DTX Series CableAnalyzer
Technical Reference Handbook
3-34
Monitoring Impulse Noise
Impulse noise is electrical noise generated by fluorescent
lights, electric motors, electric heaters and air conditioners,
photocopiers, refrigerators, microwave ovens, and other
electric devices. Active links in the same pathway can also
cause noise.
Noise distorts the shape of digital signals, as shown in
Figure 3-24. Too much noise can cause transmission errors,
resulting in poor network performance.
The impulse noise test lets you monitor noise on inactive
twisted pair cabling to determine if the noise may affect
network operation.
amd95f.eps
Figure 3-24. Causes and Effects of Noise
Received
signals
distorted
by noise
Signal
source
LAN cabling
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