HP Surestore 125ex - Optical Jukebox Manual page 108

B
B
O
PERATING
[1]Bus Adapter - connecting point for all SCSI devices
[2] Wide SCSI Device - accepts IDs from 0 to 15
[3] Wide SCSI Cable - 68-pin SCSI Cable
[4] 68-50-Pin SCSI Cable - adapts from wide to narrow connectors - high 18 lines must be terminated
NEXT
[5] Narrow SCSI Device - accepts IDs from 0 to 7
[5] Terminator - device on the ends of a SCSI bus to prevent reflected signals on the bus (50-pin)
PREVIOUS
It is very important that the 68-pin to 50-pin cable is properly configured to assure that the eighteen truncated lines are
properly terminated.
M
JUMP
IXING
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OW
CONTENTS
On a low-voltage differential (LVD) bus, if the jukebox senses a single-ended device on the bus, the bus will be oper-
ated as a single-ended bus. You must not mix high-voltage differential buses with either low-voltage differential or sin-
gle-ended buses. High-voltage signals are on different pins and may damage low-voltage differential circuits.
INDEX
C
ABLE
This jukebox can use either a single-ended or low-voltage differential bus. When using a single-ended bus, you have
8.50 feet (2.59 metres) available for an external bus. (3 metres allowable minus 0.41 metres for internal cabling.)
If you are using a low-voltage differential bus, you have 38.04 feet (11.59 metres) available for an external bus. (12
T J
HIS UKEBOX ON A
S -E
INGLE NDED
-V D
OLTAGE IFFERENTIAL
L
ENGTHS
SCSI B
US
, H -V
IGH OLTAGE
D
EVICES
D ,
IFFERENTIAL AND
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