Shielding requirements cover both the susceptibility of equipment to external signals and which other aspect?

The correct choice addresses the importance of emissions from the equipment as a crucial aspect of shielding requirements. Shielding plays a significant role in minimizing electromagnetic interference (EMI), which can affect both the functionality of avionics equipment and the environment around it. When avionics systems operate, they can generate electromagnetic emissions, which need to be controlled to prevent interference with other nearby electronic devices and systems. Proper shielding ensures that these emissions are contained, maintaining the integrity of the aircraft's operation and adherence to regulatory standards.

Emissions control not only mitigates potential issues with external signals impacting the equipment's performance but also safeguards against the negative effects that the equipment's emissions might have on other critical systems within the aircraft. In contrast, while power consumption, physical durability, and weight limitations are relevant considerations in the design and operation of avionics equipment, they do not directly relate to the necessity of effective shielding in the context of electromagnetic compatibility.