Final answer:
The radio station Martin Payne worked in on the TV show "Martin" was WZUP.
Step-by-step explanation:
The name of the radio station Martin Payne worked in on the TV show "Martin" was WZUP. WZUP was a fictional radio station featured in the sitcom, where Martin Payne, played by Martin Lawrence, worked as a host on the morning show. The radio station served as a recurring setting on the show, providing comedic moments and storylines.