What is a common cause of common path distortion (CPD) at the ground block?

Common path distortion (CPD) is a phenomenon where signals from multiple sources interfere with each other, particularly as they travel through shared paths in a network. One frequent contributor to this issue is corrosion at the ground block. Corrosion can create resistance at connection points, leading to degraded signals and increased noise levels. When corrosion is present, it can cause variations in the ground potential, impacting the performance of the entire system and resulting in distortion.

Corrosion at the ground block not only affects connectivity but also affects the integrity of the ground path, crucial for maintaining signal quality. A compromised ground can lead to unstable operation of the system, affecting the ability to transmit signals clearly and effectively.