User's Manual

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
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
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. When you use your phone, the
cellular 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 6 mW to 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 0.01 µW to 420 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 telephones.
CM-M1300_01_07final 3/2/98, 11:40 AM4