68x Series
Getting Started
38
For STP cabling systems, select DB-9; for UTP cabling systems, select RJ-45
as the connector type under Network Configuration. You can attach the
instrument at the Multi-station Access Unit (MAU) or at the station. When
connecting at the MAU, use a lobe cable connected between the MAU and the
instrument’s
TO MAU
connector. When connecting at the station, disconnect
the station’s lobe cable from the station and attach it to the instrument’s
TO
MAU
connector. Figure 16 shows the instrument connected to a MAU.
Note
In Token Ring networks and especially for the Phase Jitter test, it is
important to set the connector type correctly. Failure to do so could
result in excessive soft errors, ring purges, and/or beaconing. This is
due to the instrument’s internal termination being improperly set for
your network. The DB-9 setting provides a 150 ohm termination and
the RJ-45 setting provides a 100 ohm termination. Refer to the
“Running a Test” section in this manual for information on
configuring the Connector Type parameter.
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