IDEAL Networks LanTEK III, Руководство пользователя

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LanTEK III 161809 Iss 2
User Manual Page66
6.14 Delay and Skew Test
This test determines the delay of a test signal that was fed at one end of the cable to the
other end of the cable. The delay skew indicates the difference between the measured
delay of the corresponding wire pair and the wire pair with the lowest delay value. The
limits specified for delay and skew depend on selected cable type.
Fig. 83 Delay and Skew Test
6.14.1 Delay and Skew Test Error
The delay and skew measurements usually result in slightly different values for the
individual wire pairs of a cable. However, a large difference indicates a cable fault or a
damaged wire pair.
6.15 Capacitance Test
This test determines the mutual capacitance between the two conductors of each wire pair,
to ensure that the capacitance of the corresponding cable type has not been impaired by
the installation.
• The capacitance test of the analysis mode indicates the overall capacitance in
Nanofarad (nF).
•
The Autotest measures the overall capacitance in Picofarad (pF) per meter or foot.
Fig. 84 Capacitance Test