Video: Qhov twg muaj zog AM lossis FM?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Hauv AM , lub xov tooj cua yoj hu ua "carrier" lossis "carrier yoj" yog hloov kho hauv amplitude los ntawm lub teeb liab uas yuav tsum tau xa mus. FM yog tsawg nws cuam tshuam ntau dua AM . Txawm li cas los xij, FM Cov teeb liab raug cuam tshuam los ntawm kev cuam tshuam lub cev. FM muaj zoo dua suab zoo vim muaj ntau dua bandwidth.
Hauv qhov no, qhov twg mus deb dua AM lossis FM?
Cov kab hauv qab: AM cov teeb liab yuav nqa tau ntau nyob deb (ntau pua mais, qee zaum) tab sis lawv raug cuam tshuam los ntawm huab cua thiab lwm yam huab cua. FM Cov teeb liab feem ntau yog huv dua thiab tsis cuam tshuam los ntawm qhov chaw zoo li qub, tab sis lawv kuj ua tsis tau taug kev rau kev deb.
Qhov thib ob, vim li cas AM suab phem dua FM? AM stands rau Amplitude Modulation thiab muaj cov neeg pluag suab zoo piv nrog FM , tab sis nws yog pheej yig dua rau kev xa tawm thiab tuaj yeem xa tawm mus ntev - tshwj xeeb yog hmo ntuj. Qhov qis zaus ntawm cov band peb siv rau AM signals tsim ib lub wavelength uas yog loj heev.
Ntxiv mus, qhov zoo ntawm AM tshaj FM yog dab tsi?
Lub ntsiab qhov zoo ntawm FM tshaj AM yog: Txhim kho teeb liab rau suab nrov piv (kwv yees 25dB) w.r.t. rau txiv neej ua cuam tshuam. Me me ntawm thaj chaw cuam tshuam ntawm cov chaw nyob sib ze. Tsawg zog hluav taws xob.
Hom xov tooj cua twg AM lossis FM tsim suab zoo dua?
Cov ntsiab lus hauv cov teeb no (20) xov tooj cua lub t.v. Ib txoj hauv kev xa cov teeb liab los ntawm kev hloov qhov zaus ntawm nthwv dej. FM xov tooj cua txhob taug kev deb li AM , mas FM xov tooj cua tau txais kom meej meej thiab tsim suab zoo dua tshaj AM waves.
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