Which action is not a process of the AN/TPS-75 Aircraft Control and Warning System?

The action of transmitting pulse coded IFF/SIF from transponders is not a process associated with the AN/TPS-75 Aircraft Control and Warning System. The AN/TPS-75 system primarily focuses on the reception, interrogation, and decoding aspects of IFF/SIF communication.

This system is designed to interrogate IFF/SIF transponders, which means it sends out signals to request identification information from aircraft. Following this, it can decode the replies received from those transponders to generate accurate data for display, such as identifying friendly or hostile aircraft.

However, the actual transmission of pulse coded IFF/SIF signals is typically the responsibility of the aircraft's transponder units, not the ground-based control system like the AN/TPS-75. Thus, while the system plays a crucial role in the identification process, the function of transmitting coded signals is outside its operational scope.