标准编号：ISO/IEC 14776-121:2010
中文名称：信息技术 小型计算机系统接口（SCSI） 第121部分：无源互连性能（PIP）
英文名称：Information technology — Small Computer System Interface (SCSI) — Part 121: Passive Interconnect Performance (PIP)
发布日期：2010-10
标准范围
In the past only the performance requirements for uniform bulk cable (called "media" in earlier standards)have been specified in SCSI standards. Since bulk cable provides only part of the electrical path in a SCSIbus segment, the performance requirements of the interconnect comprising the path is incomplete if onlybulk cable is considered. This document expands the coverage to the complete assembled interconnectincluding connectors, uniform bulk cable, and non-uniform bulk cable. A syntax and framework isdescribed for all types of passive interconnect. The methodology for performing the electricalmeasurements required to determine compliance with the performance requirements for bulk cable ofseveral types, various assembled interconnects and printed circuit board designs is included.Details of the measurement methodology are specified to minimize the difference in measured results fromdifferent electrical testing laboratories. Details include calibration, fixturing and sample preparation,equipment, measurement procedure and data output format.
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