{"id":21,"date":"2025-10-09T08:49:48","date_gmt":"2025-10-09T08:49:48","guid":{"rendered":"https:\/\/ramex.hu\/?page_id=21"},"modified":"2025-10-25T17:32:42","modified_gmt":"2025-10-25T17:32:42","slug":"munkaink","status":"publish","type":"page","link":"https:\/\/ramex.hu\/index.php\/munkaink\/","title":{"rendered":"Gyenge\u00e1ram"},"content":{"rendered":"\n
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Koaxi\u00e1lis HFC \u00e9s optikai RF overlay telev\u00edzi\u00f3s \u00e9s jeltov\u00e1bb\u00edt\u00f3 h\u00e1l\u00f3zatok ki\u00e9p\u00edt\u00e9se<\/h1>\n\n\n\n
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T\u00f6bb mint 20 \u00e9ves<\/strong> szakmai tapasztalattal rendelkez\u00fcnk a hibrid koaxi\u00e1lis (HFC)<\/strong> \u00e9s optikai RF-overlay (RFoG \/ RF-over-Glass)<\/strong> telev\u00edzi\u00f3s \u00e9s adat\u00e1tviteli h\u00e1l\u00f3zatok tervez\u00e9se, kivitelez\u00e9se \u00e9s \u00fczembe helyez\u00e9se ter\u00fclet\u00e9n. Tev\u00e9kenys\u00e9g\u00fcnk sor\u00e1n orsz\u00e1gos \u00e9s region\u00e1lis szolg\u00e1ltat\u00f3k, \u00f6nkorm\u00e1nyzatok, sz\u00e1llod\u00e1k, ipari parkok, valamint telekommunik\u00e1ci\u00f3s integr\u00e1torok sz\u00e1m\u00e1ra val\u00f3s\u00edtottunk meg komplex jeltov\u00e1bb\u00edt\u00f3 infrastrukt\u00far\u00e1kat<\/strong>.<\/p>\n\n\n\n

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Szakmai \u00e1ttekint\u00e9s<\/h2>\n\n\n\n
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Mit jelent a HFC \u00e9s az optikai RF overlay?<\/h3>\n\n\n\n
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  • HFC (Hybrid Fiber-Coaxial)<\/strong>: a headend-t\u0151l optika sz\u00e1ll\u00edtja az RF\/jelet az node-okig. Onnan koaxon, RF jel jut el az el\u0151fizet\u0151h\u00f6z. DOCSIS a sz\u00e9less\u00e1v\u00fa adatoldal szabv\u00e1nya ezen a fizikai h\u00e1l\u00f3zaton.<\/li>\n<\/ul>\n\n\n\n
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    • Optikai RF overlay \/ RFoG (Radio Frequency over Glass)<\/strong>: az RF jelet optikai \u00faton viszik v\u00e9gig a telep\u00edtett optikai h\u00e1l\u00f3zaton (pl. 1550 nm downstream), az optikai v\u00e9gberendez\u00e9s (mini-node \/ R-ONU) alak\u00edtja vissza RF-re az \u00e9p\u00fcletn\u00e9l vagy lak\u00e1sn\u00e1l; \u00edgy a hagyom\u00e1nyos CATV jel optikai \u00faton terjeszthet\u0151, ak\u00e1r PON mellett is (WDM-mixel\u00e9s a PON-wavelengthekkel).<\/li>\n<\/ul>\n<\/div>\n\n\n\n
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      Mikor \u00e9rdemes RF overlay \/ RFoG-ot v\u00e1lasztani?<\/h3>\n\n\n\n
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      • ha deep fiber<\/strong>-re k\u00edv\u00e1n \u00e1tt\u00e9rni (fiber-to-the-building\/curb\/ node), de szeretn\u00e9 megtartani a megl\u00e9v\u0151 RF-alap\u00fa szolg\u00e1ltat\u00e1sokat (TV QAM csatorn\u00e1k, anal\u00f3g\/digit\u00e1lis multiplexek);<\/li>\n<\/ul>\n\n\n\n
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        • ha PON (GPON\/XGS-PON)<\/strong> mellett szeretn\u00e9 a TV-t \u00e1tk\u00fcldeni ugyanazon optikai sz\u00e1lon (WDM combiner seg\u00edts\u00e9g\u00e9vel 1550 nm RF overlay + 1310\/1490 nm PON).<\/li>\n<\/ul>\n<\/div>\n\n\n\n
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          F\u0151bb komponensek (\u00f6sszefoglal\u00f3 list\u00e1k)<\/h3>\n\n\n\n

