Chapter
13 Copper Testing
OneExpert DSL User's Guide
22052280, Rev. 015
April 2019
194
Running a CrossTalk TDR test
The CrossTalk TDR feature is available only on ONX-580P and is used to check interference
between two pairs of wires. This test helps to check if there is any crosstalk between the two
lines as a result of corrosion or other problems.
Transmission line problems occur when one of the conductors (Tip/A or Ring/B) is split. The
split causes the line to have poor balance and makes
the line susceptible to noise. Crosstalk TDR is the best
mechanism for finding split lines. In the following
illustration, the R and R1 lines are crossed at points y and z.
The crosstalk test transmits a signal on one pair of wires,
and measures the received signal on the second pair. This
test quickly locates splits along a circuit.
1. Connect the Yellow and Blue leads to the line where you want to send the pulse.
Connect the Red and Black leads to the line under test.
2. Select the
TDR
button on the home screen.
3. Use the
Mode
button to select the
Crosstalk TDR
.
4. Press the
Start
button if the test isn’t already running.
The test will give you the distance measurement where there is a connection between
the two lines.
5. To stop, press
Stop
.
Summary of Contents for OneExpert DSL ONX-580
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Page 6: ...OneExpert DSL User s Guide 22052280 Rev 015 April 2019 vi ...
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Page 224: ...Chapter 13 Copper Testing OneExpert DSL User s Guide 22052280 Rev 015 April 2019 224 ...
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