Xawaaraha Sare ee Xadhkaha SAS: Xidhiidhiyayaasha iyo Hagaajinta Calaamadaha
Tilmaamaha Daacadnimada Calaamadaha
Qaar ka mid ah halbeegyada ugu muhiimsan ee daacadnimada calaamadda waxaa ka mid ah gelinta luminta, hadalka-dhamaadka-dhamaadka iyo fogaanta-dhamaadka, luminta soo noqoshada, qalloocsanaanta lammaanaha kala duwan, iyo baaxadda qaabka kala duwanaanta una beddelo habka caadiga ah. In kasta oo ay arrimahani yihiin kuwo isku xidhan oo midba midka kale saamayn ku yeelanayo, haddana waxa aynu midba mid mid u tixgalin karnaa si aynu u darso saamaynteeda aasaasiga ah.
Gelida Khasaare
Gelid lumintu waa yaraynta baaxadda signalka laga bilaabo dhamaadka gudbinta ilaa dhamaadka helitaanka fiilada, waxayna si toos ah u siman tahay inta jeer. Luminta gelinta waxay sidoo kale ku xiran tahay cabbirka siliga, sida ku cad garaafka hoos u dhigista. Qaybaha gudaha ee muddada-gaaban ee isticmaalaya fiilooyinka 30 ama 28-AWG, fiilooyinka tayada sare leh waa inay lahaadaan hoos u dhac ka yar 2 dB/m at 1.5 GHz. Wixii dibadda ah ee 6 Gb/s SAS isticmaalaya fiilooyinka 10m, waxaa lagu talinayaa in la isticmaalo fiilooyinka leh celceliska silig cabbirka 24, kaas oo leh hoos u dhac ah oo kaliya 13 dB at 3 GHz. Haddii aad rabto in aad ku guulaysato calaamado badan oo xawilaad ah oo heerar sare ah oo xog wareejin ah, cadee fiilooyinka leh hoos u dhac yar oo xadhkaha dheereeya, sida SFF-8482 oo leh fiilada AWOODDA ama SlimSAS SFF-8654 8i.
Sheeko is dhaafsi
Crosstalk waxa loola jeedaa xadiga tamarta laga kala qaado hal calaamad ama lamaane kala duwan una gudubta calaamad kale ama lamaane kala duwan. Xadhkaha SAS, haddii iskutallaabtu-dhamaadka-dhamaadka (NEXT) aysan ku filnayn, waxay sababi doontaa inta badan dhibaatooyinka isku xirka. Cabbirka NEXT waxa kaliya oo lagu qabtaa hal cidhif oo fiilada ah, waana cabbirka tamarta laga soo wareejinayo lamaanaha gudbinta wax soo saarka ee lammaanaha wax gelinta. Cabbirka is-dhaafsiga-dhamaadka fog (FEXT) waxaa lagu fuliyaa iyadoo la durayo signalka labada is-gudbinta ee hal daraf ee fiilada lana eego inta tamar ah ee weli ku harsan calaamadda gudbinta ee dhinaca kale ee fiilada. Xiga qaybaha fiilooyinka iyo isku xidhayaasha waxaa badanaa sababa go'doomin liidata ee calaamada kala duwanaanshaha lamaanaha, laga yaabo inay sabab u tahay saldhigyada iyo furayaasha, dhulka oo aan dhamaystirnayn, ama maaraynta khaldan ee aagga joojinta fiilada. Naqshadayaasha nidaamka waxay u baahan yihiin inay hubiyaan in isku-duwayaasha fiilooyinka ay wax ka qabteen saddexdan arrimood, sida qaybaha sida MINI SAS HD SFF-8644 ama OCuLink SFF-8611 4i.
24, 26 iyo 28 waa 100Ω luminta fiilada caadiga ah.
Kulliyadaha fiilooyinka tayada sare leh, kuxiga oo lagu cabbiray si waafaqsan "SFF-8410 - Tilmaamaha Imtixaanka Copper HSS iyo Shuruudaha Hawlgelinta" waa inuu ka hooseeyaa 3%. Dhanka S-parameter-ka, kuxiga waa inuu ka weynaadaa 28 dB.
