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Using terminators
1-8
Case 3
Similar to case 2, but the non-Polaroid SCSI peripheral has a
50-pin port and a 25-pin port. In this case, you can use the
cable provided with the scanner, but you will need a terminator.
SCSI peripheral cables and terminators are not included
Note:
with your Polaroid scanner but can be obtained from any com-
puter reseller. For your SCSI peripheral cable, use cables no
longer than 4 feet; longer cables may cause SCSI-related prob-
lems. The use of terminators is explained more fully in the next
section,
Using terminators.
Depending on your system, you may need to use a cable termi-
nator on your installation. A terminator is a piece of electrical
equipment installed at the end of a SCSI chain linking your
computer with a SCSI device. The terminator ensures that the
electrical impulses going through the path are properly routed
and absorbed.
When to use a terminator
Polaroid scanners are not internally terminated, and Polaroid
does not provide a terminator in its scanner package. You may
or may not need a terminator, but because of varying SCSI stan-
dards, there is no way to predict with absolute certainty
whether or not you need one.
If you get odd symptoms after hooking up your Macintosh and
scanner, or if your Mac refuses to boot up properly after you
installed the scanner, this may indicate that you need a termina-
scanner
terminator
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