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April 13, 2022

NAB PILOT Develops Transmitter Identification Resource for NextGen TV Stations

TxID table will help test and measurement operations and interference identification for ATSC 3.0

Washington, D.C. -- PILOT, the innovation wing of the National Association of Broadcasters (NAB), today announced the development of a NextGen TV Transmitter ID (TxID) table for voluntary use by broadcasters using the ATSC 3.0 transmission standard. The table and TxID codes can be used to identify individual transmissions for testing, measurement, interference identification and other differentiation purposes.

The ATSC 3.0 suite of standards provides a mechanism for assigning an optional TxID code for each individual NextGen TV transmitter, including main transmitters of full-power and low-power stations, as well as TV translators and on-channel low-power transmitters that are part of single frequency networks (SFNs). No specific methodology for assigning or registering these identifying codes is documented in the ATSC 3.0 standards, but they must be regionally unique.

“ATSC 3.0 stations are rapidly launching all over the United States and this TxID table is an excellent resource for broadcasters,” said Sam Matheny, NAB’s chief technology officer. “It’s important for each main and SFN transmitter to have a unique identifier, and NAB is proud to provide this table to help ensure a consistent format and regional uniqueness. We invite and encourage all ATSC 3.0 broadcasters to use this important tool.”

Under contract from NAB PILOT, Cavell Mertz & Associates, Inc. and The Merrill Weiss Group developed the TxID code table to serve as a voluntary register for the TxID transmitter identification system. NAB PILOT will act as the registration authority for the table.

In the table, TxID code values are assigned to licensed facilities in blocks, providing each station the resources needed to identify multiple transmitters operating under its single license. Each block of TxID codes is selected to be regionally unique for its channel number.

The table can be accessed at


PILOT is a coalition of innovators, educators and advocates dedicated to advancing broadcast technology and cultivating new media opportunities. PILOT propels broadcast television and radio into the future. It provides a platform for innovation, an engine for incubation, a venue for testing new technologies and a forum for broadcaster education. Learn more at

About NAB

The National Association of Broadcasters is the premier advocacy association for America's broadcasters. NAB advances radio and television interests in legislative, regulatory and public affairs. Through advocacy, education and innovation, NAB enables broadcasters to best serve their communities, strengthen their businesses and seize new opportunities in the digital age. Learn more at

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