NCTI Service Technician Practice Exam

An increase in cable temperature directly affects cable attenuation and signal level in a specific way. As the temperature of the cable rises, the attenuation (loss of signal strength as it travels through the cable) also increases. This increased attenuation occurs due to the fact that higher temperatures result in greater resistance within the cable, leading to more signal loss.

In terms of signal level, as attenuation increases, the effective strength of the signal that reaches the end of the cable will decrease. A hotter cable means that more of the signal energy is lost as it travels, which reduces the signal level at the receiving end.

Therefore, when cable temperature increases, it leads to greater attenuation and a corresponding decrease in signal level. This relationship is critical for technicians to understand, as it impacts the overall performance and reliability of communication systems.