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c(din)鿴Ԕ(x)f
l(f)ڣ[2009-3-15] [3243]Ρ
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һC(j)C(j)϶AMFMŴѽ(jng)Ϥ@ɂ(g)Á (ni)VC(j)߀SWΕr(sh)ôˇ(ni)̲_(ti)֮߀ ďV_(ti)(ji)Ŀ(du)C(j)ʹиM(jn)һJ(rn)R(sh)¾ʲôAMFMSWLWһεf
(sh)AMFMָǟo늌W(xu)ϵĶNͬ{(dio)ƷʽAM: Amplitude ModulationQ{(dio)FM: Frequency ModulationQ{(dio)lֻһвV(MW: Medium Wave){(dio)(AM)ķʽڲ֪XMWAM֮g̈́˵̖(ho)(sh)HMWֻTAM{(dio)ƷʽһNVڸl(3-30MHz)еćH̲Vʹõ{(dio)ƷʽҲAM{(dio)lVlʵĺՌ(do)ͨӍ(116-136MHz)ҲDzAMķʽֻ҂?ni)ճfAMָľвV(MW
FMҲͬMW\(yn)҂(x)TFMָһ{(dio)lV76-108MHz҇87.5-108MHzձ76-90MHz(sh)FMҲһN{(dio)Ʒʽʹڶ̲(ni)27-30MHz֮gI(y)_(ti)̫l(wi)ͨӍ(yng)õIJΣҲв{(dio)lFMʽ
SW䌍(sh)fnj(du)̲һNηQ_f(yng)ԓǸl(HF:High Frequency)^N̲@QôأԲLв(MW)200-600()֮gHFIJLs10100()֮gcIJL^HFIJLĴ_ǶЩ˾ͰHFQ̲(SW: Short Wave
ͬӵвMWlʵ150KHz-284KHz֮g@һlVҲVõģԲLs10002000()֮gMW200-600^@Ȼ"L"˾Ͱ@lVďVQL(LW: Long Wave)(sh)HϣՓL(LW)в(MW)Ƕ̲(SW)DzAM{(dio)Ʒʽ
(du)һ()C(j)F(xin)MMWLWṩ (ni)Võģ҇Ŀǰ]O(sh)LW_(ti)SW΄tҪ (ni)/Hh(yun)xV.
dֻfϢվ^c(din)C(sh)ϢHD(zhun)dՈ(qng)ע̎
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2013꽛(jng)(j){(ln)Ƥl(f)(hu)(sh)
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҇C(j)еڵڅݷ
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