 Digital technology is accelerating the convergence of broadcast and computer systems, such that 100 Ohm UTP and FTP cables are being adopted not only for data, but also for control, audio and video transmissions. 'Enhanced Category 5' or 'Cat 5e' is specified to 100 MHz (but quite often tested to 350 MHz), reflecting tougher Near End CrossTalk (NEXT), Far End CrossTalk (FEXT)and Return Loss requirements and the introduction of Power-Sum NEXT (PS NEXT) measurement to support Gigabit Ethernet 1000Base-T. (1000Base-Temploys bi-directional, 4 pair transmission, utilising Digital Signal Processing electronics to cancel signal echo and NEXT. Return Loss determines the extent of the signal echo in each channel. FEXT is increasingly significant due to NEXT cancellation and a Power-Sum limit must be imposed to combat noise coupled from 3 pairs into every other pair). We also stock basic lines to TIA/EIA-568-B.2-1 and ISO/IEC11801 requirements with performance specifications to 600 MHz. | 
