LocusUSA Receives New U.S. Patent for Analyzing Radio Performance Over-the-Air While in Use

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WEST MELBOURNE, Fla. – LocusUSA, a leader in the area of RF (radio frequency) capture for alignment analysis and radio location, has been granted a new patent from the United States Patent and Trademark Office (USPTO). The U.S. patent, number 9681321B2, entitled “Method and System for Analyzing Radio Performance During Over-the-Air (OTA) Operation”, was issued in June 2017.

Automatic Frequency Control (AFC) is an embedded technology incorporated into most land mobile radio (LMR) systems to temporarily adjust specific metrics including frequency misalignment or error. A misaligned radio will experience issues connecting to the LMR system. As the radio continues to drift further out of alignment AFC will no longer engage resulting in a hard failure. A radio like this, even while appearing to be temporarily in spec, is a definite candidate for maintenance.

This new patent technique will identify how much AFC correction is being applied to a subscriber radio in real-time, while it is operational and deployed in the field. It measures the temporary AFC adjustment by capturing and analyzing all control channel transmissions from the radio and identifies, by Radio ID, which ones are in jeopardy of failing while in use.

“Our technology will allow agencies to feel confident their portable and mobile radios will work whenever and wherever they are needed,” said Joseph Rey, managing partner of LocusUSA. “It will enable them to experience a higher level of radio performance while reducing their annual radio maintenance costs.”

The company presently holds seven United States patents, three Australian patents, and one Canadian patent.

For more information on LocusUSA, visit

About LocusUSA
LocusUSA is an engineering and software development company in West Melbourne on the Space Coast of Florida since 2001. It is a leader in the area of RF capture for radio analysis and location. The ability to capture and analyze the actual waveform of a radio transmission led to the development of DiagnostX, a patented system that can measure the alignment and operating characteristics of a radio, long-range over-the-air in real-time without user intervention.

LocusUSA supports government customers across the United States and Canada on the local, state and federal levels with this first-of-its-kind, proactive tool, ensuring the optimal performance of a radio system.

To learn more, visit or connect with LocusUSA on YouTube, LinkedIn, Twitter, and Facebook.