Trilithic 180 DSP User Manual

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Page IV-143
180 DSP Operation Manual
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Signal Level Meter
Overview
The Frequency Domain Reectometer (FDR) Measurement is an optional feature of the 180
DSP. If you do not have this option, call Trilithic at (800) 344-2412 in order to purchase an
option activation code and start using this option today.
To view the installed functions on your instrument, see Section II: Setup Menu, Chapter 2:
Instrument Information.
Select the FDR icon as shown in the image
to the right to perform an FDR measurement
using the 180 DSP.
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
reected wave to determine the distance
to various sources of reection (opens,
shorts, splitters, etc.). The reecting events
are indicated on an amplitude versus distance display, and markers are used to identify the
distance to the source of the reection, and the return loss at that point.
The Frequency Reectometer 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 softkey to change the distance that is displayed on the measurement trace.
Frequency Domain Reectometer
(OPTIONAL)
Chapter 7
Full Span Zoomed to Fault

Trilithic 180 DSP Specifications

General

Brand	Trilithic
Model	180 DSP
Category	Measuring Instruments
Language	English