March 20, 2022
TDR dafay nuru radar. Jumtukaay bi dafay yónnee fiil bi siñaal puls buy yokk bu baax. Su daje ak impedans bu tass, benn wàll ci energie bi dafay feeñaat.
TDR (Reflectometrie Domaine Temps) dafay nuru radar. Jumtukaay bi dafay yónnee fiil bi siñaal puls buy yokk bu baax. Su daje ak impedans buy dakkal (lu melni dagg, kursu bu gàtt, joint, wala point de termination), benn wàll ci energie bi dafay reflect dellu. The instrument measures the time difference between pulse transmission and reflection return, and combined with the signal propagation speed in the medium, calculates the distance to the discontinuity.
Njàngale mii melnani lu yomb, waaye barina mbir yu am solo yu koy indi jafe-jafe ci jëf. Gaawaayu tasaaroo siñaal bi dafay wuute ci xeetu fiil yi (peer twisted dafay tasaaroo ci 0.6 ba 0.7 yoon gaawaayu leer gi). Jamonoy yokkute pulse mooy wane dayo spatial bi - diiru yokkute bu gàtt dafay tekki dayo bu gëna kawe waaye distance bi gëna gàtt biñ mëna natt. The amplitude and polarity of the reflected signal can tell you whether you are dealing with an open circuit (positive reflection), short circuit (negative reflection), or impedance mismatch (partial reflection).
Ci finder fiil yu bees yi, fonctionnalité TDR dañu koy boole ak natt guddaay bi. FangService's PK652 series is a typical TDR-type finder — it not only tells you whether a cable is conductive, but also tells you the total cable length and the specific location of a break.
In practical use, TDR testing requires one end of the cable to be accessible (connected to the instrument), while the state of the other end affects measurement results. Sudee beneen catu fiil bi ubbeeku na (amul àpp), jumtukaay bi dafay gis refleksioŋ bu ubbeeku ci sircuit bi, suko defee mu mëna xayma guddaayu fiil bi yépp. If the other end is terminated with good impedance matching, no reflection is seen, and only the distance to the termination point can be measured. Sudee beneen catu bi dafa gàtt, dañuy gis refleksioŋ bu gàtt, te mën nañu xayma distance bi itam.
TDR amna doole waaye du ludul njuumte. Yenn senaario yuñ faral di juum ci tekki mbir yi ñooy lii. Bi njëkk mooy, sudee fiil bi dafa am ay dagg yu bari, TDR mën na wane bi gëna jege rek - siñaal bi njëkka feeñ dafay maske feeñ yi gëna sori. Ñaareel ba mooy sudee ab dagg mingi jege jumtukaay bi lool (lu melni ci diggante 1 meetar), mën na am zone dead time bi jumtukaay bi mënul ko saafara, moo tax reflection bi duñu ko mëna gis. Ñatteel ba mooy environmaa yi am jafe-jafe electromagnetik yu am doole dañuy indi bruit buy wàññi njubte gi ci nattug TDR.
Rax ci dolli, TDR dafay natt diggante siñaal elektronik bi, du guddaay physique bi. Sudee fiil bi dafa bënn ba noppi dindi ko ci benn conduit, guddaay bi ci nekk dafay ëpp distance liiñ bu jub biñ natt ci TDR. Sooy rapoor ay done test, fàww nga xam ndax lim bi mooy 'guddaayig kuuraŋ' wala 'guddaayig physique'.
Laata TDR, anam wi ñu daan jaar ngir saafara jafe-jafe fiil yi dagg mooy: xool ak xool → wàll-ci-wàll排查 → xool ndax ñu wecci ko. Xeetu liggéey boobu wéy di am njariñ ci distance yu gàtt ak ci lim fiil yu ndaw, waaye ci distance yu gudd, fiil yu bari, ak liggéey yu nëbbu, efficacité bi daa tuuti lool.
Xarala TDR dafay wàññi diiru saafara jafe-jafe ci 'waxtu' dem ci 'simili.' Ingénieur bu xarañ biy jëfandikoo PK652 mën na gis fi fiil bu 100 meetar bi dagg ci ay simili, waaye anam yu yàgg yaa ngi bëgga ubbi boîte junction yu bari ak 排查 wàll par wàll, jël ay waxtu wala sax lu gëna yàgg.
Li gëna am solo, TDR xeetu diagnostic la budul yàq - soxlawul dagg fiil yi wala ubbi konektër yi, moytu ñaareelu yàqu-yàqu ci fiil bi. Loolu lu am solo la, rawatina ci liggéey yiñ defar ba noppi nëbb.
TDR mooy xarala biñ gëna jëfandikoo ngir saytu fiil kuuraŋ, waaye ci saytu fibre optik, ñu ngi koy woowe OTDR (Reflectometry Domaine Temps Optique). OTDR dafay yónnee ay puls optik ci biir fibre bi, ba noppi jàngat leeraay biy feeñ ngir xam fuñu dagg, ñàkka am splice, ñàkka am conector, ak guddaay bi yépp.
Liko dalee ci TDR ba ci OTDR, logique bu mag bi ci xaralay test fiil bi soppikuwul - ñoom ñaar ñu ngi jëfandikoo siñaal yuy seetlu ngir 'gis' li xew ci biir fiil bi. Li soppiku du lenn ludul porte siñaal bi (elektrik vs optik) ak natt bu jaar yoon. Lignée test fiil FangService mingi sëssé fi mu nekk ci test fiil kuuraŋ (PK651/PK652/PK653+/PK659), di joxe pexe test yu mat sëkk ngir jokkoo ak ingenieur ci fiil kuuraŋ. Lu fibre cabling di gëna bari, xeetu produit OTDR yi dina ñu nekk lu am solo ci ligne bi. View the Cable Test Instruments Collection
Waxñu senaario projet bi ak li ngay laaj, dina ñu la jox pexe mi gën, nu jox la devis bi ci diiru 24 waxtu.
Wutal devis bu amul faydaPK651 analog/digital cable finder, PK652 finder with length measurement, PK653+ multi-range finder (100M/300M/400M), PK659 multifunction finder — four series covering the complete needs from basic continuity verification to advanced fault location. High-precision identification, up to 600M length measurement, rapid fault location — designed for installation and maintenance of network, telephone, and electrical cabling systems.
Explore the Cable Test Instruments →