Namuhla, izindlela ezisetshenziswa kakhulu zokuguquguquka ekusakazweni komsakazo yi-AM ne-FM. Emlandweni, ukusakazwa kwe-AM kwavela emashumini eminyaka ngaphambili kunokusakazwa kwe-FM, kodwa ekugcineni, abantu bamukela i-antenna yokusakaza ye-FM ekusakazeni umsakazo kakhulu. Nakuba i-AM isabaluleke kakhulu, isetshenziswe kancane. Kungani sidinga i-FM ekusakazeni emsakazweni? Lesi sihloko sizophendula lo mbuzo ngokuqhathanisa umehluko phakathi kwe-AM ne-FM. Ake siqale!

Ukwabelana Kuyanakekela!

Okuqukethwe 

Izinhlobo Zokusakazwa Kwemisakazo

Masiqale sifunde nge-AM ne-FM. Ekusakazweni komsakazo, kunezindlela ezintathu eziyinhloko zokuguquguquka: ukuguquguquka kwe-amplitude, ukuguquguquka kwefrikhwensi, nokuguquguquka kwesigaba. I-modulation yesigaba ayikasetshenziswa kabanzi okwamanje. Futhi namuhla sigxile ekuxoxeni ngokuguquguquka kwe-amplitude kanye nokuguqulwa kwemvamisa.

Ukushintshashintsha Kwezinga Lokulinganisa

I-AM isho ukuguqulwa kwe-amplitude. Njengoba igama liphakamisa, imelela ulwazi lwezimpawu zomsindo ngokusebenzisa i-amplitude yamaza omsakazo. Ekuguquguqukeni kwe-amplitude, i-amplitude yesithwali, okungukuthi, amandla esignali ashintsha ngokulingana nobude besiginali yomsindo. Ekusakazweni komsakazo, i-AM isakaza kakhulu ngegagasi elide kanye negagasi eliphakathi nendawo, futhi amabhendi efrikhwensi ahambisanayo ikakhulukazi amabhande amafrikhwensi aphansi kanye namabhande aphakathi nendawo (ububanzi obukhethekile buhluka kancane ngokuya ngemithetho yamazwe ahlukahlukene). I-Am ivame ukusetshenziswa eziteshini zomsakazo zamagagasi amafushane, iziteshi zomsakazo ze-amateur, iziteshi zomsakazo ezimbili, iziteshi zomsakazo zebhendi yomphakathi, njalonjalo.

Ukushintshwa Kwemvamisa

I-FM isho ukuguqulwa kwemvamisa. Ngokungafani ne-AM, imele ulwazi lwamasignali alalelwayo ngokusebenzisa imvamisa yamaza omsakazo. Ekushintshanisweni kwefrikhwensi, imvamisa yesignali yenkampani yenethiwekhi (inani lezikhathi lapho ishintsha khona isiqondiso ngesekhondi) iyashintsha ngokuya ngokushintsha kwesignali yomsindo. Ekusakazweni komsakazo, kusakazwa ikakhulukazi ngamabhendi amafrikhwensi e-VHF, futhi ibanga elithile lefrikhwensi ngu-88 - 108MHz (ngokufanayo, imithethonqubo yamazwe athile noma izifunda ihlukile).

Nakuba i-AM ne-FM zidlala indima efanayo ekusakazeni umsakazo, izici zazo ekusakazeni nazo zihlukile ngenxa yezindlela ezihlukene zokuguquguquka, futhi sizokuchaza kabanzi engxenyeni elandelayo.

Uyini Umehluko Phakathi kwe-AM ne-FM?

Umehluko phakathi kwe-AM ne-FM ubonakala kakhulu kulawa maphuzu:

I-Anti-interference Amandla

Inhloso yokuqala yokusungulwa kobuchwepheshe be-FM iwukunqoba inkinga yokuthi isignali ye-AM kulula ukuthi iphazamiseke. Kodwa i-FM isebenzisa ukuguqulwa kwemvamisa ukuze imele ulwazi lomsindo, ngakho-ke ngeke ithintwe ukushintsha kwe-amplitude yesiginali yomsindo. Ngokuvamile, amasignali e-FM akulula ukuthi angaphazanyiswa.

