23
Figure 2-14 displays the trace for a 75 Ohm coax cable with a series resistive fault marked by the
Cursor 1. This is typical of a poor connection or corroded barrel connector.
Figure 2-14
Figure 2-15 is an example of water in a 75 Ohm cable and figure 2-16 is an example of a wet tap.
Remember TDR distances in and after a wet section are invalid as the velocity slows to an
unknown velocity in the wet section.
Figure 2-15
Figure 2-16
Figure 2-17 is an example of a poor splice in a twisted pair cable. A good splice will have a
smaller upward appearance, but far less than 15% over the cable’s normal impedance.
Additionally, the splice is adding resistance indicating a series resistive fault in the splice
.
Figure 2-17
Summary of Contents for 20TDR
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