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4 Requirements for Use
Requirements for Connecting a SCSI Cable
The cable for connecting the tape drive to the SCSI bus is not provided with the tape drive. You must provide a cable that complies with the appropriate safety and regulatory agency requirements. To comply with FCC, Canadian DOC, and VDE limits, the tape drive requires shielded cables when the cables are external to the mounting enclosure.
Impedance
Ideally, to match the cable terminators, the cable should have a characteristic impedance of 122 ohms (differential) or 132 ohms
#Important To minimize discontinuities and signal reflections, Exabyte recommends that cables used on the same bus have the same impedances.
Cable Length
The maximum length of the SCSI cable depends on whether you are using a
For
0.1meters (4 inches) is allowed off the mainline interconnection within any connected equipment.
For differential SCSI configurations, the maximum allowable bus length is 25 meters (82 feet). A stub length of no more than
0.2meters (8 inches) is allowed off the mainline interconnection within any connected equipment.
May 1994 | ||
| (Standard and XL) |
|