{"id":5881,"date":"2023-05-22T16:06:03","date_gmt":"2023-05-22T16:06:03","guid":{"rendered":"https:\/\/www.vyrobcikabelu.cz\/?p=5881"},"modified":"2023-05-22T16:06:54","modified_gmt":"2023-05-22T16:06:54","slug":"symetricke-datove-kable-a-ich-parametre-1","status":"publish","type":"post","link":"https:\/\/www.vyrobcikabelu.cz\/sk\/symetricke-datove-kable-a-ich-parametre-1\/","title":{"rendered":"Symetrick\u00e9 d\u00e1tov\u00e9 k\u00e1ble a\u00a0ich parametre 1"},"content":{"rendered":"

Nasleduj\u00faci text prierezovo pojedn\u00e1va o\u00a0z\u00e1kladn\u00fdch typoch be\u017ene pou\u017e\u00edvan\u00fdch symetrick\u00fdch d\u00e1tov\u00fdch<\/strong> k\u00e1bloch. V\u00a0prvej \u010dasti s\u00fa pop\u00edsan\u00e9 z\u00e1kladn\u00e9 kon\u0161trukcie ako aj terminol\u00f3gia, ktor\u00e1 s\u00a0touto tematikou s\u00favis\u00ed. N\u00e1sledne sa \u010dl\u00e1nok venuje parametrom, ktor\u00e9 s\u00favisia s\u00a0kvalitat\u00edvnymi po\u017eiadavkami na d\u00e1tov\u00e9 k\u00e1ble.<\/strong><\/p>\n

\u010co s\u00fa to symetrick\u00e9 d\u00e1tov\u00e9 k\u00e1ble?<\/strong><\/h2>\n

Symetrick\u00e9 d\u00e1tov\u00e9 k\u00e1ble, tie\u017e be\u017ene zn\u00e1me ako \u201einternetov\u00e9 k\u00e1ble\u201c, sa rozde\u013euj\u00fa do kateg\u00f3ri\u00ed pod\u013ea frekven\u010dn\u00e9ho rozsahu, v\u00a0ktorom s\u00fa vyhodnocovan\u00e9 jeho n\u00edzkofrekven\u010dn\u00e9 a\u00a0vysokofrekven\u010dn\u00e9 parametre.<\/p>\n

Dnes s\u00fa najzn\u00e1mej\u0161ie nasledovn\u00e9 kateg\u00f3rie:<\/h3>\n

Tab 1. Kateg\u00f3rie symetrick\u00fdch d\u00e1tov\u00fdch k\u00e1blov pod\u013ea IEC61156<\/p>\n\n\n\n\n\n\n\n\n
\n

Kateg\u00f3ria<\/strong><\/p>\n<\/td>\n

\n

Pracovn\u00e1 frekvencia (MHz)<\/strong><\/p>\n<\/td>\n

\n

Prenosov\u00e1 r\u00fdchlos\u0165 (Gbps)<\/strong><\/p>\n<\/td>\n<\/tr>\n

\n

Cat 5e<\/p>\n<\/td>\n

\n

100<\/p>\n<\/td>\n

\n

1<\/p>\n<\/td>\n<\/tr>\n

\n

Cat 6<\/p>\n<\/td>\n

\n

250<\/p>\n<\/td>\n

\n

10<\/p>\n<\/td>\n<\/tr>\n

\n

Cat 6A<\/p>\n<\/td>\n

\n

500<\/p>\n<\/td>\n

\n

10<\/p>\n<\/td>\n<\/tr>\n

\n

Cat 7<\/p>\n<\/td>\n

\n

600<\/p>\n<\/td>\n

\n

10<\/p>\n<\/td>\n<\/tr>\n

\n

Cat 7A<\/p>\n<\/td>\n

\n

1000<\/p>\n<\/td>\n

\n

10 (25)<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Tieto k\u00e1ble sa vyzna\u010duj\u00fa svojou kon\u0161trukciou, ktor\u00e1 pozost\u00e1va zo \u0161tyroch skr\u00faten\u00fdch dr\u00f4tov \u2013 \u017e\u00edl. Existuj\u00fa aj kon\u0161trukcie, kde sa namiesto p\u00e1rov pou\u017e\u00edvaj\u00fa quady, ale najbe\u017enej\u0161ie pou\u017e\u00edvan\u00fdmi s\u00fa k\u00e1ble s\u00a0kon\u0161trukciou obsahuj\u00facou p\u00e1ry. \u00a0Pod\u013ea kateg\u00f3rie, teda pou\u017eite\u013en\u00e9ho frekven\u010dn\u00e9ho p\u00e1sma, sa \u017eily, ako aj cel\u00fd k\u00e1bel tienia. Tienenie p\u00e1rov \u017e\u00edl sa spravidla zabezpe\u010duje f\u00f3liami. Pre tienenie k\u00e1bla sa pou\u017e\u00edvaj\u00fa f\u00f3lie alebo f\u00f3lie a oplet.<\/p>\n

\"\"
Obr. 1 Typick\u00e1 kon\u0161trukcia d\u00e1tov\u00e9ho k\u00e1bla S\/FTP<\/figcaption><\/figure>\n

\u017dily sto\u010den\u00fdch p\u00e1rov sa vyr\u00e1baj\u00fa s priemermi v rozmedz\u00ed 0,4 \u2013 0,65mm (AWG 26 – 22). Priemer \u017e\u00edl je z\u00e1visl\u00fd na pou\u017eitej kateg\u00f3rii k\u00e1blov, a\u00a0teda na rozsahu pracovn\u00fdch frekvenci\u00ed.<\/p>\n

Pre r\u00fdchlu identifik\u00e1ciu kon\u0161trukcie d\u00e1tov\u00fdch k\u00e1blov so st\u00e1\u010dan\u00fdmi p\u00e1rmi (twisted pairs – TP) sa definovalo n\u00e1zvoslovie \u2013 k\u00f3d, ktor\u00fdm je mo\u017en\u00e9 ur\u010di\u0165 sp\u00f4sob tienenia p\u00e1rov a\u00a0k\u00e1bla.<\/p>\n

xx<\/strong>\/yTP a typy kon\u0161trukci\u00ed symetrick\u00fdch d\u00e1tov\u00fdch k\u00e1blov<\/strong><\/h2>\n