Comparing Parametric Tests To The Tdr Test - Test Equipment Depot 990DSL User Manual

990DSL
Users Guide

Comparing Parametric Tests to the TDR Test

Table 6-1 provides an overall assessment of the accuracy of the TDR test and
three parametric tests (Opens, Load Coils, and RFL) at locating six common
cable faults. The table highlights both the versatility of the TDR test as well as
the complementary nature of all of the tests and their relative strengths and
weaknesses. You may want to refer to this table when trying to decide which
tests to use in a particular situation.
Table 6-1. TDR vs. Parametric Fault Location Tests
Type of
Cable Fault
Open
Conductor
Partial Open
(Bad Splice)
Split Pair
Bridged Tap
Undesirable
Load Coils
Resistive Fault
6-2
TDR
Excellent Excellent
Excellent
Excellent
Excellent
Distance:
Excellent
Count : -
Excellent
( R < 1 kΩ)
f
CopperPro Tests
Opens Load Coils
Poor
Fair
−
−
Distance: Fair
Count : Good
−
RFL
− −
− −
− −
− −
−
−
Excellent
(any R )
f