In percent, what are the minimum and maximum permissible power limits for an FM station without a sub carrier?

The minimum and maximum permissible power limits for an FM station without a subcarrier are important for ensuring that the station operates within regulatory frameworks while maintaining signal quality and performance. According to the Federal Communications Commission (FCC) regulations, FM transmitters have specified operational power levels that can be adjusted within designated parameters.

The correct choice reflects the guidelines that require FM stations to maintain at least 90% of their authorized power to ensure effective broadcasting without interference or degradation of service. Additionally, the maximum permissible power limit of 105% allows for minimal variances in power output due to equipment tolerances and normal operating conditions. This range ensures that the FM station remains compliant with regulations while providing optimal coverage and audio quality across its broadcast area.

Understanding these power limits is crucial for operators to maintain compliance and provide reliable service to their listeners while avoiding potential penalties for exceeding specified power levels.