When must an RF exposure evaluation be performed on an amateur station operating on 80 meters?
The correct answer is A: An evaluation must always be performed. When operating an amateur station on 80 meters, an RF exposure evaluation must always be performed. There are no automatic exemptions for 80-meter operation.
FCC rules require RF exposure evaluation for amateur stations, and 80-meter operation is not exempt. Even low-power 80-meter stations require evaluation, though the evaluation may show that exposure is below limits and no mitigation is needed. The evaluation is required to determine whether MPE limits are exceeded and what mitigation (if any) is needed. There's no blanket exemption for 80 meters based on power level, mode, or other factors. The evaluation must be performed, though it may conclude that no action is needed if exposure is below limits.
Exam Tip
80m RF exposure = Evaluation always required. Remember: An RF exposure evaluation must always be performed for amateur stations operating on 80 meters. There are no automatic exemptions, though the evaluation may show no mitigation is needed.
Memory Aid
"**8**0m **R**F **E**xposure = **A**lways **E**valuate (think '80mRE = AE')"
Real-World Application
You operate a 50-watt 80-meter station. You must perform an RF exposure evaluation. You calculate the exposure levels and find they're well below MPE limits, so no mitigation is needed. But you still had to do the evaluation - it's always required. The evaluation shows you're compliant, but you can't skip the evaluation step.
FCC Part 97.13Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. There's no exemption for stations with ERP less than 10 watts. An evaluation is still required, though it may show exposure is below limits.
Option C: Incorrect. There's no exemption for CW mode. All modes require evaluation.
Option D: Incorrect. There's no exemption for stations with less than 100 watts output. An evaluation is always required.
题目解析
The correct answer is A: An evaluation must always be performed. When operating an amateur station on 80 meters, an RF exposure evaluation must always be performed. There are no automatic exemptions for 80-meter operation. FCC rules require RF exposure evaluation for amateur stations, and 80-meter operation is not exempt. Even low-power 80-meter stations require evaluation, though the evaluation may show that exposure is below limits and no mitigation is needed. The evaluation is required to determine whether MPE limits are exceeded and what mitigation (if any) is needed. There's no blanket exemption for 80 meters based on power level, mode, or other factors. The evaluation must be performed, though it may conclude that no action is needed if exposure is below limits.
考试技巧
80m RF exposure = Evaluation always required. Remember: An RF exposure evaluation must always be performed for amateur stations operating on 80 meters. There are no automatic exemptions, though the evaluation may show no mitigation is needed.
记忆口诀
**8**0m **R**F **E**xposure = **A**lways **E**valuate (think '80mRE = AE')
实际应用示例
You operate a 50-watt 80-meter station. You must perform an RF exposure evaluation. You calculate the exposure levels and find they're well below MPE limits, so no mitigation is needed. But you still had to do the evaluation - it's always required. The evaluation shows you're compliant, but you can't skip the evaluation step.
错误选项分析
Option B: Incorrect. There's no exemption for stations with ERP less than 10 watts. An evaluation is still required, though it may show exposure is below limits. Option C: Incorrect. There's no exemption for CW mode. All modes require evaluation. Option D: Incorrect. There's no exemption for stations with less than 100 watts output. An evaluation is always required.
知识点
RF exposure evaluation, 80 meters, Always required, MPE evaluation
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.