1. Trouble Shooting with ELQ 30
Typical Cable Problems
CROSSTALK
BRIDGED TAPS
INTERRUPTION
UNBALANCE
NEXT Measurement
FEXT Measurement
Location of XTALK Point
Recognition of Bridged Taps
Location of Bridged Taps
Micro Interruption Detection
Location of Loose Contacts
LCL Balance Measurement
To learn more click on the selected topic!
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2. Near End Crosstalk Measurement with ELQ 30
MASTER
SLAVE
ELQ 30
MASTER
SLAVE
FAIL ► ◄
PASS
The location of cross talk point can be found by the TDR of ELQ 30
To visit the TDR page click on the key
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3. Far End Crosstalk Measurement with ELQ 30
MASTER
SLAVE
ELQ 30
MASTER
SLAVE
FAIL ► ◄
PASS
The location of cross talk point can be found by the TDR of ELQ 30
To visit the TDR page click on the key
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4. Crosstalk Point Location with the TDR of ELQ 30
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 30 in TDRXTALK mode.
ELQ Split Resplit
Typical Waveform
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5. Recognition of Bridged Taps
Impedance measurement is the best tool to recognize bridged taps because they cause strongly waving line impedance
Typical impedance measurement result
FAIL ► ◄
IRREGULAR
The location of bridged tap can be found by the TDR of ELQ30
To visit the TDR page click on the key
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6. Bridged Tap Location with the TDR of ELQ 30
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 30
Typical Waveform
Distance to tap
Length of tap
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7. Micro Interruption Detection
Micro interruption is a temporary line interruption due to loose contacts. ELQ 30 detects the micro interruptions using 25 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
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8. Loose Contact Location
ELQ 30 in long time TDR mode performs a sequence of repeated measurements The obtained waveforms are different if the features of tested pair change during the test
Typical Waveform
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9. Balance (LCL ) Measurement
ELQ 30 in Master-Slave mode provides a useful tool to find unbalance causing impairment of xDSL connections.
ELQ 30
MASTER
SLAVE
ELQ 30
MASTER
SLAVE
PASS ► ◄
FAIL
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10. THANK YOU FOR YOUR ATTENTION!