Chapter 2
Test Setup Procedures
Another example of performing DUALmode would be the determination of headroom
with regards to higher bandwidth for future applications. Previously, you could visually
inspect Category 5e Permanent Link Certification records and assess whether there is
enough headroom to run the higher bandwidth applications. But in order to access
complete definitive data, a Category 6 certification tests would also be required. These
actions would normally be ignored due to the increased testing costs.
With DUALmode, you could require that the system be certified to Category 5e
Standards and that the system also be tested against the Category 6 limits. That way,
in the future, your client would have definitive data about which of the links could
support higher bandwidth applications. This information would be essential in any
decision to re-terminate links using higher Category jacks or to pull higher category
cable.
PERFORMING IN DUALMODE:
1.
Move the cursor to select the Cable Type and press ENTER. The Cable Type screen
appears.
2.
Move the cursor to Twisted Pair DUALmode and press ENTER. The DUALmode
tests menu appears.
3.
Select the two (2) cable type combination to be tested in DUALmode and press
ENTER.
4.
Press AUTOTEST. The PASS/FAIL results will be displayed. (Figure 2-20)
Worst-case margins and values for NEXT, RL, ACR and Attenuation are shown for
each of the DUALmode tests.
Figure 2-20: DUALmode Autotest
5.
Press ENTER on the highlighted test to display its related graphic results.
2-15
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