FMUSER Cikakkiyar Hanyar Sadarwar Sadarwar Juyin Juya Halin SFN

FM Single-Frequency Network (SFN Network) tsarin watsa shirye-shiryen dijital ne wanda ke amfani da masu watsa rediyo da yawa suna aiki tare don watsa sigina iri ɗaya a lokaci guda akan mitar rediyo ɗaya. Wannan tsarin yana taimakawa wajen haɓaka liyafar rediyo ta amfani da na'urori masu yawa don aika sigina iri ɗaya maimakon ɗaya kawai. Ana daidaita sigina tare da juna don samar da sigina mai ƙarfi, mafi aminci a ƙarshen mai karɓa. Wannan tsarin kuma yana taimakawa wajen rage tsangwama daga wasu tashoshi da kuma samar da mafi kyawun ɗaukar hoto a cikin wuraren da ba za a iya isa ba.

Cikakkar hanyoyin sadarwa guda ɗaya na FM (SFN Network) Magani daga FMUSER

Maganinmu za a iya bayyana shi a matsayin aikin “Networked”, wanda ya ƙunshi hanyoyin sadarwa guda uku, wato:

• FM Single Frequency Network (FM SFN Network)
• Audio Sync Transmission Network
• Cibiyar Kulawa da Kulawa Mai Nisa.

Ana iya tura waɗannan mafita cikin ingantacciyar hanya, kuma suna iya daidaita siginar rediyon FM ba tare da ɓata lokaci ba a cikin faɗuwar ɗaukar hoto tare da kayan aiki masu zuwa:

1. SFN FM Mai watsawa
2. Sync Audio Encoder
3. Sync Audio Decoder
4. GPS Standard Frequency Generator
5. Digital Standard Frequency Generator
6. Daidaita Mai karɓar Tauraron Dan Adam Audio na Dijital
7. eriya GPS (GNSS)
8. Mai Kula da Bayanan Watsa Labarai don Masu watsa FM
9. Cikakken Tsarin Gudanarwa (Software)

FMUSER SFN Hanyoyin Sadarwar Yanar Gizon Ya Bayyana

Domin ingantacciyar ingancin ginin cibiyar sadarwar SFN, ga wasu mahimman abubuwan da yakamata ku kula dasu:

• Inganta Ingantacciyar Wutar Radiated (EPR) na masu watsa SFN na kowane tashar tushe, koyaushe kiyaye shi ƙarƙashin 20% zuwa ERP na babban mai watsa SFN.
• Kula da kwanciyar hankali na bambancin jinkiri don tashar watsa sauti.
• Daidaita kwanciyar hankali da babban madaidaicin GPS.
• Ɗauki na'urar watsa FSN mai inganci

Anan akwai manyan mafita guda 4 daga FMUSER:

Mafi ƙwararru: tushen tauraron dan adam FM SFN Network Solution

Wannan bayani ya fi dacewa don watsa shirye-shiryen matakin nahiya ko yanki. Koyaya, don farawa da wannan mafita, ana buƙatar mai watsa tauraron dan adam don tashar watsa shirye-shirye, ko kuma ba za a iya watsa siginar sauti zuwa rukunin yanar gizon daidaitawa ba.

Zaɓin Nasara: Maganin hanyar sadarwa na FM SFN na tushen Cable

Wannan bayani ya fi dacewa don watsa shirye-shiryen yanki ko matakin birni. Yana aiki ta hanyar watsa siginar sauti wanda ke daidaitawa zuwa ƙarshen TV na USB tare da taimakon hanyar sadarwar fiber-coaxial (HFC) wacce aka gina ta hanyar gwamnatocin gida, sannan na'urar sync-decoder na masu amfani da ƙarshen ke watsa shi, siginar sauti. a ƙarshe za a watsa zuwa ga masu watsawa da yawa akan tashoshin daidaitawa. Ta amfani da cibiyar sadarwar HFC da ke akwai don ginin cibiyar sadarwar SFN, masu watsa shirye-shiryen suna iya adana jarin su sosai.

Zaɓin Win-Win: Magani na tushen Fiber FM SFN

Wannan bayani ya shahara ga Daidaitaccen Tsarin Dijital (SDH), kuma ya fi dacewa don aiwatar da farashi. Tare da fa'idodin bandwidth mai faɗin watsawa, ƙarar watsawa mai girma, nesa mai nisa, kuma da wahala daga tsangwama na lantarki, tushen tushen fiber yana ba da damar tashoshin rediyo don watsa siginar sauti zuwa masu watsawa da yawa akan tashoshin daidaitawa ta hanyar hanyar sadarwar SDH data kasance. .

