{"id":34586,"date":"2019-10-31T21:59:12","date_gmt":"2019-10-31T18:59:12","guid":{"rendered":"https:\/\/prohoster.info\/blog\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-6-usiliteli-rf-signala\/"},"modified":"2019-10-31T21:59:12","modified_gmt":"2019-10-31T18:59:12","slug":"seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-6-usiliteli-rf-signala","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-6-usiliteli-rf-signala","title":{"rendered":"Rrjetet e kabllit t\u00eb televizionit p\u00ebr t\u00eb vegjlit. Pjesa 6: Amplifikator\u00ebt e sinjalit RF","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Rrjetet e kabllit t\u00eb televizionit p\u00ebr t\u00eb vegjlit. Pjesa 6: Amplifikator\u00ebt e sinjalit RF\" src=\"\/wp-content\/uploads\/2019\/05\/36bcd73dffd731737aa78687864b4475.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nN\u00eb k\u00ebt\u00eb artikull do t\u00eb shqyrtojm\u00eb amplifikator\u00ebt e sinjalit radio t\u00eb frekuenc\u00ebs s\u00eb lart\u00eb t\u00eb televizionit kabllor n\u00eb pjes\u00ebn koaksiale t\u00eb rrug\u00ebs kryesore.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<b class=\"spoiler_title\">P\u00ebrmbajtja e seris\u00eb s\u00eb artikujve<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/449322\/\">Pjesa 1: Arkitektura e p\u00ebrgjithshme e rrjetit KTV<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/449902\/\">Pjesa 2: Struktur\u00eb dhe forma e sinjalit<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450256\/\">Pjesa 3: Komponenti analog i sinjalit<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450258\/\">Pjesa 4: Komponenti digjital i sinjalit<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450278\/\">Pjesa 5: Rrjeti koaksial shp\u00ebrndar\u00ebs<\/a><\/noindex><\/li>\n<li>Pjesa 6: Amplifikator\u00ebt e sinjalit RF<\/li>\n<li>Pjesa 7: Marr\u00ebsit optik\u00eb<\/li>\n<li>Pjesa 8: Rrjeti magistral optik<\/li>\n<li>Pjesa 9: Stacioni kryesor<\/li>\n<li>Pjesa 10: Gjetja dhe ndreqja e defekteve n\u00eb rrjetin KTV<\/li>\n<\/ul>\n<p>\nN\u00ebse n\u00eb sht\u00ebpi (apo madje n\u00eb t\u00ebr\u00eblagjen) ka vet\u00ebm nj\u00eb marr\u00ebs optik dhe gjith\u00eb ndarja deri te stendat \u00ebsht\u00eb realizuar me kabllo koaksiale, \u00ebsht\u00eb e domosdoshme t\u00eb rritet sinjali n\u00eb fillimin e tij. N\u00eb rrjetin ton\u00eb p\u00ebrdoren kryesisht pajisje nga kompania Teleste, k\u00ebshtu q\u00eb do t\u00eb flas n\u00eb lidhje me to, por thelb\u00ebsisht pajisjet e prodhuesve t\u00eb tjer\u00eb nuk duken ndryshe dhe grupi i funksioneve p\u00ebr konfigurim zakonisht \u00ebsht\u00eb i ngjash\u00ebm.<\/p>\n<p>Modeli CXE180M ka numrin minimal t\u00eb konfigurimeve:<br \/>\n<img decoding=\"async\" alt=\"Rrjetet e kabllit t\u00eb televizionit p\u00ebr t\u00eb vegjlit. Pjesa 6: Amplifikator\u00ebt e sinjalit RF\" src=\"\/wp-content\/uploads\/2019\/05\/7bb8b53563084681625326a0bff20e70.