While the RF field test parameters mandated by TIA and ISO adequately confirm the cable’s standalone performance, more testing is needed to confirm the immunity of the cable in presence of external electromagnetic interference (EMI), aka Noise. EMI is caused by alien crosstalk from adjacent cables, noise from wireless communications systems, or even vehicles driving nearby.
TCL (Transverse Conversion Loss), measured at the near end, is an assessment of how well the wires constituting a cabling pair are matched and is an important parameter to confirm the EMI immunity of the cable. ELTCTL (Equal Level Transverse Conversion Transfer Loss) is the measurement used to evaluate this noise immunity, but measured at the far end and equalized for length.
TestPro measures and reports TCL and ELTCTL from both ends in every Autotest without requiring additional measurement time. That means, a 6-second CAT6A Autotest includes TCL measurement. By default, TCL is reported as an information-only measurement and not included in pass/fail result.