working frequency

Theoperatingfrequencyoftheradiowavesusedbysatellitestotransmitsignals.WorldWidebroadcastsonthefrequencyof1467～1492MHzintheL-band.Domesticsatelliteradiosareallwithinthisfrequencyrange.

Theclockspeedofacomputersystemismeasuredbyfrequency.Thecrystaloscillatorcontrolstheclockspeed.Whenvoltageisappliedtothequartzwafer,itvibratesintheformofasinewave.Thisvibrationcanberecordedbythedeformationandsizeofthewafer.Thevibrationofthecrystalisexpressedintheformofasinusoidalharmonicandachangingcurrent,andthischangingcurrentistheclocksignal.Thememoryitselfdoesnothaveacrystaloscillator,sotheclocksignalwhenthememoryisworkingisprovidedbythenorthbridgeofthemotherboardchipsetordirectlybytheclockgeneratorofthemotherboard,whichmeansthatthememorycannotdetermineitsownoperatingfrequency,anditsactualoperatingfrequencyItisdeterminedbythemotherboard.

ThemainfrequencyofthememoryisthesameasthemainfrequencyoftheCPU.Itiscustomarilyusedtoindicatethespeedofthememory,anditrepresentsthehighestoperatingfrequencythatthememorycanachieve.ThemainfrequencyofthememoryismeasuredinMHz(megahertz).Thehigherthememoryclockspeed,toacertainextent,thefasterthememorycanreach.Themainfrequencyofthememorydeterminesthemaximumfrequencyatwhichthememorycanworknormally.Atpresent,themoremainstreammemoryfrequenciesare333MHzand400MHzDDRmemory,667MHz,800MHzand1066MHzDDR2memory,1066MHz,1333MHz,1600MHzDDR3memory.