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSi\u00e7 e mbani mend ndoshta nga pjes\u00ebt e m\u00ebparshme, sinjali ka dy parametra t\u00eb r\u00ebnd\u00ebsish\u00ebm sasi: ky \u00ebsht\u00eb niveli dhe ndjeshm\u00ebria. Pik\u00ebrisht ata mund t\u00eb ndihmojn\u00eb n\u00eb rregullimin e parametrave t\u00eb amplifikatorit. Le t\u00eb fillojm\u00eb sipas rendit: menj\u00ebher\u00eb pas lidhjes hyr\u00ebse ndodhet <b>attenuator<\/b>. Ai lejon t\u00eb zvog\u00eblohet sinjali hyr\u00ebs n\u00eb nj\u00eb vler\u00eb deri n\u00eb 31 dB (n\u00ebse kalojm\u00eb n\u00eb jumperin blu sipas skem\u00ebs, diapazoni i rrot\u00ebs ndryshon nga 0-15 n\u00eb 16-31 dB). Kjo b\u00ebhet e nevojshme n\u00ebse n\u00eb amplifikator arrin nj\u00eb sinjal m\u00eb shum\u00eb se 70 dB\u03bcV. Problemi \u00ebsht\u00eb se shkalla amplifikuese ofron rritjen e nivelit t\u00eb sinjalit p\u00ebr 40 dB, dhe n\u00eb dalje duhet t\u00eb merret jo m\u00eb shum\u00eb se 110 dB\u03bcV (n\u00eb nivele m\u00eb t\u00eb larta, raporti sinjal\/zhurm\u00eb bie ndjesh\u00ebm dhe ky num\u00ebr \u00ebsht\u00eb i r\u00ebnd\u00ebsish\u00ebm p\u00ebr t\u00eb gjith\u00eb amplifikator\u00ebt dhe marr\u00ebsit broadband me amplifikator t\u00eb integruar). K\u00ebshtu, n\u00ebse n\u00eb hyrjen e amplifikatorit arrin 80 dB\u03bcV, p\u00ebr shembull, at\u00ebher\u00eb n\u00eb dalje do t\u00eb na jepet 120 dB\u03bcV zhurm\u00eb dhe shkat\u00ebrrim t\u00eb numrave. P\u00ebr t\u00eb shmangur k\u00ebt\u00eb, duhet t\u00eb vendosim attenuatorin hyr\u00ebs n\u00eb pozicionin e reduktimit prej 10 dB.<\/p>\n<p>Pas attenuatorit shohim <b>ekvalizuesin<\/b>. Ai \u00ebsht\u00eb i nevojsh\u00ebm p\u00ebr t\u00eb eliminuar r\u00ebnien e kund\u00ebrt, n\u00ebse ajo ekziston. Kjo arrihet duke zvog\u00ebluar nivelin e sinjalit n\u00eb zon\u00ebn e frekuencave t\u00eb ul\u00ebta p\u00ebr nj\u00eb vler\u00eb deri n\u00eb 20 dB. Duhet t'i kushtojm\u00eb v\u00ebmendje faktit q\u00eb nuk mund t\u00eb eliminojm\u00eb r\u00ebnien e kund\u00ebrt duke rritur nivelin e frekuencave m\u00eb t\u00eb larta, vet\u00ebm duke penguar ato t\u00eb ul\u00ebta.<\/p>\n<p>K\u00ebto dy mjete shpesh jan\u00eb t\u00eb mjaftueshme p\u00ebr t\u00eb korrigjuar devijimet e zakonshme t\u00eb sinjalit. N\u00ebse kjo nuk \u00ebsht\u00eb e mjaftueshme, at\u00ebher\u00eb mund t\u00eb p\u00ebrdorim k\u00ebto:<\/p>\n<p><b>Simuluesin e kabllit<\/b>, i realizuar si nj\u00eb shtes\u00eb, e cila mund t\u00eb vendoset horizontalisht ose verticalisht, si\u00e7 tregon emri, simuluan lidhjen e nj\u00eb segmenti t\u00eb gjat\u00eb kablli, n\u00eb t\u00eb cilin duhet t\u00eb ndodhi zbehja e frekuencave t\u00eb larta. Kjo lejon t\u00eb zvog\u00eblohet n\u00ebse \u00ebsht\u00eb e nevojshme r\u00ebnia e drejtp\u00ebrdrejt\u00eb, duke penguar 8 dB n\u00eb zon\u00ebn e frekuencave t\u00eb larta. Kjo mund t\u00eb jet\u00eb e dobishme kur instalohet amplifikator\u00ebt nj\u00eb pas nj\u00eb n\u00eb distanca t\u00eb shkurtra, p\u00ebr shembull.