Which component pseudo-randomly assigns a center frequency to each pulse?

The component that pseudo-randomly assigns a center frequency to each pulse is Message Security (MSEC). MSEC is designed to enhance the security of the Link 16 communications by ensuring that the tactical data link operates in a secure and reliable manner. In the context of Link 16, MSEC employs an advanced method for frequency hopping, which is essential for maintaining communication integrity and reducing the risk of interception.

This process of pseudo-random frequency assignment helps to prevent adversaries from predicting communication patterns, adding a significant layer of security. MSEC plays a crucial role in ensuring that communications across various platforms remain encrypted and secure, which is vital for successful joint operations.

The other components, while significant within their respective operational roles, do not perform the specific function of assigning center frequencies to pulses. J-Series Messages refer to standardized messages used in the Link 16 system, the Link 16 Time Protocol deals with timing synchronization among participants, and JREAP focuses on how information is transmitted between different networks, but none of these elements are responsible for the specific task of pseudo-random frequency assignment.