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Trouble Shooting with ELQ 2+. Typical Cable Problems. ELEKTR NIKA. Near End Crosstalk ( N EXT) 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.
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Trouble Shooting with ELQ 2+ Typical Cable Problems ELEKTR NIKA
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
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
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
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
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
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
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
Balance (LCL) Measurement ELQ 2+ in Master-Slave mode provides a useful tool to findunbalance causing impairment of xDSL connections. ELEKTR NIKA
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
Resistance Difference Measurement ELQ 2+ provides the following results: Ra, Rb, Rloop, Δ R, % ELEKTR NIKA
Capacitive Unbalance Measurement ELQ 2+ provides the following results:CaE, CbE, ΔC nF, Δ % ELEKTR NIKA
Insulation FaultTypes ELEKTR NIKA
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
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