Regulatory Compliance News

FCC Issues Enforcement Notice Against Active Digital Antenna Causing Harmful Public Safety Interference

The Federal Communications Commission (FCC) Enforcement Bureau issued a formal Notification of Harmful Interference under document reference DOC-405626A1, ordering the immediate deactivation of an active indoor digital television antenna that disrupted critical public safety communications. Agents from the Enforcement Bureau traced severe radio frequency interference in the 813–817 MHz band back to a residential condominium, confirming that spurious emissions generated by a powered indoor HDTV antenna directly interfered with the Massachusetts State Police radio communications network. Field investigations verified that the harmful emissions instantly ceased once the active antenna’s power supply was disconnected, demonstrating how unshielded or degraded consumer electronics can inadvertently pollute licensed spectrum.

The regulatory action highlights a growing enforcement focus by the FCC on active consumer equipment and radio frequency devices that fail to maintain electromagnetic compatibility (EMC) in field conditions. Under Part 15 of the FCC rules, unlicensed intentional, unintentional, or incidental radiators are strictly prohibited from causing harmful interference to licensed radio services, particularly primary public safety, aviation, and emergency response bands. Even if a product receives initial Equipment Authorization through Supplier’s Declaration of Conformity (SDoC) or Certification workflows, manufacturers and end-users remain legally obligated to remedy any operational interference, up to and including the permanent removal of the non-compliant device from service.

This incident underscores critical compliance considerations for original equipment manufacturers (OEMs), component suppliers, and distributors of active consumer RF hardware and signal boosters. Manufacturers producing active antennas, low-noise amplifiers (LNAs), and digital TV receivers must ensure internal oscillator circuits, power supply components, and amplification modules maintain robust shielding and out-of-band attenuation. Ensuring strict adherence to FCC Part 15 EMC emissions limits during laboratory certification testing—and incorporating quality controls to prevent component degradation over time—is essential to preventing costly enforcement proceedings, product recalls, and severe interference with mission-critical radio networks.