Zaɓin Classic: Magani na tushen Microwave FM SFN

A yankuna daban-daban na duniya, akwai yanayi daban-daban na yanayi da abubuwan zamantakewa (kamar tattalin arziki, yawan jama'a, da dai sauransu) wanda zai iya rage ingancin watsa shirye-shirye, kuma shine ainihin dalilin da ya sa microwave yana da mahimmanci, ta hanyar amfani da injin lantarki, babu buƙatar buƙata. karin igiyoyi, fiber-optics, ko tauraron dan adam. Ana ganin watsawar Microwave a matsayin mafi sauƙi, ƙananan farashi, da mafita mai dacewa, Saboda haka, idan aka kwatanta da mafita guda uku na farko, hanyar sadarwa na SFN na tushen microwave shine mafi sassauƙa, da kuma yin amfani da microwaves don samar da Digital Synchronous Network (SDH). ) an tabbatar da cewa yana taka muhimmiyar rawa a watsa shirye-shiryen yanki mai faɗi.

Menene fa'idodi da rashin amfanin FM Single-Frequency Network (SFN Network)?

Amfanin hanyar sadarwa ta FM SFN (cibiyar sadarwa mai mitar guda ɗaya) sune:

• Ingantaccen ɗaukar hoto: Cibiyoyin sadarwa na SFN suna ba da ingantaccen ɗaukar hoto saboda sigina da ake watsawa daga wurare da yawa, suna ba da sigina mai ƙarfi fiye da hanyar sadarwa ta yau da kullun.
• Adana farashi: Cibiyoyin sadarwar SFN yawanci ba su da tsada don shigarwa da kulawa fiye da sauran nau'ikan cibiyoyin sadarwa.
• Sauƙaƙan kulawa: Cibiyoyin sadarwar SFN sun fi sauƙi don kiyayewa saboda sarrafa cibiyar sadarwa.

disadvantages na hanyar sadarwa ta FM SFN (cibiyar sadarwa mai mitar guda ɗaya) sune:

• Tsangwama: Cibiyoyin sadarwar SFN na iya zama mai sauƙi ga tsangwama daga wasu sigina da tsarin, haifar da rashin ingancin sigina da rage ɗaukar hoto.
• Saitin hadaddun: Cibiyoyin sadarwar SFN suna buƙatar babban matakin ƙwarewa da ƙwarewar fasaha don saitawa da kiyaye su, yana sa su fi wahalar shigarwa da daidaitawa.
• Iyakantaccen kewayon: Cibiyoyin sadarwar SFN suna iyakance a cikin kewayon su saboda dogaro da masu watsawa da yawa.

Menene aikace-aikacen hanyar sadarwa ta FM Single-Frequency Network (SFN Network)?

FM Single-Frequency Network (SFN Network) ginin cibiyar sadarwar watsa shirye-shirye ne wanda ke amfani da mitar guda ɗaya don watsa siginar watsawa da yawa zuwa yanki ɗaya. Wannan nau'in hanyar sadarwa yana da aikace-aikace a cikin watsa shirye-shiryen rediyo da talabijin, sadarwar wayar hannu, sabis na amincin jama'a, da ƙari. SFN Networks suna da aminci sosai, suna samar da ingantaccen sauti da ɗaukar hoto, kuma sun fi tasiri fiye da sauran hanyoyin watsa shirye-shirye. Bugu da ƙari, suna ba da damar ɗaukar hoto mai faɗi tare da ƙarancin masu watsawa, yayin da kuma suna ba da fa'idodi kamar ingantaccen rigakafin kutse da rage yawan wutar lantarki.

Me yasa hanyar sadarwa ta FM Single-Frequency Network (SFN Network) ke da mahimmanci?

FM Single-Frequency Network (SFN Network) yana da mahimmanci saboda yana samar da hanyar da ta dace don rufe manyan wurare tare da sigina guda ɗaya. Hakanan yana haɓaka ingancin watsa shirye-shiryen rediyon FM, yana tabbatar da daidaiton ƙwarewar saurare. Bugu da ƙari, hanyoyin sadarwa na SFN suna taimakawa wajen rage tsangwama tsakanin siginoni masu yawa, wanda ke haifar da ingantaccen sauti da ƙarancin katsewa.

Yadda za a gina mataki-mataki cikakkiyar hanyar sadarwa ta FM Single-Frequency Network (SFN Network) don watsa shirye-shiryen rediyon FM?