<\/p>\n<p>Pas k\u00ebtyre manipulimeve, sinjali kalon n\u00eb shkall\u00ebn e par\u00eb t\u00eb amplifikatorit, pas s\u00eb cil\u00ebs shohim nj\u00eb tjet\u00ebr shtes\u00eb q\u00eb lejon t\u00eb zvog\u00eblohet m\u00eb tej koeficienti i amplifikimit. Ndihmuesi q\u00eb pason do t\u00eb na ndihmoj\u00eb p\u00ebrs\u00ebri t\u00eb pengojm\u00eb frekuencat m\u00eb t\u00eb ulta p\u00ebr t\u00eb arritur ndjeshm\u00ebrin\u00eb e nevojshme. K\u00ebto dy konfigurime jan\u00eb n\u00eb thelb analoge n\u00eb attenuatorin dhe ekvalizuesin hyr\u00ebs, por q\u00eb veprojn\u00eb me shkall\u00ebn e dyt\u00eb t\u00eb amplifikatorit.<\/p>\n<p>N\u00eb daljen e amplifikatorit ne shohim <b>ndarje testuese<\/b>. Ky \u00ebsht\u00eb nj\u00eb lidh\u00ebs standard me file, i cili mund t\u00eb p\u00ebrdoret p\u00ebr t\u00eb lidhur nj\u00eb instrument mat\u00ebs ose nj\u00eb marr\u00ebs televiziv p\u00ebr t\u00eb kontrolluar cil\u00ebsin\u00eb e sinjalit n\u00eb dalje. Nuk t\u00eb gjitha instrumentet dhe pothuajse asnj\u00eb televizioni nuk jan\u00eb t\u00eb aft\u00eb t\u00eb p\u00ebrpunojn\u00eb normalisht nj\u00eb sinjal me nivel 100 dB\u03bcV dhe m\u00eb shum\u00eb, prandaj ndarjet testuese n\u00eb \u00e7do pajisje gjithmon\u00eb b\u00ebhen me zbehje 20-30 dB nga vlera reale n\u00eb dalje. Kjo duhet gjithmon\u00eb t\u00eb mbahet mend gjat\u00eb matjeve.<\/p>\n<p>Para daljes \u00ebsht\u00eb instaluar nj\u00eb tjet\u00ebr shtes\u00eb. N\u00eb foton e amplifikatorit duket se shk\u00ebmbimi i treguesit tregon vet\u00ebm p\u00ebr daljen e djatht\u00eb. Dhe kjo do t\u00eb thot\u00eb se n\u00eb t\u00eb majt\u00eb nuk do t\u00eb ket\u00eb sinjal. K\u00ebto shtesa jan\u00eb t\u00eb vendosura n\u00eb k\u00ebta amplifikator\u00eb 'nga kutia', dhe brenda vet\u00eb kutis\u00eb s\u00eb dor\u00ebzimit ka nj\u00eb tjet\u00ebr:<\/p>\n<p><img decoding=\"async\" alt=\"Rrjetet e kabllit t\u00eb televizionit p\u00ebr t\u00eb vegjlit. Pjesa 6: Amplifikator\u00ebt e sinjalit RF\" src=\"\/wp-content\/uploads\/2019\/05\/4981c7492e6304d7d1bbbdbc1cdc0720.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nAjo lejon t\u00eb aktivizohet dalja e dyt\u00eb, por patjet\u00ebr sjell nj\u00eb zbehje sinjali prej 4 dB.<\/p>\n<p>Amplifikatori i modelit CXE180RF n\u00eb shikim t\u00eb par\u00eb ka dyfish m\u00eb shum\u00eb konfigurime:<br \/>\n<img decoding=\"async\" alt=\"Rrjetet e kabllit t\u00eb televizionit p\u00ebr t\u00eb vegjlit. Pjesa 6: Amplifikator\u00ebt e sinjalit RF\" src=\"\/wp-content\/uploads\/2019\/05\/31464579dfc395537a4f38fde05b7efd.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nN\u00eb t\u00eb v\u00ebrtet\u00eb, \u00e7do gj\u00eb nuk \u00ebsht\u00eb aq e tmerrshme: p\u00ebrve\u00e7 disa ndryshimeve t\u00eb vogla, k\u00ebtu \u00ebsht\u00eb e nj\u00ebjta si n\u00eb at\u00eb q\u00eb u shqyrtua m\u00eb sip\u00ebr.<\/p>\n<p>S\u00eb pari, n\u00eb hyrje \u00ebsht\u00eb vendosur nj\u00eb ndarje testuese. Ai \u00ebsht\u00eb i nevojsh\u00ebm p\u00ebr kontrollin e sinjalit pa e \u00e7aktivizuar kabllon nga hyrja e amplifikatorit dhe, p\u00ebr pasoj\u00eb, pa nd\u00ebrprerjen e transmetimit.