The ABC Television series, “Last Man Standing” is about Mike Baxter (Tim Allen), a marketing executive for “Outdoor Man,” a fictitious sporting goods store in Colorado.

Mike, is a “man’s man” and involved in all kinds of outdoor activities including hunting, fishing, camping, hiking, boating. Likewise, Mike (and Tim) has a love for all the electronics that go with these activities. Among Mike’s interests is Amateur Radio (Ham Radio). 

In the upcoming episode "Odd Couple Out", we established Tim's character (Mike Baxter), as KA0XTT. This is a call sign the show cleared for use on air. "XTT" is a bit of a private joke as Tim's character name on "Home Improvement" was Tim Taylor. So, ex T. T.