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Even though the individual TDR tests (described later in this chapter) can be
performed on working pairs with voltage, the TDR Auto-Test should be run on
non-working pairs only. This is because several of its integrated parametric
tests (for example, Opens and Shorts & Grounds) are accurate only when there
are moderate amounts of voltage on the line.
Setting Up a TDR Auto-Test
To set up the Auto-Test, complete the following:
1.
From the
Main
2.
On the setup screen, select the cable type and gauge (refer to Table 6-2)
for the cable you are testing.
Before you run the test, you must select the proper Cable Type and
Gauge. If these two parameters are specified, the CopperPro
automatically uses the industry-standard VOP for that cable type and
gauge. If the actual VOP is known, however, you can supply it as
well, thus creating a custom cable type for the test.
3.
Select the
Pulse Width
auto-range and find the largest reflection, regardless of range. If interested
in reflections within a particular range of the cable, select the pulse width
corresponding to the desired range.
4.
Use the filter (
5.
Use averaging (
6.
If less sensitivity to reflections is desired, enter a lower value for
Detect. Sensitivity
7.
Set up the individual parametric tests.
To do this, you need to display the setup screen for each test and complete
the setup (see the relevant sections in Chapter 4 for setup instructions for
each test).
TDR Testing and Fault Location
menu, select
TDR Auto-Test
from the seven options. Use
) only if a high level of power influence is on the pair.
Fltr
) to smooth out instantaneous noise bursts.
Avg
. If more sensitivity is needed, increase this % value.
. Then, pressD(
Note
TDR Auto-Test
).
Setups
(default) to
Auto
Fault
6
6-5
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