Fluke CableAnalyzer DSP-4100, User Manual

Page: 91 / 216

Autotest
Autotest Results for Coaxial Cabling
3
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1. Attach a channel link interface adapter to the main unit.
2. Turn off any PC nodes connected to the cabling you are testing.
3. If you want the Autotest to report cabling length, remove the terminator from
the far end of the cabling.
4. Turn the rotary switch to AUTOTEST.
5. Verify that the test standard and cable type displayed are correct. You can
change these settings in the SETUP mode.
6. Remove the terminator from the near end of the coaxial cabling. Use the RJ45
to coaxial adapter to connect the test tool to the cabling.
7. Press
T
to start the Autotest.
Autotest Results for Coaxial Cabling
An Autotest on coaxial cabling performs the following tests:
Characteristic Impedance
Note
Impedance measurements require cabling at least 5 m (16 ft) long.
Terminated cabling shorter than this length will always pass the
impedance test. Unterminated cabling shorter than this length will
always fail the impedance test.
The characteristic impedance test determines the approximate characteristic
impedance for the cable. A
PASS
result means that the impedance is within the
limit specified by the selected test standard. A
FAIL
result means that the
impedance exceeds the limit. You can use the HDTDR test to plot the locations
and sizes of all impedance anomalies on the cabling.