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Insertion Loss
Insertion loss is also known as attenuation.
Insertion loss is the loss of signal strength over the cabling,
as shown in Figure 3-13. Insertion loss is caused by the
resistance of the copper wire and connecting hardware and
by leakage of electrical energy through the cable's
insulation.
Signal
source
Note
Figure 3-13. Insertion Loss is a Decrease in Signal Strength
Certifying Twisted Pair Cabling
Twisted Pair Autotest Results
At higher frequencies, signals tend to travel only near the
surface of a conductor. This "skin effect", along with the
cabling's inductance and capacitance, cause insertion loss to
increase with frequency.
Figure 3-14 describes the insertion loss plot.
3
Insertion loss
Signal
output
AMD90F.EPS
3-21
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