by mobile radiotelephone end-user equipment (henceforth: "cellular device") - Summary of guidelines issued by the Ministry of Health • Use a speaker or cable-connected personal headset or earphone (not a wireless one). • Keep the cellular device away from your body. • Limit the amount and duration of use. • Avoid using the device in areas where the signal is poor. • Avoid using the device in places such as elevators and trains, where electromagnetic shielding causes reception interference. • Avoid using the device while driving and always abide by the law's provisions. • Adhere to the rules with special caution in the case of children and instruct them carefully how to use a cellular device safely. • Limit the use of cellular devices by children. • Use accessories that diminish the exposure to radiation, such as speaker or cable-connected (not wireless) headset. • Beware that damage, repair, or modifications made to the original configuration of the cellular device may alter the level of radiation emitted. What is a cellular device? A cellular device is a device that allows wireless electronic communication over radio waves. For this purpose, the device is equipped with a receiver and a transmitter, which maintain its connection to the nearest base station in its vicinity, where the radio signal transmission and reception antennas are located. The antennas in the base station as well as the cellular device produce radio emission in the process of cellular communication. The level of radiation emitted by the cellular device is lower than that which is emitted by the cellular transmission center (cellular site), but as it is normally held right near the user's body, the radio energy is directly absorbed from the cellular device's antenna. The device operates in a frequency range of 800 to 2200 MHz. The maximum output of most cellular devices currently in use is 0.6 watt. What is radio emission? Radiation is the travel of energy through space or matter. Radiation may be classified as follows according to the level of energy transmitted: • Ionizing radiation (which carries enough energy to alter the structure of atoms or molecules by liberating electrons, for example, X-rays) • Non-ionizing radiation (which does not carry enough energy to alter the structure of atoms or molecules, for example, radio waves) Radio waves are non-ionizing electromagnetic waves, the frequency of which is lower than those of visible light, X-rays, or gamma rays. The level of radiation emitted by the device When using a cellular device, exposure of the head of the user to radio waves is relatively high. The level of exposure to radiation emitted by cellular devices is based on a measuring unit known as SAR (which stands for Specific Absorption Rate) that describes the quantity of radiant energy absorbed per unit of mass of tissue, such as the human body. When measured, SAR is expressed in W/kg or mW/g. Manufacturers perform SAR level tests, where a complete and fully functional device is laboratory tested. The actual SAR level emitted by the devices varies in fact. Generally, the closer the cellular device is to the base station antenna, the lower the emitted SAR level compared with cases in which the cellular device is further away from the base station antenna, or the signal reception in a given location is poor. The SAR measuring process is highly complicated and there are only a few laboratories in the world that are qualified to perform SAR testing. Manufacturers of cellular devices are compelled to have their devices undergo rigorous SAR testing (for maximum transmission capacity) in compliance with the American or European regulations, and specify the maximum SAR level measured. Due to the level of complexity of the test, the device does not undergo periodic SAR testing. The SAR level of the device may deviate as measured originally at any time in the product life due to possible damage, maintenance work performed, or any modifications made to its original configuration. 21 Internet version. For personal use only.

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
Bulletin on radiation emitted by mobile radiotelephone end-user equipment (henceforth: “cellular
device”) - Summary of guidelines issued by the Ministry of Health
•
Use a speaker or cable-connected personal headset or earphone (not a wireless one).
•
Keep the cellular device away from your body.
•
Limit the amount and duration of use.
•
Avoid using the device in areas where the signal is poor.
•
Avoid using the device in places such as elevators and trains, where electromagnetic shielding causes
reception interference.
•
Avoid using the device while driving and always abide by the law’s provisions.
•
Adhere to the rules with special caution in the case of children and instruct them carefully how to use a
cellular device safely.
•
Limit the use of cellular devices by children.
•
Use accessories that diminish the exposure to radiation, such as speaker or cable-connected (not
wireless) headset.
•
Beware that damage, repair, or modifications made to the original configuration of the cellular device
may alter the level of radiation emitted.
What is a cellular device?
A cellular device is a device that allows wireless electronic communication over radio waves. For this
purpose, the device is equipped with a receiver and a transmitter, which maintain its connection to the
nearest base station in its vicinity, where the radio signal transmission and reception antennas are located.
The antennas in the base station as well as the cellular device produce radio emission in the process of
cellular communication. The level of radiation emitted by the cellular device is lower than that which is
emitted by the cellular transmission center (cellular site), but as it is normally held right near the user’s
body, the radio energy is directly absorbed from the cellular device’s antenna. The device operates in a
frequency range of 800 to 2200 MHz. The maximum output of most cellular devices currently in use is 0.6
watt.
What is radio emission?
Radiation is the travel of energy through space or matter. Radiation may be classified as follows according
to the level of energy transmitted:
•
Ionizing radiation (which carries enough energy to alter the structure of atoms or molecules by liberating
electrons, for example, X-rays)
•
Non-ionizing radiation (which does not carry enough energy to alter the structure of atoms or
molecules, for example, radio waves)
Radio waves are non-ionizing electromagnetic waves, the frequency of which is lower than those of visible
light, X-rays, or gamma rays.
The level of radiation emitted by the device
When using a cellular device, exposure of the head of the user to radio waves is relatively high. The level of
exposure to radiation emitted by cellular devices is based on a measuring unit known as SAR (which stands
for Specific Absorption Rate) that describes the quantity of radiant energy absorbed per unit of mass of
tissue, such as the human body. When measured, SAR is expressed in W/kg or mW/g.
Manufacturers perform SAR level tests, where a complete and fully functional device is laboratory tested.
The actual SAR level emitted by the devices varies in fact. Generally, the closer the cellular device is to the
base station antenna, the lower the emitted SAR level compared with cases in which the cellular device is
further away from the base station antenna, or the signal reception in a given location is poor.
The SAR measuring process is highly complicated and there are only a few laboratories in the world that are
qualified to perform SAR testing. Manufacturers of cellular devices are compelled to have their devices
undergo rigorous SAR testing (for maximum transmission capacity) in compliance with the American or
European regulations, and specify the maximum SAR level measured.
Due to the level of complexity of the test, the device does not undergo periodic SAR testing. The SAR level
of the device may deviate as measured originally at any time in the product life due to possible damage,
maintenance work performed, or any modifications made to its original configuration.
21
Internet version. For personal use only.