          A) Headend eszk\u00f6z\u00f6k<\/em><\/p>\n\n\n\n

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          • RF modul\u00e1torok \/ multiplexerek (QAM multiplex), optikai ad\u00f3k (externally modulated vagy directly modulated 1550 nm TX) az RF overlay-hoz.<\/li>\n\n\n\n
          • CMTS\/CCAP \/ Remote PHY egys\u00e9gek (adat oldali DOCSIS) \u2014 ha internet is szolg\u00e1ltat\u00e1s.<\/li>\n<\/ul>\n\n\n\n

            B) H\u00e1l\u00f3zati \u201ek\u00f6ztes\u201d elemek<\/em><\/p>\n\n\n\n

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            • Optikai ad\u00f3k (1550 nm tipikus video overlay), WDM\/combiner, optikai amplifik\u00e1ci\u00f3 (ha kell), splitterek\/coupler-ek PON eset\u00e9n. <\/li>\n<\/ul>\n\n\n\n

              C) V\u00e9gpont \/ CPE eszk\u00f6z\u00f6k<\/em><\/p>\n\n\n\n

              Optikai mini-node \/ R-ONU (RF fibra-visszaalak\u00edt\u00f3, kimenetk\u00e9nt koax RF), optikai vev\u0151egys\u00e9gek, RF taps\/splitterek belt\u00e9ri eloszt\u00e1shoz.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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              Tipikus hull\u00e1mhosszok \u00e9s multiplex\u00e1l\u00e1si s\u00e9ma<\/h3>\n\n\n\n
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              • Forward \/ downstream (video overlay)<\/strong>: tipikusan 1550 nm<\/strong> (RF modul\u00e1lt, anal\u00f3g\/digit\u00e1lis CATV s\u00e1v 47\u20131002 MHz, vagy sz\u00e9lesebb).<\/li>\n<\/ul>\n\n\n\n
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                • Return \/ upstream<\/strong>: t\u00f6bb megk\u00f6zel\u00edt\u00e9s \u2014 1310 nm, 1590\/1610 nm vagy k\u00fcl\u00f6n upstream band kialak\u00edt\u00e1sa RFoG szabv\u00e1ny szerint (wavelength planning fontos).<\/li>\n<\/ul>\n<\/div>\n\n\n\n
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                  Tervez\u00e9si (link budget) \u00e9s RF-plant szempontok<\/h3>\n\n\n\n
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                  • Optikai teljes\u00edtm\u00e9ny \u00e9s csillap\u00edt\u00e1s<\/strong>: sz\u00e1molja a TX optikai kimen\u0151 teljes\u00edtm\u00e9nyt \u2013 splitter\/coupler beiktat\u00e1si vesztes\u00e9geit \u2013 fiber t\u00e1vols\u00e1g + csatlakoz\u00f3k\/splice vesztes\u00e9gek \u2013 Rx \u00e9rz\u00e9kenys\u00e9g. Az optikai node-oknak meg kell kapniuk a megadott optikai teljes\u00edtm\u00e9nyt a j\u00f3 C\/N \u00e9s MER \u00e9rdek\u00e9ben.<\/li>\n<\/ul>\n\n\n\n
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                    • Koaxi\u00e1lis csillap\u00edt\u00e1s<\/strong>: k\u00fcl\u00f6n\u00f6sen magasabb frekvenci\u00e1kon (pl. 1 GHz+ vagy 1.2\u20133 GHz spektrum), vagy nagyobb t\u00e1vols\u00e1gokon a k\u00e1bel h\u00e1l\u00f3zat csillap\u00edt\u00e1sa er\u0151sen n\u0151.<\/li>\n<\/ul>\n\n\n\n
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                      • Upstream\/Return path \u00e9rz\u00e9kenys\u00e9g<\/strong>: a visszir\u00e1ny\u00fa s\u00e1v hajlamos a zajosod\u00e1sra \u00e9s a k\u00fcls\u0151 zavartat\u00e1sra.<\/li>\n<\/ul>\n<\/div>\n\n\n\n
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                        M\u0171szaki\/\u00fczemeltet\u00e9si javaslatok<\/h3>\n\n\n\n
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                        • WDM integr\u00e1ci\u00f3 PON mellett<\/strong>: haszn\u00e1ljon a megfelel\u0151 WDM combiner\/filters-t, hogy a PON (1310\/1490 nm) \u00e9s RF overlay (1550 nm) egy\u00fcttm\u0171k\u00f6dhessen.<\/li>\n<\/ul>\n\n\n\n
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                          • Szegment\u00e1l\u00e1s<\/strong>: kevesebb el\u0151fizet\u0151\/lt per node jobb SNR \u00e9s upstream kapacit\u00e1s; a node-szegment\u00e1l\u00e1s (fiber deep) cs\u00f6kkenti az er\u0151s\u00edt\u0151k sz\u00e1m\u00e1t.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n
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                            Gyakorlati megval\u00f3s\u00edt\u00e1s<\/h2>\n\n\n\n

