Samsung A740 - Инструкция по эксплуатации - Страница 58

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Performance and Safety

Getting the Most Out of Your Reception

Keeping Tabs on Signal Strength

The quality of each call you make or receive depends on the signal 
strength in your area. Your phone informs you of the current signal 
strength by displaying a number of bars next to the signal strength 
icon. The more bars displayed, the stronger the signal. If you’re inside 
a building, being near a window may give you better reception.

Understanding the Power Save Feature

If your phone is unable to find a signal after 15 minutes of searching, a 
Power Save feature is automatically activated. If your phone is active, it 
periodically rechecks service availability or you can check it yourself 
by pressing any key. Anytime the Power Save feature is activated, a 
message displays on the screen. When a signal is found, your phone 
returns to standby mode. 

Understanding How Your Phone Operates

Your phone is basically a radio transmitter and receiver. When it's 
turned on, it receives and transmits radio frequency (RF) signals. 

When you use your phone, the system handling your call controls the 
power level. This power can range from 0.006 watts to 0.2 watts in 
digital mode.

Knowing Radio Frequency Safety

The design of your phone complies with updated NCRP standards 
described below.

In 1991-92, the Institute of Electrical and Electronics Engineers (IEEE) 
and the American National Standards Institute (ANSI) joined in 
updating ANSI's 1982 standard for safety levels with respect to human 
exposure to RF signals. More than 120 scientists, engineers and 
physicians from universities, government health agencies and 
industries developed this updated standard after reviewing the 
available body of research. In 1993, the Federal Communications 
Commission (FCC) adopted this updated standard in a regulation. In 
August 1996, the FCC adopted a hybrid standard consisting of the