What measurement is specified by FCC rules that regulate maximum power?
The correct answer is D: PEP output from the transmitter. The measurement specified by FCC rules that regulate maximum power is PEP output from the transmitter. PEP (Peak Envelope Power) is the maximum power during the modulation envelope. For amateur radio operators, this is the standard power measurement for most modes. Understanding this helps ensure accurate power measurement and legal operation. PEP is measured at the transmitter output, not at the antenna or as RMS.
Exam Tip
FCC power regulation = PEP output from transmitter. Think 'P'EP 'O'utput = 'P'ower 'O'fficial measurement. Peak Envelope Power measured at transmitter output is the FCC standard. Not RMS, not at antenna - PEP at transmitter output.
Memory Aid
"FCC power regulation = PEP output from transmitter. Think 'P'EP 'O'utput = 'P'ower 'O'fficial. Peak Envelope Power measured at transmitter output is the FCC standard for power regulation. Not RMS, not at antenna."
Real-World Application
You measure your transmitter's output power. You use a PEP meter connected at the transmitter output and measure 500 watts PEP. This is the power that FCC regulations are based on - PEP output from the transmitter. You don't measure at the antenna or use RMS - PEP at the transmitter is the standard.
Key Concepts
Why Other Options Are Wrong
Option A (RMS output): Incorrect. RMS (Root Mean Square) isn't the FCC standard for power regulation - PEP is the standard measurement for most amateur operations.
Option B (RMS input to antenna): Incorrect. Power isn't measured at the antenna input - it's measured at the transmitter output. Also, RMS isn't the standard.
Option C (PEP input to antenna): Incorrect. Power is measured at the transmitter output, not at the antenna input. The measurement point is the transmitter, not the antenna.
题目解析
The correct answer is D: PEP output from the transmitter. The measurement specified by FCC rules that regulate maximum power is PEP output from the transmitter. PEP (Peak Envelope Power) is the maximum power during the modulation envelope. For amateur radio operators, this is the standard power measurement for most modes. Understanding this helps ensure accurate power measurement and legal operation. PEP is measured at the transmitter output, not at the antenna or as RMS.
考试技巧
FCC power regulation = PEP output from transmitter. Think 'P'EP 'O'utput = 'P'ower 'O'fficial measurement. Peak Envelope Power measured at transmitter output is the FCC standard. Not RMS, not at antenna - PEP at transmitter output.
记忆口诀
FCC power regulation = PEP output from transmitter. Think 'P'EP 'O'utput = 'P'ower 'O'fficial. Peak Envelope Power measured at transmitter output is the FCC standard for power regulation. Not RMS, not at antenna.
实际应用示例
You measure your transmitter's output power. You use a PEP meter connected at the transmitter output and measure 500 watts PEP. This is the power that FCC regulations are based on - PEP output from the transmitter. You don't measure at the antenna or use RMS - PEP at the transmitter is the standard.
错误选项分析
Option A (RMS output): Incorrect. RMS (Root Mean Square) isn't the FCC standard for power regulation - PEP is the standard measurement for most amateur operations. Option B (RMS input to antenna): Incorrect. Power isn't measured at the antenna input - it's measured at the transmitter output. Also, RMS isn't the standard. Option C (PEP input to antenna): Incorrect. Power is measured at the transmitter output, not at the antenna input. The measurement point is the transmitter, not the antenna.
知识点
PEP output, Power measurement, FCC power regulations, Transmitter power
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.