Ikhwalithi yokudlulisela 

Isiteshi ngasinye se-AM sithatha umkhawulokudonsa ongu-10KHz, kuyilapho isiteshi ngasinye se-FM sithatha umkhawulokudonsa ongu-200kHz. Lokhu kusho ukuthi amasiginali we-FM angaphatha ulwazi oluningi lomsindo futhi adlulisele isignali yomsindo ngaphandle kokuhlanekezela. Ngakho-ke, amasiginali we-FM avame ukusetshenziswa ukusakaza izinhlelo zomculo, kuyilapho amasiginali we-FM evame ukusetshenziswa ukusakaza izinhlelo ezikhulumayo.

Ibanga lokudlulisa

Amasignali e-Am asakaza amaza omsakazo anamaza aphansi noma amaza amade amade, okusho ukuthi angahambela kude futhi angene ezintweni eziningi, njengezintaba. Nokho, isignali ye-FM ivinjwa kalula yizithiyo. Ngakho-ke, olunye ulwazi olubalulekile, njengesibikezelo sezulu, ulwazi lwethrafikhi, njll., ludluliselwa ngamasignali e-AM. Ngesikhathi esifanayo, kwezinye izindawo ezikude noma izindawo ezinezintaba, badinga i-AM yokusakaza ngomsakazo.

Izindleko Zokwakha

Ngenxa yokuthi ukusakazwa kwe-FM kuyinkimbinkimbi kakhulu kunokusakaza kwe-AM, izinkampani zokusakaza zidinga ukushintsha lawo ma-transmitter omsakazo we-FM ngezakhiwo zangaphakathi eziyinkimbinkimbi kanye nezindleko eziphezulu. Ngaso leso sikhathi, ukuze bahlanganise idolobha lonke ngangokunokwenzeka, badinga futhi ukuthenga ama-transmitter amaningi noma ezinye izinhlelo zokusakaza ezisetshenziselwa ukunweba ibanga lokusakaza (njenge-Studio Transmitter Link), ngokungangabazeki ezinyusa kakhulu izindleko zokwakha imishini yokusakaza. izinkampani.

Ngenxa yezinga elihle kakhulu lokusakaza le-FM, selisetshenziswe emkhakheni wokusakaza umsakazo kakhulu kusukela yavela ngo-1933. Ungathola imikhiqizo eminingi ehlobene, Abasakazi be-FM, imisakazo ye-FM, izimpondo ze-FM, njll, ezisetshenziswa kakhulu ezinsizeni ezizimele nezikahulumeni njengomsakazo wemoto, izinsiza zokushayela, iphathi kaKhisimusi, iziteshi zomsakazo zomphakathi, iziteshi zomsakazo zedolobha, njll. eziteshini ze-fm ezinamandla amancane:

I-50W FM Radio Broadcast Transmitter ehamba phambili I-FMT5.0-50H - Funda kabanzi

imibuzo ejwayelekile ukubuzwa

1. Umbuzo: Ingabe Ukusebenzisa Isiteshi Se-FM Esinamandla Aphansi Kusemthethweni?

IMP: Kuncike emithethweni yangakini Yezokusakaza Ngomsakazo. 

Emazweni amaningi emhlabeni jikelele, ukusebenzisa isiteshi se-FM esinamandla aphansi kuyadingeka ukuze ufake isicelo samalayisensi kubaphathi bendawo be-FM ne-TV, noma uzohlawuliswa. Ngakho-ke, sicela uthintane nemithetho yendawo emsakazweni womphakathi kabanzi ngaphambi kokusungula isiteshi se-FM esinamandla amancane.

2. Q: Yiziphi Izisetshenziswa Ezidingekayo Ukuze Kwethulwe Isiteshi Somsakazo Se-FM Esinamandla Aphansi?

IMP: Uma ufuna ukuqala isiteshi somsakazo se-FM esinamandla aphansi, uzodinga uchungechunge lwemishini yokusakaza yomsakazo, okuhlanganisa imishini yesiteshi se-FM kanye nemishini yesiteshi se-studio.

