In early 1998, Dallas television station WFAA was one of the first to switch from analog to digital broadcasts. What happened at nearby Baylor University Medical Center started a debate over use of wireless spectrum near hospitals that continues today.

As the New York Times reported back then, on the day WFAA switched to digital, wireless heart monitors in Baylor’s heart surgery recovery room stopped working. Technicians were unable to quickly determine the reason for the breakdown, and auxiliary bedside monitors were brought in. At night when the station stopped broadcasting, the wireless monitors started working again—until morning when broadcasting resumed.

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