Soo celi khasaaraha
Khasaaraha soo laabashadu waxa uu cabbiraa baaxadda tamarta ka muuqata nidaamka ama fiilada marka calaamada la duro. Tamarta muuqata waxay keentaa hoos u dhac ku yimaadda balaadhinta calaamadda dhamaadka helitaanka fiilada waxayna u horseedi kartaa arrimaha daacadnimada calaamadaha dhamaadka gudbinta, taas oo iyaduna sababi karta dhibaatooyinka faragelinta korantada ee nidaamka iyo naqshadeeyayaasha nidaamka.
Lumitaankan soo laabashada waxaa sababa is-waafajin la'aanta qaybaha fiilada. Kaliya marka aad si taxadar leh u daaweyso dhibkan ma isbedeli karo xannibaaduhu marka ay calaamaduhu dhex maraan saldhigyada, baloogyada, iyo meelaha fiilada, si loo yareeyo kala duwanaanshaha impedance. Heerka SAS-4 ee hadda jira wuxuu cusbooneysiiyaa qiimaha impedance min ± 10Ω gudaha SAS-2 ilaa ± 3Ω. Xadhkaha tayada sare leh waa in ay ilaaliyaan shuruudda iyada oo loo dulqaadan karo magaca 85 ama 100 ± 3Ω, sida SFF-8639 oo leh SATA 15P ama MCIO 74 Pin Cable.
Qalloocsanaan
Xadhkaha SAS, waxa jira laba nooc oo qallooca qallooca ah: inta u dhaxaysa lammaane kala duwan iyo lammaane kala duwan (aragti daacadnimo - calaamad kala duwan). Aragti ahaan, haddii calaamado badan isku mar la wada galiyo hal daraf ee fiilada, waa inay isla mar gaaraan cirifka kale. Haddii calaamadahani aysan isku mar imaanin, ifafaalahan waxaa loo yaqaannaa qallooca fiilada, ama qalloocinta dib-u-dhaca-skew. Lamaanayaasha kala duwan, qallooca qalloocan ee labada lamaane ee kala duwani waa dib u dhaca u dhexeeya labada kirishbooy ee lamaanaha kala duwan, halka qallooca qalloocan ee u dhexeeya lammaane kala duwani uu yahay daahitaanka u dhexeeya laba qaybood oo kala duwan. Qallooc weyn oo ka dhex jira labada lamaane ee kala duwani waxay xumeyn kartaa isku dheelitirnaanta kala duwanaanta calaamada la kala qaado, waxay yareysaa baaxadda calaamadda, waxay kordhisaa jitter waqtiga, waxayna sababi kartaa dhibaatooyinka faragelinta korantada. Xadhkaha tayada sare leh, qallooca qalloocan ee labada lamaane ee kala duwani waa inuu ka yaraado 10 ps, sida SFF-8654 8i ilaa SFF-8643 ama fiilada Gelida-ka-hortagga khaldan.
Faragelinta korantada
Waxaa jira sababo badan oo ah dhibaatooyinka faragelinta korantada ee fiilooyinka: gaashaanka liidata ama gaashaan la'aanta, habka dhulka oo khaldan, calaamado kala duwanaansho ah oo aan dheellitirneyn, iyo intaa ka sii dheer, is-waafajinta impedance ayaa sidoo kale sabab u ah. Xadhkaha dibadda, gaashaanka iyo dhulka dhigistu waxay u badan tahay inay noqdaan labada arrimood ee ugu muhiimsan ee wax laga qabanayo, sida SFF-8087 oo leh mesh-cas ama fiilada mesh mesh ee Cooper.
Caadiyan, gaashaanka faragelinta dibadda ama korantada waa in ay ahaato laba gaashaan oo bir ah iyo lakab tidcan, oo leh dabool guud ugu yaraan 85%. Isla mar ahaantaana, gaashaankan waa in lagu xiraa jaakada dibadda ee xiriiriyaha, oo leh xiriir 360 ° dhamaystiran. Ilaalinta lammaanaha kala duwan ee shakhsi ahaaneed waa in laga go'doomiyo gaashaandhigga dibadda, iyo khadadka shaandheynta waa in ay joojiyaan calaamadda nidaamka ama dhulka DC si loo hubiyo xakamaynta midaysan ee isku xirka iyo qaybaha fiilada, sida SFF-8654 8i Full Wrap anti-slash ama fiilada isku xiraha Scoop-proof.
Waqtiga boostada: Agoosto-08-2025
