Teseq, formerly Schaffner Test Systems, have introduced a new impedance stabilisation network (ISN) that is compatible with the highest speed class of Ethernet / Category 6 cables.
The ISN T8-Cat 6 is designed for measurements of up to four unshielded single balanced pairs of cables. The ISN T8-Cat 6 is available from Westek Electronics .
The Teseq model ISN T8-Cat 6 impedance stabilisation network conforms to the new requirements for EMC testing of telecommunication equipment having to comply with CISPR 22 edition 5.0 and EN 55022:2006.
These standards specify the new longitudinal cable loss (LCL) characteristics for Cat 6 cable. LCL is mainly due to the unwanted conversion of balanced signals into common mode signals.
The CISPR 22-based coupling/decoupling network is ideal for use with applications employing up to 1000 BaseT operation, Power over Ethernet (PoE) and immunity tests of office, telecom and networking equipment according to IEC 61000-4-6.
Calibration adapter sets (CAS) are available for Teseq’s family of ISNs and an extension of the CAS ISN adapter set is available for the ISN T8-Cat 6. Its measuring parameters are CM impedance, phase angle, voltage division factor, isolation and LCL.
The ISN is located between the EUT and the auxiliary equipment or load, which is necessary for the operation of the EUT. The network establishes the common mode termination impedance as seen by the telecommunication port during measurement.
Consisting of one basic network, the ISN T8-Cat6, has RJ-45 connectors for the EUT and auxiliary equipment. The ISN features maximum line to ground voltages of 63 VAC and 100 VDC, and maximum current ratings of 400mA per line and 800mA per pair.