Spectra Logic 10000 User Manual

Appendix A.  Library Specifications

121

• We recommend using active SCSI terminators on fast single-ended SCSI busses. The 

active terminator helps maintain a high degree of signal integrity and improves 
noise immunity.

• A minus sign (-) next to the signal indicates an active low signal.

• All passive terminators use a 220

Ω pull-up resistor and 330Ω pull-down resistor for 

each signal. Resistor tolerances in the terminator network are 

±5%, or less. Use 

resistors with 

±1% tolerance for improved noise margins.

25

SR/+RST

59

-RST/-RST

26

SR/+MSG

60

-MSG/-MSG

27

SR/+SEL

61

-SEL/-SEL

28

SR/+C/D

62

-C/D/-C/D

29

SR/+REQ

63

-REQ/-REQ

30

SR/+I/O

64

-I/O/-I/O

31

SR/+DB8

65

-DB8/-DB8

32

SR/+DB9

66

-DB9/-DB9

33

SR/+DB10

67

-DB10/-DB10

34

SR/+DB11

68

-DB11/-DB11