Exabyte 230D Library Installation And Operation Manual page 236

Appendix A
Exabyte recommends wide SCSI cables that conform to SCSI-3
specifications, as described in the following table.
* Excluding TERMPWR conductors
† Recommended specification
‡ The maximum difference in propagation time allowed between any two SCSI bus
* * Measured differentially
222
Cable impedance (in
Ohms)*
Impedance difference
between any two signals
on the same cable†
b
Conductor size
Cable skew delay‡
Propagation delay
Pair-to-pair propagation
delta delay
Signal attenuation
signals measured between any two SCSI devices
Max 160
Nom 122
Min 115
20 Ohms
# 30 AWG min
2.5 nS
5.4 nS/meter max
0.15 nS/meter max
0.095 db max/meter @ 5 MHz* *
Exabyte 230D