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T0C06

SAFETY · RF hazards: radiation exposure, proximity to antennas, recognized safe power levels, radiation types, duty cycle

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Which of the following is an acceptable method to determine whether your station complies with FCC RF exposure regulations?

  1. ABy calculation based on FCC OET Bulletin 65
  2. BBy calculation based on computer modeling
  3. CBy measurement of field strength using calibrated equipment
  4. DAll these choices are correct
Why The FCC does not mandate one single technique for showing your station meets the MPE (maximum permissible exposure) limits; it accepts any reasonable, competent method. OET Bulletin 65 and its Supplement B give tables and formulas for typical amateur setups, computer modeling such as antenna simulation software can predict field strength at nearby locations, and direct measurement with calibrated field strength meters or probes is also valid. Whichever route you take, you must keep the evaluation in mind and re-check it whenever you change power, antenna, or location.
Watch out Each individual choice is a legitimate method on its own, so picking just the OET Bulletin 65 calculation or just the measurement leaves out equally acceptable options the FCC recognizes.
Calculate, model, or measure: all three count. RF exposure evaluation has no single required method.
HamSandwich explanation, first draft. The question and answers are the NCVEC text.
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The rest of T0C

  1. T0C01 What type of radiation are radio signals?
  2. T0C02 Which of the following bands has the lowest maximum permissible exposure for RF safety?
  3. T0C03 How does the allowable power density for RF safety change if duty cycle changes from 100 percent to 50 percen…
  4. T0C04 What factors affect the RF exposure of people near an amateur station antenna?
  5. T0C05 Why do exposure limits vary with frequency?
  6. T0C06 Which of the following is an acceptable method to determine whether your station complies with FCC RF exposur…
  7. T0C07 What hazard is created by touching an antenna during a transmission?
  8. T0C08 Which of the following actions can reduce exposure to RF radiation?
  9. T0C09 How can you make sure your station stays in compliance with RF safety regulations?
  10. T0C10 Why is duty cycle one of the factors used to determine safe RF radiation exposure levels?
  11. T0C11 What is the definition of duty cycle during the averaging time for RF exposure?
  12. T0C12 How does RF radiation differ from ionizing radiation (radioactivity)?
  13. T0C13 Who is responsible for ensuring that no person is exposed to RF energy above the FCC exposure limits?
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