                            T\u00f6bb technol\u00f3gi\u00e1n is megval\u00f3s\u00edtottuk megrendel\u0151ink ig\u00e9nyeinek megfelel\u0151 megold\u00e1sainkat <\/p>\n<\/div>\n\n\n\n

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                            HFC h\u00e1l\u00f3zat<\/h3>\n\n\n\n
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                            • F\u0151ir\u00e1ny\u00fa k\u00f6z\u00f6s\u00edt\u00e9sek<\/li>\n\n\n\n
                            • Visszir\u00e1ny\u00fa jelek kezel\u00e9se<\/li>\n\n\n\n
                            • Szegment\u00e1l\u00e1s<\/li>\n\n\n\n
                            • DOCSIS berendez\u00e9sek tervez\u00e9se<\/li>\n<\/ul>\n<\/div>\n\n\n\n
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                              Optikai h\u00e1l\u00f3zat<\/h3>\n\n\n\n
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                              • K\u00f6zponti oldali HFC optikai berendez\u00e9sek telep\u00edt\u00e9se<\/li>\n\n\n\n
                              • Anal\u00f3g \u00e9s Digit\u00e1lis jel transport megold\u00e1sok<\/li>\n\n\n\n
                              • PON m\u00e9r\u00e9stechnik\u00e1k<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n

                                <\/p>\n","protected":false},"excerpt":{"rendered":"

                                Koaxi\u00e1lis HFC \u00e9s optikai RF overlay telev\u00edzi\u00f3s \u00e9s jeltov\u00e1bb\u00edt\u00f3 h\u00e1l\u00f3zatok ki\u00e9p\u00edt\u00e9se T\u00f6bb mint 20 \u00e9ves szakmai tapasztalattal rendelkez\u00fcnk a hibrid koaxi\u00e1lis (HFC) \u00e9s optikai RF-overlay (RFoG \/ RF-over-Glass) telev\u00edzi\u00f3s \u00e9s adat\u00e1tviteli h\u00e1l\u00f3zatok tervez\u00e9se, kivitelez\u00e9se \u00e9s \u00fczembe helyez\u00e9se ter\u00fclet\u00e9n. Tev\u00e9kenys\u00e9g\u00fcnk sor\u00e1n orsz\u00e1gos \u00e9s region\u00e1lis szolg\u00e1ltat\u00f3k, \u00f6nkorm\u00e1nyzatok, sz\u00e1llod\u00e1k, ipari parkok, valamint telekommunik\u00e1ci\u00f3s integr\u00e1torok sz\u00e1m\u00e1ra val\u00f3s\u00edtottunk meg komplex […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-21","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/ramex.hu\/index.php\/wp-json\/wp\/v2\/pages\/21","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ramex.hu\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ramex.hu\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ramex.hu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ramex.hu\/index.php\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":62,"href":"https:\/\/ramex.hu\/index.php\/wp-json\/wp\/v2\/pages\/21\/revisions"}],"predecessor-version":[{"id":245,"href":"https:\/\/ramex.hu\/index.php\/wp-json\/wp\/v2\/pages\/21\/revisions\/245"}],"wp:attachment":[{"href":"https:\/\/ramex.hu\/index.php\/wp-json\/wp\/v2\/media?parent=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}