1. Yanke shawarar tsarin hanyar sadarwar SFN - wannan ya haɗa da adadin masu watsawa, wuraren su, da sigogin watsawa.
2. Samu lasisin da ake buƙata don masu watsawa kuma saita kowane mai watsawa tare da madaidaitan sigogi.
3. Shigar da masu watsawa a wuraren da suka dace kuma tabbatar da cewa an daidaita eriya da kyau.
4. Haɗa masu watsawa zuwa na tsakiya don ƙirƙirar hanyar sadarwa na masu watsawa.
5. Daidaita masu watsawa don tabbatar da cewa suna watsa sigina iri ɗaya a lokaci guda.
6. Gwada cibiyar sadarwar SFN don tabbatar da cewa tana aiki da kyau.
7. Saka idanu cibiyar sadarwar SFN don tabbatar da cewa tana gudana cikin sauƙi.
8. Yi gyare-gyare ga hanyar sadarwa kamar yadda ya cancanta don haɓaka aikinta.

Wane kayan aiki ne ya ƙunshi cikakkiyar hanyar sadarwa ta FM Single-Frequency Network (SFN Network)?

Cikakken hanyar sadarwa ta FM Single-Frequency Network (SFN Network) ta ƙunshi mai watsawa, masu karɓa, da mai sarrafa hanyar sadarwa. Mai watsawa yana aika sigina akan mitar guda ɗaya, wanda duk masu karɓa ke karɓa. Sa'an nan kuma mai kula da hanyar sadarwa yana daidaita masu karɓa, ta yadda duk su sami sigina iri ɗaya a lokaci guda. Wannan yana tabbatar da cewa ana jin sautin gaba ɗaya, maimakon a jinkirta ko a daina aiki tare. Cibiyar sadarwa ta SFN kuma tana ba da damar mafi kyawun ɗaukar hoto, kamar yadda siginar ke iya kaiwa ga wani yanki mafi girma fiye da tare da mitoci da yawa.

Yadda za a zabi mafi kyawun hanyar sadarwa ta FM Single-Frequency Network (SFN Network)?

Lokacin zabar mafi kyawun hanyar sadarwa ta FM Single-Frequency Network (SFN Network) don watsa shirye-shiryen rediyon FM, yana da mahimmanci a yi la'akari da takamaiman buƙatun mai watsa shirye-shiryen, kamar yankin yanki da za a rufe, ƙarfin siginar da ake so, kasafin kuɗin da ake samu, da bukatun fasaha na hanyar sadarwa. Bugu da ƙari, yana da mahimmanci don bincika ƙwarewar abokan cinikin da suka gabata don tabbatar da cewa hanyar sadarwar SFN da aka zaɓa ta cika tsammanin masu watsa shirye-shirye. A ƙarshe, yana da mahimmanci don tuntuɓar ƙwararrun ƙwararrun ƙwararrun don shawara kan mafi kyawun hanyar sadarwa ta SFN don takamaiman buƙatun mai watsa shirye-shirye.

Yadda za a kula da hanyar sadarwa ta FM Single-Frequency Network (SFN Network) daidai?

A matsayinka na injiniya, ya kamata ka tabbatar da cewa FM Single-Frequency Network (SFN Network) ana kulawa akai-akai kuma ana kiyaye shi bisa ga umarnin masana'anta. Wannan ya haɗa da duba jeri na eriya akai-akai, tabbatar da matakan wutar lantarki, da tabbatar da cewa duk abubuwan haɗin gwiwa suna aiki yadda ya kamata. Bugu da ƙari, ya kamata ku tabbatar da cewa ana sa ido akan hanyar sadarwa akai-akai don yuwuwar kutsawa, da ɗaukar matakai don rage duk wani tsangwama da aka gano. A ƙarshe, ya kamata ku tabbatar da cewa duk wani canje-canjen da aka yi ga hanyar sadarwar SFN an rubuta su kuma an raba su tare da wasu injiniyoyi waɗanda za su iya ɗaukar nauyin kiyaye ta.

Yadda ake gyara hanyar sadarwa ta FM Single-Frequency Network (SFN Network) idan ta kasa aiki?

Idan hanyar sadarwa ta FM SFN ta gaza yin aiki, mataki na farko shine duba duk haɗin yanar gizon don tabbatar da cewa an haɗa dukkan igiyoyin da kyau. Idan haɗin yana da kyau, mataki na gaba shine duba kayan aikin cibiyar sadarwa, kamar eriya, wutar lantarki, da amplifiers, don tabbatar da suna aiki yadda yakamata. Idan kayan aikin kayan masarufi suna aiki da kyau, mataki na gaba shine bincika abubuwan software na cibiyar sadarwar, kamar su coder da modulator, don tabbatar da an daidaita su yadda yakamata. Idan ba a daidaita abubuwan software da kyau ba, yana da mahimmanci a bi umarnin masana'anta don sake saita saitunan. Dangane da matsalar, yana iya zama dole don sabunta firmware ko software zuwa sabon sigar. Da zarar an duba duk haɗin gwiwa da abubuwan haɗin gwiwa kuma suna aiki yadda ya kamata, mataki na ƙarshe shine gwada hanyar sadarwar don tabbatar da tana aiki kamar yadda aka zata.

