Nonshielded Cable - HP 10343B Operating Manual

Nonshielded
If a nonshielded SCSI ribbon cable is used with connectors clamped in the
Cable
center of its length, it should be connected as follows:
1. Turn off the power to your bus system and logic analyzer.
2. Plug one of the connectors from the ribbon cable into the dual-row
nonshielded connector on the HP 10343B.
3. Turn on the bus and logic analyzer.
The connectors on the HP 10343B are tied in parallel so that all the
connectors and cable combinations can be used with a Single-Ended or
Differential Bus. Also, there is always at least one connector that is not
used. This connector may be used for additional analysis with an
oscilloscope or other measurement device.
There are two connectors inside of the 10343B interface that can be
reached by opening up the interface from the bottom of the HP 10269A/B.
These connectors are the outputs of the input comparitors and may be
used for looking at the SCSI Bus with an oscilloscope or other
measurement device. These connectors are particularly useful for looking
at the differential bus since their outputs give a single-ended
representation of the bus. The outputs of the connectors are delayed from
the actual bus by about 20 nanoseconds. These outputs are positive true
on the HP 10343B, but are negative true on the SCSI bus.
SCSI Bus Preprocessing
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