Near-End Crosstalk (Next) - Intec ARGUS 300 Manual

3 Copper tests

3.1.11 Near-end crosstalk (NEXT)

The ARGUS generates a 1 MHz tone on line pair 1 and measures the crosstalk on the
adjacent line pair 2, which can cause severe performance issues for DSL. A customer's line
can pass through multiple segments. In this case, the measurement must be performed
segment by segment, and different line pairs may need to be used as the measuring lines.
A voltage check is performed before the measurement in which the
voltage limits given in the table (see page 7) may not be exceeded.
The length of the measuring leads can significantly affect the
measurement, so you should always perform your measurements using
the original accessories.
The measuring ranges, resolutions and accuracies of NEXT measurement are set out in
the chapter Technical data, see page 10.
Connection example (towards to the customer):
* Measurement is also possible from the street cabinet towards the customer (segment by
segment).
Connection example (towards to the MDF):
* Measurement is also possible from the street cabinet towards the MDF (segment by
segment).
38 ARGUS Copper Test Manual