The Hdtdr Analyzer - Fluke DTX-1800 Technical Reference Handbook

DTX Series CableAnalyzer
Technical Reference Handbook

The HDTDR Analyzer

™
The HDTDR (High-Definition Time Domain Reflectometry)
analyzer plots the locations and magnitudes of reflections
caused by impedance anomalies. The analyzer, along with
the tester's automatic diagnostics, helps you isolate the
causes of return loss failures.
Running the HDTDR Analyzer
After an Autotest, you can view HDTDR results if the
Autotest test failed or had a PASS* result, or if HDTDX/
HDTDR in Setup is set to All AUTOTESTs.
To see HDTDR results for failed Autotest, select HDTDR on
the Autotest Summary screen.
To run the HDTDR test as a single test:
Though you can run the HDTDR analyzer without
a smart remote, the following steps assume you
are using a remote.
1 Turn the rotary switch to SINGLE TEST and verify that
the test limit and cable type are correct. Change them
in SETUP if necessary.
2 Attach the appropriate interface adapters to the tester
and smart remote.
6-10
Note
3 Turn on the smart remote; then connect the tester and
remote to the cabling.
4 Turn the rotary switch to SINGLE TEST, select HDTDR
P
Analyzer; then press
5 To run the HDTDR analyzer continuously, press
Plot by Pair to select a pair; then press
scanning function.
6 To save the results, press
N
then press again.
If Store Plot Data is set to No, the HDTDR plot will
not be included in saved results.
Figure 6-3 describes the HDTDR analyzer plot.
Recognizing Faults on HDTDR Plots
Figure 6-4 on page 6-12 shows how some common faults
appear on HDTDR plots.
.
L
H
to start the
N
. Select or create a cable ID;
Note