Important Safety InformationSection 4A. Important Safety Information 201Radio Frequency (RF) EnergyUnderstanding How Your Phone OperatesYour phone is basically a radio transmitter and receiver. Whenit’s turned on, it receives and transmits radio frequency (RF)signals. When you use your phone, the system handling yourcall controls the power level. This power can range from 0.006watt to 0.2 watt in digital mode.Knowing Radio Frequency SafetyThe design of your phone complies with updated NCRPstandards 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 withrespect to human exposure to RF signals. More than 120scientists, engineers and physicians from universities,government health agencies and industries developed thisupdated standard after reviewing the available body ofresearch. In 1993, the Federal Communications Commission(FCC) adopted this updated standard in a regulation. In August1996, the FCC adopted hybrid standard consisting of theexisting ANSI/IEEE standard and the guidelines published bythe National Council of Radiation Protection andMeasurements (NCRP).Body-Worn OperationTo maintain compliance with FCC RF exposure guidelines, ifyou wear a handset on your body, use the Sprint supplied orapproved carrying case, holster or other body-worn accessory.If you do not use a body-worn accessory, ensure the antenna isat least 7/16 inch (1.5 centimeters) from your body whentransmitting. Use of non-Sprint-approved accessories mayviolate FCC RF exposure guidelines.For more information about RF exposure, visit the FCC Website at www.fcc.gov.Specific Absorption Rates (SAR) for WirelessPhonesThe SAR value corresponds to the relative amount of RFenergy absorbed into the head of a user of a wireless handset.The SAR value of a phone is the result of an extensive testing,measuring and calculation process. It does not represent howmuch RF the phone emits. All phone models are tested at theirhighest value in strict laboratory settings. But when inoperation, the SAR of a phone can be substantially less thanthe level reported to the FCC. This is because of a variety offactors including its proximity to a base station antenna, phonedesign and other factors. What is important to remember is thateach phone meets strict federal guidelines. Variations in SARsdo not represent a variation in safety.Sprint M540.book Page 201 Tuesday, April 7, 2009 3:38 PM
