Fluke CableAnalyzer DSX-5000, Technical Reference Handbook, Page: 215 / 700

Chapter 5: Certify Coaxial Cabling
About Splitters
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Figure 82. Coaxial Insertion Loss Results
About Splitters
If you get these results, there might be a splitter on the cable:
 The tester cannot find the remote.
 The tester looses communication with the remote. The test
might continue, then loose communication again as the
splitter interferes with the communication signal.
 The length test shows
End not found
.
 The resistance test shows an open.
 The HDTDR plot shows a reflection that has an unusual shape.
Because splitters can cause unreliable test results, you should not
do tests through them.