RF exposure limits and FCC Part 97 regulatory concepts for amateur radio station operation.
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- What is FCC Part 97?
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The federal regulation governing amateur radio service in the United States- Name the three amateur radio license classes in the United States.
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Technician, General, and Extra- What is the FCC RF exposure limit for controlled environments at amateur radio stations?
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5 milliwatts per square centimeter, averaged over 6 minutes- What RF exposure limit applies to the general public in areas they might access?
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1 milliwatt per square centimeter, averaged over 30 minutes (uncontrolled exposure)- Below what frequency does the FCC consider there to be no RF hazard?
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300 kilohertz (300 kHz)- What is duty cycle in the context of RF safety?
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The percentage of time a transmitter is actually transmitting compared to total time- What must be posted at an amateur radio station transmitting RF fields that exceed exposure limits?
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An RF hazard warning sign or label- What does FCC Part 97.113 prohibit?
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Business communications and transmissions for commercial purposes- How often must an amateur radio operator transmit their call sign?
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At least once every 10 minutes during a communication and at the end of communication- What is the primary responsibility of an amateur radio operator regarding harmful interference?
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To cease transmission immediately and take steps to eliminate interference when notified- What frequency range constitutes the 2-meter amateur band?
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144 to 148 megahertz (144-148 MHz)- What frequency range constitutes the 70-centimeter amateur band?
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420 to 450 megahertz (420-450 MHz)- Must amateur radio equipment be type accepted by the FCC?
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Yes, transmitting equipment must be type accepted or FCC certified to be legally operated- What is a repeater in amateur radio?
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A station that receives a signal on one frequency and retransmits it on another frequency- What is a standard offset used for 2-meter repeaters in North America?
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Plus or minus 600 kilohertz from the input frequency
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