Brazil's National Telecommunications Agency (ANATEL) has issued Act No. 5885, approving updated technical requirements and test procedures for the conformity assessment of indoor signal boosters used for the personal mobile service (SMP).

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The new act replaces Act No. 2271 of February 2022 and lays down updated compliance requirements for wideband and selective SMP signal boosters used indoors and in vehicles.

The framework introduces detailed limits relating to:

· Transmit power limits;

· Gain control;

· Out-of-band emissions;

· Noise limits;

· Frequency stability;

· Intermodulation;

· Automatic anti-oscillation mechanisms.

ANATEL also mandates a number of self-monitoring and interference mitigation functions, including:

· Automatic gain control (AGC);

· Automatic shutdown during harmful interference;

· Anti-oscillation protection;

· Uplink inactivity monitoring.

The regulation also requires clear, legible warning statements on the device housing, packaging and operating manual, together with a user guide explaining the provider's authorisation and the responsibilities for intervention.