iii
Contents
Safety
Preface
1
Introduction
1.1
General Description
1–1
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2
Problem Solving
2.1
Introduction
2–1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2
Normal Power Up
2–2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3
Self-Test Diagnostics (Overview)
2–4
. . . . . . . . . . . . . . . . . . . . . . . .
2.4
Recommended Approach to Problem Solving
2–5
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2.4.1
Problem-Solving Tools and Components
2–6
. . . . . . . . . . . . . . . .
2.4.2
Running the Self-Test Diagnostics
2–6
. . . . . . . . . . . . . . . . . . . . .
2.4.3
Visually Inspecting the Bridge
2–6
. . . . . . . . . . . . . . . . . . . . . . . .
2.4.4
Interpreting the LED Indicators
2–9
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2.4.5
If the Problem Still Exists
2–13
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2.4.6
Performing Loopback Testing
2–18
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2.4.6.1
Preparing the Unit for Loopback Testing
2–18
. . . . . . . . . . . . . .
2.4.6.2
Installing the FDDI Loopback Connector(s)
2–19
. . . . . . . . . . .
2.4.6.3
Installing the NI Loopback Connector(s)
2–20
. . . . . . . . . . . . . .
2.4.6.4
Running the Loopback Test and Observing the Results
2–22
. . .
2.4.6.5
Returning to Normal Operation
2–22
. . . . . . . . . . . . . . . . . . . . .
2.4.7
Measuring the FI Power
2–23
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