<\/p>\n<p>S\u00eb dyti, filtrat diplex q\u00eb jan\u00eb shfaqur, si dhe attenuator dhe ekvalizatori i daljes jan\u00eb t\u00eb nevojshme p\u00ebr konfigurimin e kanaleve t\u00eb kalimit DOCSIS, k\u00ebshtu q\u00eb n\u00eb kuad\u00ebr t\u00eb k\u00ebtij artikulli do t\u00eb them vet\u00ebm se filtrat presin frekuencat q\u00eb jan\u00eb t\u00eb sh\u00ebnuara n\u00eb to dhe kjo mund t\u00eb b\u00ebhet nj\u00eb problem, n\u00ebse n\u00eb spektrin e sinjalit n\u00eb k\u00ebto frekuenca transmetohen kanale televizive. Fatmir\u00ebsisht, prodhuesi i ofron ato me vlera t\u00eb ndryshme dhe z\u00ebvend\u00ebsimi i tyre, n\u00eb rast nevoje, nuk paraqet v\u00ebshtir\u00ebsi.<br \/>\n<img decoding=\"async\" alt=\"Rrjetet e kabllit t\u00eb televizionit p\u00ebr t\u00eb vegjlit. Pjesa 6: Amplifikator\u00ebt e sinjalit RF\" src=\"\/wp-content\/uploads\/2019\/05\/0a1001ad14d9c4ddb09fe80b8cb2548f.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDhe k\u00ebto rrotulla (ashtu si jumperi q\u00eb shkakton humbje prej 10dB) ndikojn\u00eb ekskluzivisht n\u00eb kanalin e kthimit dhe nuk mund t\u00eb ndryshojn\u00eb sinjalin televiziv.<\/p>\n<p>Tre jumperat e mbetur na ofrojn\u00eb mund\u00ebsin\u00eb p\u00ebr t'u njohur me nj\u00eb teknologji t\u00eb till\u00eb si <b>fuqizimi n\u00eb distanc\u00eb<\/b>.<\/p>\n<p>Kur projektohen sht\u00ebpi, shpesh forcuesit vendosen n\u00eb vende ku mund t\u00eb ket\u00eb probleme me furnizimin me energji elektrike nga tabela ndar\u00ebse. P\u00ebr m\u00eb tep\u00ebr, \u00e7do \u00e7ift \"stek-rrjet\u00eb\", q\u00eb n\u00ebnkupton gjithashtu nj\u00eb ndez\u00ebs automatik (i cili mund t\u00eb vendoset n\u00eb vendin m\u00eb t\u00eb papritur), p\u00ebrb\u00ebn nj\u00eb pik\u00eb potenciale d\u00ebshtimi. N\u00eb k\u00ebt\u00eb kuad\u00ebr, ekziston mund\u00ebsia p\u00ebr t\u00eb furnizuar pajisjet p\u00ebrmes kabllit koaksial. Dhe, si\u00e7 tregohet nga etiketimi n\u00eb pjes\u00ebn e lart\u00eb t\u00eb furnizuesit, kjo mund t\u00eb jet\u00eb si rrym\u00eb alternative ashtu edhe rrym\u00eb t\u00eb drejt\u00eb me nj\u00eb gam\u00eb t\u00eb gjer\u00eb tensionesh. Pra, k\u00ebta tre jumpera p\u00ebrfshijn\u00eb mund\u00ebsin\u00eb e kalimit t\u00eb rrym\u00ebs s\u00eb furnizimit n\u00eb hyrje, si dhe n\u00eb secil\u00ebn nga dy daljet ve\u00e7mas, n\u00ebse na nevojitet t\u00eb furnizojm\u00eb forcuesin tjet\u00ebr n\u00eb kaskad\u00eb. Kur aktivizohet litarin me abonent\u00eb, tensionin n\u00eb dalje natyrisht q\u00eb nuk mund ta jepni!<\/p>\n<p>Un\u00eb tashm\u00eb kam p\u00ebrmendur n\u00eb <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450278\/\">t\u00eb kaluar\u00ebn<\/a><\/noindex> pjes\u00ebn se n\u00eb nj\u00eb sistem t\u00eb till\u00eb p\u00ebrdoren ndar\u00ebs special\u00eb magistral\u00eb:<\/p>\n<p><img decoding=\"async\" alt=\"Rrjetet e kabllit t\u00eb televizionit p\u00ebr t\u00eb vegjlit. Pjesa 6: Amplifikator\u00ebt e sinjalit RF\" src=\"\/wp-content\/uploads\/2019\/05\/55ec9e0e4779d8e9f7a0e055e469ffda.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<img decoding=\"async\" alt=\"Rrjetet e kabllit t\u00eb televizionit p\u00ebr t\u00eb vegjlit. Pjesa 6: Amplifikator\u00ebt e sinjalit RF\" src=\"\/wp-content\/uploads\/2019\/05\/ff4ea47c231ed19a57b6033992cb4029.