How does signal attenuation in the sub-band frequency spectrum compare to that at forward path frequencies?

The correct answer indicates that signal attenuation is significantly less in the sub-band compared to forward path frequencies. This phenomenon can be attributed to the frequency characteristics of signal transmission in cable systems.

In communication systems, higher frequencies typically experience greater attenuation due to several factors, such as increased resistance and dielectric losses in the cable medium. The forward path frequencies, which are generally higher, suffer from these losses more severely than lower frequencies found in the sub-band spectrum.

As a result, signals transmitted in the sub-band can maintain their integrity better over long distances, allowing for improved signal quality and reliability. This is particularly beneficial in applications where maintaining a strong signal is critical, as lower attenuation in the sub-band enables effective communication with less need for amplification and signal boosting.