Telebyte Broadband-VxT-48 xTalk Emulator for vectored VDSL2 testing

Telebyte’s VxT-48 xTalk Emulator is a solution for physical layer testing of equipment that utilises vectoring technology.

The technology allows for a more efficient utilisation of existing copper infrastructure by cancelling the crosstalk between neighbouring pairs within a cable. This is said to increase data rates far beyond current levels, making bandwidth-intensive applications such as IPTV and triple play available in areas where it was not possible before. It offers repeatable and configurable vectoring performance testing of up to 48 independent loops in one complete unit. Multiple units are suitable for parallel testing to ensure consistent performance from site to site. The product design emulates FEXT between loops 2, 4 and 6 of WT-249 (Revision 08).

The VxT-48 emulates the symmetric model of the ATIS multiple-input multiple-output (NIPP-NAI-2009-014R3) on 48 channels (using the upper-left 48 x 48 quadrant of the 100 x 100 random-drawn matrix). It also models crosstalk between xDSL multipairs within a cable binder and is sufficient for automatically running test cases for systems with vectoring capabilities. The simulation accuracy is principally focused on the attenuation of the direct and crosstalk paths rather than the phase/delays.