- Тип техники
- Бренд
Просмотр инструкции сотового gsm, смартфона Sony CM-B1200, страница 4
4
The Institute of Electrical and
Electronics Engineers (IEEE) in 1991,
and The American National Standards
Institute (ANSI) in 1992, updated the
1982 ANSI Standard for safety levels
with respect to human exposure to RF
energy. Over 120 scientists, engineers,
and physicians from universities,
government health agencies, and
industry, reviewed the available
research and developed this updated
Standard. In March 1993, the U.S.
Federal Communications Commission
(FCC) proposed the adoption of this
updated Standard.
The design of your phone complies with
this updated Standard. Of course, if you
want to limit RF exposure even further
than the updated ANSI Standard, you
may choose to control the duration of
your calls and operate your phone in
the most power efficient manner.
Efficient phone operation
For your phone to operate at the lowest
power level consistent with satisfactory
call quality, please observe the
following guidelines:
Your phone has an extendable antenna;
extend it fully whenever possible for
maximum efficiency.
Hold the phone as you would any other
telephone. While speaking directly into
the mouthpiece, position the antenna up
and over your shoulder.
Do not hold the antenna when the
phone is in use. Holding the antenna
affects call quality and may cause the
phone to operate at a higher power level
than needed.
Safety precautions
IMPORTANT
For safe and efficient operation of
your phone, observe these guidelines.
Your dual mode (analog/digital CDMA)
hand-held portable cellular/PCS
telephone uses both analog frequency
modulation (FM) technology and digital
Code Division Multiple Access (CDMA)
technology. CDMA is a newer radio
frequency (RF) technology than the FM
technology that has been used for radio
communications for decades.
Your dual mode portable cellular/PCS
telephone is a radio transmitter and
receiver. When the phone is ON, it
receives and sends out radio frequency
(RF) energy. The phone operates in the
frequency range of 824 MHz to 894 MHz
in analog mode, and 1851 MHz to 1989
MHz in digital CDMA mode. When you
use your phone, the cellular/PCS system
handling your call controls the mode of
operation (analog or digital CDMA) and
the power level at which your phone
transmits.
In the analog mode, the
power is continuously transmitted at a
level that can range from about 6 mW to
about 600 mW. In the digital CDMA
mode, the power is transmitted as a
digitally coded waveform at a rate
varying from 100 Hz to 800 Hz. The
average power can range from about
0.01 µW to about 300 mW.
Exposure to radio frequency
energy
Research on health effects from RF
energy has focused for many years on
FM radio technology. That research and
studies regarding newer radio
technologies, such as CDMA, have
found no credible scientific evidence
that adverse health effects result from
the use of cellular/PCS telephones.
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