- Stopband and attenuation: This broadcast band stop filter suppresses 88-108 MHz with an attenuation of about 50 dB or more, helping to reduce strong FM broadcast interference. - Warning and caveat: The notch is relative and the filter may also affect aviation frequencies. Plan accordingly if aviation reception is required. - Why you need it: When receiving in areas with very strong FM broadcasts, this filter helps prevent receiver overload and preserves clearer performance on adjacent or monitored frequencies. - Image frequency awareness: If the image of a BCFM broadcast signal appears on the spectrum display as if it were another signal, this filter can help you assess and manage that interference. - Use with RF receivers: Particularly useful for radio receivers that experience overload from nearby FM broadcast signals, improving overall signal quality in affected bands. - Practical use scenarios: - In urban or rural environments with dominant FM broadcast signals, install this filter to reduce overload and improve reception on nearby frequencies. - In spectrum monitoring or scanning setups where FM interference masks weak signals, use the filter to reveal the desired signals more clearly. - When evaluating spectrum displays for image or mirror frequencies, apply the filter to determine if the BCFM signal is contributing to apparent interference.