AmateurRadioTechnicianClassElement2Course…_4658：业余无线电技师班2元课程……

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1、GeneralLicensingClassG0A–G0BElectricalandRFSafetyYourorganizationanddateshere2GeneralClassElement3CoursePresentationELEMENT3SUB-ELEMENTSG1–Commission’sRulesG2–OperatingProceduresG3–RadioWavePropagationG4–AmateurRadioPracticesG5–ElectricalPrinciplesG6–CircuitComponentsG7–PracticalCir

2、cuitsG8–SignalsandEmissionsG9–AntennasG0–ElectricalandRFSafety3ElectricalandRFSafetyOnewaythatRFenergycanaffecthumanbodytissueisthatitheatsbodytissue.(G0A01)ThefollowingpropertiesareimportantinestimatingwhetheranRFsignalexceedsthemaximumpermissibleexposure(MPE)(G0A02)ItsdutycycleIts

3、frequencyItspowerdensityNeverstandinfrontofamicrowavefeedhornantennaOntransmit,itradiatesahighlyconcentratedbeamofRFenergyAllofthesechoicesarecorrect.4ElectricalandRFSafetyYoucandeterminethatyourstationcomplieswithFCCRFexposureregulations:(G0A03)BycalculationbasedonFCCOETBulletin65B

4、ycalculationbasedoncomputermodelingBymeasurementoffieldstrengthusingcalibratedequipment"Timeaveraging"inreferencetoRFradiationexposuremeansthetotalRFexposureaveragedoveracertaintime.(G0A04)Thegeneralequationfortimeaveragingexposureequivalenceis:Sexptexp=SlimittavgAllofthesechoicesar

5、ecorrect.5ElectricalandRFSafetyIfanevaluationofyourstationshowsRFenergyradiatedfromyourstationexceedspermissiblelimitsyoumusttakeactiontopreventhumanexposuretotheexcessiveRFfields.(G0A05)(G0A06–DeletedbyQPC)WhenevaluatingRFexposure,alowertransmitterdutycyclepermitsgreatershort-terme

6、xposurelevels.(G0A07)AnamateuroperatormustperformaroutineRFexposureevaluationtoensurecompliancewithRFsafetyregulationswhentransmitterpowerexceedslevelsspecifiedinpart97.13.(G0A08)DutyCycle6ElectricalandRFSafetyAcalibratedfield-strengthmeterwithacalibratedantennacanbeusedtoaccurately

7、measureanRFfield.(G0A09)JerrodModel704BElectro-metricsem-7530HomebrewbyKA7OEIofUtahAmateurRadioClub7ElectricalandRFSafetyIfanevaluationshowsthataneighbormightreceivemorethantheallowablelimitofRFexposurefromthemainlobeofadirectionalantenna,takeprecautionstoensurethattheantennacannotb

8、epointedintheirdire