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nN\u00eb to p\u00ebrdoren element\u00eb m\u00eb t\u00eb m\u00ebdhenj dhe m\u00eb t\u00eb besuesh\u00ebm, dhe trupi masiv siguron disiplinimin e nxeht\u00ebsis\u00eb dhe mbrojtjen.<\/p>\n<p>Burimi i energjis\u00eb n\u00eb k\u00ebt\u00eb rast \u00ebsht\u00eb nj\u00eb bllok me transformator t\u00eb madh t\u00eb integruar:<br \/>\n<img decoding=\"async\" alt=\"Rrjetet e kabllit t\u00eb televizionit p\u00ebr t\u00eb vegjlit. Pjesa 6: Amplifikator\u00ebt e sinjalit RF\" src=\"\/wp-content\/uploads\/2019\/05\/7df95edc73042c88fc3b7efbeb11159a.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDuhet th\u00ebn\u00eb se, megjith\u00eb dukshm\u00ebrin\u00eb optimale t\u00eb sistemit t\u00eb furnizimit n\u00eb distanc\u00eb, forcuesit q\u00eb punojn\u00eb n\u00eb m\u00ebnyr\u00eb t\u00eb till\u00eb p\u00ebrballen m\u00eb rrall\u00eb me pasoja nga aksidentet e furnizimit me energji elektrike n\u00eb sht\u00ebpi, dhe gjat\u00eb z\u00ebvend\u00ebsimit t\u00eb tyre, personeli teknik duhet t\u00eb k\u00ebrkoj\u00eb dhe t\u00eb \u00e7aktivizoj\u00eb furnizimin e bllokut, p\u00ebr t\u00eb mos punuar me kabllot n\u00ebn tension, k\u00ebshtu q\u00eb gjat\u00eb z\u00ebvend\u00ebsimit t\u00eb nj\u00eb forcuesi pa sinjal, i gjith\u00eb sht\u00ebpia mbetet pa sinjal. P\u00ebr t\u00eb nj\u00ebjt\u00ebn arsye, n\u00eb forcuesit e till\u00eb nevojitet nj\u00eb shfryrje testi n\u00eb hyrje: p\u00ebrndryshe do t\u00eb ishte e nevojshme t\u00eb punosh me kabllon n\u00ebn rrym\u00eb.<\/p>\n<p>Do t\u00eb ishte interesante t\u00eb dija nga koleg\u00ebt sa t\u00eb zakonshme jan\u00eb sistemet me furnizim n\u00eb distanc\u00eb, ju lutem shkruani n\u00eb komentet n\u00ebse i p\u00ebrdorni.<\/p>\n<p>N\u00ebse \u00ebsht\u00eb e nevojshme t\u00eb lidhni nj\u00eb num\u00ebr t\u00eb madh televizor\u00ebsh brenda nj\u00eb apartamenti ose zyre, mund t\u00eb hasni n\u00eb munges\u00ebn e nivelit pas zinxhirit t\u00eb ndar\u00ebsve. N\u00eb k\u00ebt\u00eb rast, duhet t\u00eb instaloni nj\u00eb forcues n\u00eb territorin e abonentit, p\u00ebr t\u00eb cilin p\u00ebrdoren pajisje t\u00eb vogla me sa m\u00eb pak konfigurime dhe me nj\u00eb nivel m\u00eb t\u00eb ul\u00ebt forcimi. <br \/>\nP\u00ebr shembull, nj\u00eb i till\u00eb:<br \/>\n<img decoding=\"async\" alt=\"Rrjetet e kabllit t\u00eb televizionit p\u00ebr t\u00eb vegjlit. Pjesa 6: Amplifikator\u00ebt e sinjalit RF\" src=\"\/wp-content\/uploads\/2019\/05\/a0cca80a889e1a54602fefdceaf09126.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450452\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u044d\u0442\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u0443\u0441\u0438\u043b\u0438\u0442\u0435\u043b\u0438 \u0432\u044b\u0441\u043e\u043a\u043e\u0447\u0430\u0441\u0442\u043e\u0442\u043d\u043e\u0433\u043e \u0440\u0430\u0434\u0438\u043e\u0441\u0438\u0433\u043d\u0430\u043b\u0430 \u043a\u0430\u0431\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0442\u0435\u043b\u0435\u0432\u0438\u0434\u0435\u043d\u0438\u044f \u043d\u0430 \u043a\u043e\u0430\u043a\u0441\u0438\u0430\u043b\u044c\u043d\u043e\u0439 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