Question
Which of the following is used to determine RF exposure from a transmitted signal?
Answer Options
- A) Its duty cycle
- B) Its frequency
- C) Its power density
- D) All these choices are correct
Correct Answer: D
Explanation
FCC regulations §97.13(c)(2) require all amateur operators to evaluate their station for compliance with RF exposure limits. The determination of RF exposure is complex and depends on multiple factors related to both the signal characteristics and the environment.
Factors used to determine RF exposure include the signal’s frequency (which determines the body’s absorption rate), the power density (which measures the strength of the field), and the signal’s duty cycle (the percentage of time the transmitter is actually on). All these choices are necessary for an accurate RF exposure evaluation.
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