Yadda za a Zaɓi Tashar Base don hanyar sadarwar SFN?

• La'akari da zirga-zirga: Tabbatar cewa tashoshin tushe da aka zaɓa za su iya rufe manyan manyan hanyoyin da ke kewaye da su yadda ya kamata.
• La'akari da Yawan Jama'a: Yi la'akari da zaɓuɓɓukan da ke ba da damar ɗaukar wuraren da jama'a ke da yawa kamar birane ko garuruwa.
• La'akari da Add-ons: Ƙara ƙarin wuraren ɗaukar hoto a cikin manyan birane tare da dogayen gine-gine kewaye.
• La'akari da Tsawon Antenna: Rike nisa tsakanin tashoshin tushe tsakanin mil 31 idan an saita tsayin eriyar tashar a ƙaramin matsayi; Rike nisa tsakanin tashoshin tushe tsakanin mil 62 idan an saita tsayin eriyar tashar a babban matsayi.

Yadda ake Sanya Cikakkar Sadarwar SFN?

1. Tsara binciken yanar gizo da shirya mafita
2. Zaɓin kayan aiki masu dacewa da yawa
3. Sanya wuri mai haɗin kai na tsakiya (AKA: yanki na ɗaukar hoto) na tashar tushe ta hanyar gwada ƙarfin filin.

Bugu da ƙari, daidaitawar jinkirin lokacin daidaitawa zuwa mafi kyawun yanayin daidaitawa a tsakiyar yankin haɗin gwiwa zai cika buƙatu masu zuwa:

• BABU sautin bugun mitar guda ɗaya a cikin yanki mai daidaituwa (sa idanu lokacin da babu siginar sauti)
• BABU bayyanannen bambance-bambancen daidaitawa da aka samu amo a cikin yanki mai daidaituwa (tsararriyar murya da kiɗa mai daɗi)
• BABU bayyanannen bambance-bambancen bambance-bambancen lokaci a cikin yankin haɗin kai (ƙananan ƙarar bangon baya)
• Ƙimar ƙima na tsarin aiki tare ya kai fiye da maki 4 (ban da wurin da aka shaded)

Menene buƙatun fasaha don hanyar sadarwa ta FM SFN?

Don watsa shirye-shiryen ba tare da wata matsala ba tare da hanyar sadarwa ta SFN, ya kamata a warware matsalolin da ke cikin yankin da ya dace sau ɗaya kuma gaba ɗaya, kuma a nan akwai mahimman abubuwan 4 waɗanda ke buƙatar yin la'akari da su sosai, waɗanda sune:

Garanti isasshiyar Ƙarfin Filin

Ana buƙatar samun isasshen ƙarfin filin ɗaukar hoto a duk wuraren sabis na watsawa a cikin tsarin.

Mitar haɗin gwiwa

A cikin tsarin watsa shirye-shiryen aiki tare na FM, bambancin mitar dangi tsakanin mai ɗaukar kaya da mitar matukin jirgi tsakanin kowane masu watsawa guda biyu da ke kusa bai wuce 1 × 10-9 ba, kwanciyar hankali na ma'anar mita na kowane tashar ≤5 × 10-9 / 24 hours.

A cikin lokaci

A cikin tsarin watsa shirye-shiryen aiki tare na FM, a daidai wurin tunani a cikin yankin haɗin kai, bambancin lokaci tsakanin siginonin da aka daidaita da kowane mai watsawa guda biyu ke watsawa:

• Mono watsa shirye-shirye ≤ 10μS
• sitiriyo watsa shirye-shirye ≤ 5μS.

A cikin tsarin watsa shirye-shiryen aiki tare na FM, lokacin jinkirta kwanciyar hankali na siginar da aka daidaita na kowane mai watsawa:

• Mafi kyau fiye da ± 1μS (1KHZ, matsakaicin matsakaici: ± 75KHZ, 24 hours).

Haɗin kai

• A cikin tsarin watsa shirye-shiryen aiki tare na FM, kuskuren digiri na daidaitawa na kowane masu watsawa biyu na kusa shine ≤3%
• A cikin tsarin watsa shirye-shiryen aiki tare na FM, ana buƙatar kowane mai watsawa don daidaita daidaiton ≤2.5% (1KHZ, matsakaicin mitar mitar: ± 75KHZ, 24 hours).