The receiver equalizer has variable gain to compensate for attenuation through the transmission line. Any differences in transmit amplitude are removed by the input pre-driver. They provide variable gain since EqcoLogic's equalizers are used in pairs. They are auto-adaptive in that they control a multiple pole analog filter that compensates for attenuation of the cable. This functionality includes the following unique characteristics. These FireWire 800 Smart Cables feature smart connectors in which each end of the cable is actually a "Smart" device using EqcoLogic's equalizer providing much of the functionality of a standard repeater. Longer cables will be available in the future as will custom length options under an OEM/volume request basis. The cables are currently available in 20m (65 ft) and 40m (130 ft) lengths. The FireWire 800 "Smart Cables"&tm allow significant extension of FireWire topologies via a single 75 Ohm coaxial type cable and no need for multiple repeaters or bus extenders. Unibrain introduces a new family of long FireWire 800 cables utilizing smart technology to overcome the 10 meter (32.8F) limitation of standard FireWire 800 cabling. Unibrain Smart FireWire 800 1394b 9pin to 9pin Cable UB Double Screw Lock
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