Speakerguy
Active Member
In the US, the amount of EMI permitted is much higher than what is actually required to interfere with most FM tuners. Specifically, I believe what's permissible is no more than 250uV/m at 3m.
Is there a simple broadband noise circuit that will block the FM band within the legal requirement? I've done it unintentionally with PWM amp chips before but I was probably also exceeding FCC rules. The aim of this project is to keep a workplace free of inappropriate political and/or religious programming.
Is there a simple broadband noise circuit that will block the FM band within the legal requirement? I've done it unintentionally with PWM amp chips before but I was probably also exceeding FCC rules. The aim of this project is to keep a workplace free of inappropriate political and/or religious programming.
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