Chapter 7
Testing Twisted Pairs
Page 7-33
Testing Tips
SELECTING PERFORMANCE MODULE (PM) AND CABLE
SPECIFICATION
1.
Select and install the appropriate Performance Module PM for
the type of cable under test.
2.
Select the correct cable test standard you wish to test to.
If you select one of the EIA/TIA Category 3, 4, or 5 Basic Link
test standards, the accuracy (Level I or Level II) will be determined
by the Performance Module you use.
Level II measurement accuracy can only be assured with the use of
the 8-position modular plug PM. See Appendix A, Test Standards
for more explanation of the EIA/TIA TSB-67 Link Performance
Standard.
CONNECTING THE SEGMENT UNDER TEST
CAUTION
If you see and/or hear an OVERVOLTAGE
WARNING when connecting to a patch panel or
wall plate, disconnect the unit immediately.
You may have connected to a telephone line
carrying ringing voltages.
The LANcat is designed with special protection
circuitry that allows it to withstand ringing
voltages with no damage. However, it is best to
avoid connecting the LANcat to live circuits.
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