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Effects of cable losses

Posted: 15 Jan 2009     Print Version  Bookmark and Share

Keywords:automatic test equipment  comparator  parametric measurement unit 

There are many test companies that design, build, and ship large-pin-count automatic test equipment. These testers have complex ICs that drive each pin of the tester. A tester could have as many as 4096 pins. In each pin, there is usually a driver, comparator, load, and sometimes even a parametric measurement unit. These electronics are attached to a cable, which is then connected to the pin. To keep costs down, a vendor may choose to use low quality cables. All cables, especially low-quality ones, suffer from signal losses that reduce the ultimate performance of the tester.

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