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Forced Perfect Termination
This is the most complex and efficient
method of SCSI termination. A cable with Forced Perfect termination
can change its impedance to compensate for variations along the bus.
Forced Perfect terminators force the impedance of the cable to match
each device through diode switching and voltage biasing. Forced Perfect
termination is seldom used now because Ultra2 and Ultra160 buses require
multimode terminators. Forced Perfect terminators are more expensive
than active terminators. Using active termination, high-quality cables
and keeping the bus length as short as possible will improve reliabil-ity
as much as Forced Perfect termination.
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CertiGuide to A+ (A+ 4 Real) (http://www.CertiGuide.com/apfr/) on CertiGuide.com
Version 1.0 - Version Date: March 29, 2005
Adapted with permission from a work created by Tcat Houser et al.
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