1. Trouble Shooting with ELQ 30A+
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
ELQ 30A+
MASTER
SLAVE
ELQ 30A+
MASTER
SLAVE
FAIL ► ◄
PASS
The location of cross talk point can be found by the TDR of ELQ 30A+
To visit the TDR page click on the key
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3. Far End Crosstalk Measurement
ELQ 30A+
MASTER
SLAVE
ELQ 30A+
MASTER
SLAVE
FAIL ► ◄
PASS
The location of cross talk point can be found by the TDR of ELQ 30A+
To visit the TDR page click on the key
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4. Crosstalk Point Location with TDR
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 30A+ in TDRXTALK mode.
ELQ 30A 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 ELQ 30A+
To visit the TDR page click on the key
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6. Bridged Tap Location with TDR
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 30A+
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 30A+ detects the micro interruptions using 1020 Hz 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 30A+ 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 30A+ in Master-Slave mode provides a useful tool to find unbalance causing impairment of xDSL connections.
ELQ 30A+
MASTER
SLAVE
ELQ 30A+
MASTER
SLAVE
PASS ► ◄
FAIL
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10. THANK YOU FOR YOUR ATTENTION!