Trouble Shooting with ELQ 2+ - PowerPoint PPT Presentation

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Trouble Shooting with ELQ 2+

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  1. Trouble Shooting with ELQ 2+ Typical Cable Problems ELEKTR NIKA

  2. Near End Crosstalk (NEXT) Measurement with ELQ 2+ The location of cross talk point can be found by the TDR of ELQ 2+ To visit the TDR page click on the key ELEKTR NIKA

  3. Far End Crosstalk (FEXT) Measurement with ELQ 2+ The location of cross talk point can be found by the TDR of ELQ 2+ To visit the TDR page click on the key ELEKTR NIKA

  4. Crosstalk Point Location with the TDR of ELQ 2+ When the XTALK is out of limit it is very likely that the reason is split.The best tool to locate the XTALK points is ELQ 2+ in TDRXTALK mode. ELQ 2+ Split Resplit Typical Waveform ELEKTR NIKA

  5. Recognition of Bridged Taps Impedance measurementisthe best tool to recognize bridged taps because they cause strongly wavingline impedance Typical impedance measurement result The location of bridged tap can be found by the TDR of ELQ 2+ To visit the TDR page click on the key ELEKTR NIKA

  6. BridgedTap Locationwith the TDR of ELQ 2+ When the line impedance is strongly waving it is very likely that the reason is bridged tap. The best tool to locate it the TDR of ELQ 2+ Typical Waveform ELEKTR NIKA

  7. Micro Interruption Detection Micro interruption is a temporary line interruption due to loose contacts.ELQ 2+ detects the micro interruptions using 2 kHz test tone The location of loose contact can be found by long time TDR measurement To visit the TDR page click on the key ELEKTR NIKA

  8. Loose Contact Location ELQ 2+ in long time TDR mode performs a sequence of repeated measurementsThe obtained waveforms are different if the features of tested pair change during the test Typical Waveform ELEKTR NIKA

  9. Balance (LCL) Measurement ELQ 2+ in Master-Slave mode provides a useful tool to findunbalance causing impairment of xDSL connections. ELEKTR NIKA

  10. Typical Reasons of Unbalance Resistance difference often occurs after replacement of a broken wire. Capacitive unbalance often occurs after replacement of a broken wire ELEKTR NIKA

  11. Resistance Difference Measurement ELQ 2+ provides the following results: Ra, Rb, Rloop, Δ R, % ELEKTR NIKA

  12. Capacitive Unbalance Measurement ELQ 2+ provides the following results:CaE, CbE, ΔC nF, Δ % ELEKTR NIKA

  13. Insulation FaultTypes ELEKTR NIKA

  14. Murray Method The result of Murray measurement is: Lx/L In addition ELQ 2+ provides:   ■ RL loop resistance   ■ FaE insulation resistance   ■ Rx resistance to fault ■ Lx distance to fault The conditions of accurate results:  ■ Ia and Ib < 450 uA ■ Ф wire a=Ф wire b  ■ FbE>1000 x FaE ■ FbE>10 MOhm ELEKTR NIKA

  15. Küpfmüller Method The Küpfmüller method consists of 2 measurements:   ■ First measurement with open far end   ■ Second measurement with strap on the far end  The result of Küpfmüller measurement is: Lx/L In addition ELQ 2+ provides:   ■ RL loop resistance   ■ FaE and FbEinsulation resistances   ■ Rx resistance to fault ■ Lx distance to fault The conditions of accurate results:  ■ Ia and Ib < 450 uA ■ Ф wire a=Ф wire b  ■ 0,5>FaE/FbE>2  ■ FaE+FbE>100 x Rloop ELEKTR NIKA

  16. THANK YOU FOR YOUR ATTENTION!