What is the maximum peak envelope power output for Technician class operators in their HF band segments?
The correct answer is A: 200 watts. According to FCC Part 97.313, Technician class operators are limited to a maximum peak envelope power (PEP) output of 200 watts when operating in their HF band segments. This power limit applies to the HF privileges that Technicians have, primarily on the 10-meter band.
Peak envelope power (PEP) is the average power during one RF cycle at the peak of the modulation envelope. For SSB transmissions, PEP is higher than average power because it represents the peak power during modulation. The 200-watt limit for Technicians on HF is a reasonable power level that allows effective communications while maintaining reasonable equipment costs and RF safety considerations. This limit applies specifically to HF operations; different limits apply to VHF/UHF frequencies.
Exam Tip
Technician HF power = 200 watts PEP. Remember: Technicians can use up to 200 watts PEP on HF bands. This is a specific number to memorize.
Memory Aid
"**T**echnician **H**F = **T**wo **H**undred watts (think 'TH = 200')"
Real-World Application
You're a Technician licensee operating SSB on 28.400 MHz (10-meter phone segment). Your transceiver is capable of 100 watts output, which is well within your 200-watt PEP limit. When you modulate with voice, your PEP might reach 150 watts, still safely under the 200-watt maximum. This power level is sufficient for good contacts while staying within FCC regulations.
FCC Part 97.313Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. 100 watts is not the limit for Technician HF operations. The limit is 200 watts PEP.
Option C: Incorrect. 50 watts is too low. Technician operators can use up to 200 watts PEP on HF.
Option D: Incorrect. 10 watts is far below the allowed limit. Technician operators have a 200-watt PEP limit on HF.
题目解析
The correct answer is A: 200 watts. According to FCC Part 97.313, Technician class operators are limited to a maximum peak envelope power (PEP) output of 200 watts when operating in their HF band segments. This power limit applies to the HF privileges that Technicians have, primarily on the 10-meter band. Peak envelope power (PEP) is the average power during one RF cycle at the peak of the modulation envelope. For SSB transmissions, PEP is higher than average power because it represents the peak power during modulation. The 200-watt limit for Technicians on HF is a reasonable power level that allows effective communications while maintaining reasonable equipment costs and RF safety considerations. This limit applies specifically to HF operations; different limits apply to VHF/UHF frequencies.
考试技巧
Technician HF power = 200 watts PEP. Remember: Technicians can use up to 200 watts PEP on HF bands. This is a specific number to memorize.
记忆口诀
**T**echnician **H**F = **T**wo **H**undred watts (think 'TH = 200')
实际应用示例
You're a Technician licensee operating SSB on 28.400 MHz (10-meter phone segment). Your transceiver is capable of 100 watts output, which is well within your 200-watt PEP limit. When you modulate with voice, your PEP might reach 150 watts, still safely under the 200-watt maximum. This power level is sufficient for good contacts while staying within FCC regulations.
错误选项分析
Option B: Incorrect. 100 watts is not the limit for Technician HF operations. The limit is 200 watts PEP. Option C: Incorrect. 50 watts is too low. Technician operators can use up to 200 watts PEP on HF. Option D: Incorrect. 10 watts is far below the allowed limit. Technician operators have a 200-watt PEP limit on HF.
知识点
FCC Part 97.313, Peak envelope power, PEP, Technician HF power limit
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.