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Page IV-169
720 DSP Operation Manual
Business Services Meter
Overview
Frequency Domain Reflectometer
Chapter 10
Full Span
Zoomed to Fault
The FDR Measurement provides a simple, convenient and accurate tool for determining the
distance to cable faults. This option works by sending a sweep into the cable and analyzing
the complex reflected wave to determine the distance to various sources of reflection (opens,
shorts, splitters, etc.). The reflecting events are indicated on an amplitude versus distance
display, and markers are used to identify the distance to the source of the reflection, and the
return loss at that point.
Select the
FDR
icon as shown in the image
to the right to perform an FDR measurement
using the 720 DSP.
The
Frequency Reflectometer
screen will
be displayed as shown in the images below.
This screen displays a measurement trace
along with distances to faults and the level at
each fault.
Use the
Zoom In
and
Zoom Out
softkeys to
change the distance that is displayed on the
measurement trace.
Summary of Contents for 720 DSP
Page 23: ...www trilithic com 720 DSP Business Certification Meter Section I The Basics ...
Page 79: ...www trilithic com 720 DSP Business Certification Meter Section II Setup Menu ...
Page 199: ...www trilithic com 720 DSP Business Certification Meter Section III Autotest Menu ...
Page 221: ...www trilithic com 720 DSP Business Certification Meter Section IV Troubleshoot Menu ...
Page 413: ...www trilithic com 720 DSP Business Certification Meter Section V Utility Menu ...
Page 429: ...www trilithic com 720 DSP Business Certification Meter Section VI Appendix ...
Page 440: ...9710 Park Davis Drive Indianapolis IN 46235 317 895 3600 www trilithic com Made in U S A ...