Nalu uhlu lwezinto zokusebenza eziyisisekelo ozidingayo:

• Umsakazi we-FM;
• amaphakheji wezinti ze-FM;
• izintambo ze-RF;
• Izesekeli ezidingekayo.

Uma ufuna ukwengeza izisetshenziswa ezengeziwe esiteshini somsakazo we-FM, nalu uhlu lwakho:

• Isixhumi somsindo;
• Iphrosesa yomsindo;
• Imakrofoni;
• Isitendi semakrofoni;
• Ikhava ye-BOP;
• Isipikha sokuqapha sekhwalithi ephezulu;
• Ama-headphone;
• Umsabalalisi wamahedfoni;
• njll

3. Q: Yiziphi Izinzuzo Zama-Transmitter FM anamandla aphansi?

IMP: Uma kuqhathaniswa nezisakazisi ze-FM ezinamandla aphezulu, izidluliseli ze-FM ezinamandla aphansi zilula, zihamba kalula, futhi zinobungane kakhulu kwabaqalayo.

Ngenxa yesisindo sayo esilula kanye nevolumu encane, kulula kakhulu ukuthi abantu bayisuse. Ngaphezu kwalokho, ukusebenza okulula kwenza abantu bazi ukuthi bangayisebenzisa kanjani ngesikhathi esifushane. Yehlisa izindleko zabasebenzi kuzo zonke izici. 

4. Q: Yiziphi Ezinye Izicelo Engasetshenziswa Kuzo Isidluliseli Se-FM Esinamandla Aphansi?

IMP: Ingasetshenziswa ochungechungeni lwezinsizakalo zokusakaza zomphakathi futhi ihlangabezane nezidingo zokusakaza ezizimele.

Ama-FM anamandla aphansi angasetshenziswa ezinhlelweni eziningi ezahlukahlukene ngaphezu komsakazo wemoto, izinsiza zokushayela, iphathi kaKhisimusi, iziteshi zomsakazo zomphakathi, iziteshi zomsakazo zamadolobha, okubandakanya ukusakazwa kwezikole, ukusakazwa kwezitolo ezinkulu, ukusakazwa kwepulazi, isaziso sasefekthri, ibhizinisi. ukusakazwa kwengqungquthela, ukusakazwa kwezindawo ezinobuhle, ukukhangisa, izinhlelo zomculo, izinhlelo zezindaba, ukusakazwa bukhoma kwangaphandle, ukukhiqizwa kwedrama ebukhoma, izikhungo zokuhlunyeleliswa kwezimilo, ukusakazwa kwezindlu ezithengiswayo, ukusakazwa komthengisi, njll.

Qala Isiteshi Somsakazo We-FM Manje

Nakwabaqalayo akunzima ukuzisungulela umsakazo wabo. Njengabanye, badinga imishini yesiteshi somsakazo esezingeni eliphezulu futhi ethengekayo kanye nomphakeli onokwethenjelwa. Futhi yingakho bekhetha i-FMUSER. Ku-FMUSER, ungathenga amaphakheji eziteshi zomsakazo we-FM ngentengo yebhajethi, okuhlanganisa Imishini yomsakazo we-FM iyathengiswa, izimpondo ze-FM ezithengiswayo, nezinye izesekeli ezidingekayo. Uma ufuna ukwakha isiteshi sakho somsakazo, sicela ukhululeke Xhumana nathi khona manje!

Funda futhi

• Yiziphi Izinsizakusebenza Zokusakaza Ukhozi FM Ozidingayo Emsakazweni Womphakathi?
• Izinto Ezi-5 Okufanele Uzicabange Ngaphambi Kokuthenga I-FM Broadcast Transmitter
• Yiziphi Izinsizakusebenza Zokusakaza ze-FM ozidingayo e-Drive-in Church?