On the heels of the release of the ATSC 3.0 suite of standards, Nexstar, Sinclair Broadcast Group and Univision announced that they are working with American Tower to construct and operate a Single Frequency Network (SFN) system in Dallas, Texas.
They call this “the first step toward a national launch” that will harness a key capability of ATSC 3.0 – to coordinate signals in a given market with multiple broadcast towers to further enhance deep indoor and mobile reception.
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From atsc.com