Server SPI Background and Working Group Agenda Material

Gene Milligan Gene_Milligan at
Mon Mar 20 10:51:25 PST 1995

Bill pointed out that communication interfaces have used AC termination for 
years. Perhaps. They have at least used AC coupling. In order to use or allow 
AC coupling without severe problems they also put a priority on the use of 
balanced transmission codes. In order to use inexpensive cabling and in some 
cases unshielded twisted pair at 100 mega transfers per second, they also use 
scrambling techniques which greatly reduce the EMI emission problems.

Is there data on the impact of unbounded balance from near d.c. to 40 Mb/S of a 
SCSI data transmission?


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