Chapter 9 Communications Circuits 9.9 CIRCUIT ERROR CONDITIONS 9.9.1 Backgroud Noise A normal phenomenon of electrical circuitry resulting from the movement of electrons is called backgroud noise 9.9.2 Impulse Noise Noise on a circuit caused by electrical phenomena such as lighting, switching equipment or motors starting is called impulse noise www.gxmu.edu.cn9.9 CIRCUIT ERROR CONDITIONS 9.9.1 Backgroud Noise A normal phenomenon of electrical circuitry resulting from the movement of electrons is called backgroud noise. 9.9.2 Impulse Noise Noise on a circuit caused by electrical phenomena such as lighting, switching equipment or motors starting is called impulse noise. www.gxmu.edu.cn Chapter 9 Communications Circuits