Radio: Béda antarrépisi

[[Image:Fisher 500 radio.jpg|right|thumb|A''Receiver Fisher 500hi-fi AM/FM'' hi-fiFisher 500 ti receivermangsa fromtaun 1959.]]

[[AM broadcasting|AMRadio broadcastsiaran radioAM]] sendsngirimkeun musicmusik andjeung voiceucapan indina thespékrum gelombang radio MediumFrékuénsi FrequencySedeng (MF—0.300 MHz tonepi ka 3 MHz). radio spectrum. Radio AM radio usesngagunakeun [[amplitudemodulasi modulationamplitudo]], indimana whichamplitudo thesinyal amplitudepamawa ofdirobah theproporsional transmittedjeung signalamplitudo issora madeanu proportional to the sound amplitude capturedkatangkep (transduceddi-trandusi) by the microphoneku whilemikropon thesedengkeun transmittedfrékuénsina frequencytetep remainshenteu unchangeddirobah. Pangiriman Transmissionssinyal arecara affectedkieu bykeuna staticku andgangguan interferencelistrik becausestatik lightningjeung andinterférensi otherlantaran sourceskilat ofsarta radiosumber thatgangguan arelianna transmittinganu atmancar thedina samefrékuénsi frequencyanu addsarua theirngarobah amplitudesamplitudo tosinyal theanu originaldipancarkeun. transmittedUkuran amplitude.daya paling Thegedé mostanu wattagedimeunangkeun anpikeun AMstasiun radio station inAM thedi [[UnitedAmérika StatesSarikat]] isnyaéta allowed to use is 50,000 watts andsarta thekalolobaan majoritystasiun ofanu stationsmancar thatsakuat emitieu signalsgeus thiskarolot; powerful were grandfathered in;stasiun-stasiun theseieu includediantarana [[WGN (AM)]], [[WJR]], andsarta [[CKLW]]. InDina taun 1986 [[KTNN]] receivedngarupakeun thestasiun lastpamungkas grantedanu narima idin operasi dina 50,000 watt license.

[[FM broadcasting|FMRadio broadcastsiaran radioFM]] sendsngirimkeun musicmusik andjeung voiceucapan withkalayan higher''kehandalan'' (''fidelity'') thananu AMleuwih hadé tibatan radio. AM. InDina [[frequencymodulasi modulationfrékuénsi]], amplitudeparobahan variationamplitudo at thedina [[microphonemikropon]] causesnyababkeun thefrékuénsi ''transmitter'' frequencyfluktuasi. to fluctuate.Lantaran Because thesinyal audio signalngamodulasi modulatesfrékuénsi thelain frequencyamplitudo, and not the amplitude,mangka ansinyal FM signalhenteu iskeuna notku subjectgangguan tostatik staticsarta andinterférensi interferencesaperti inhalna thesinyal sameAM. wayFM asdipancarkeun AMdina signals.spéktrum gelombang FMradio isFrékuénsi transmittedLuhur inPisan theatawa ''Very High Frequency'' (VHF—30 MHz tonepi ka 300 MHz) radio spectrum. <!-- FM requiresmerlukeun spéktrum morefrekuensi radio frequencyleuwih spectrumloba thanbatan AM andsedengkeun therehal areieu morebisa frequenciesdicumponan availabledina atfrékuénsi higherluhur. frequenciesAkibatna, sodina theresiaran canFM bebisa moreaya stationsleuwih loba stasiun, eachanu sendingmasing-masingna morengirim informationinformasi leuwih loba. --> VHFGelombang radio wavesVHF actwatekna moreleuwih likemirupa lightcahaya, travelingngarambat indina straightgaris linesanu lempeng, hencesahingga thejarak receptionpanarimaan rangekawates is generally limited to aboutantara 50-100 milesmil. DuringDina unusualkondisi upperatmosfir atmosphericbagian conditions,luhur FManu signalshenteu arebiasa, occasionallysinyal reflectedFM backkadang towardsdipantulkeun thebalik Earthka bybumi theku [[ionosphereionosfir]], resulting inngakibatkeun [[TV/FM DX|Longjarak distancepancar FM receptionanu jauh]]. ''Receiver'' FM receivers are subject tokeuna theku [[capture effect]], whichanu causes thenyababkeun radio tongan onlynarima receivesinyal theanu strongestpaling signalkuat whenmangsa multipleaya signalsleuwih appearti onhiji thesinyal sameanu frequency.datang FMdina receiversfrékuénsi arenu sarua. ''Receiver'' FM relativelyrelatif immunekebal totina lightninggangguan andkilat sparkjeung interferenceinterférensi.