FCC Question Pool Review

Amateur Extra Class (Element 4) • 2024-2028

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Question E4C05

From subelement E4 - E4C

E4C05
Answer: B

What does a receiver noise floor of -174 dBm represent?

AThe receiver noise is 6 dB above the theoretical minimum
BThe theoretical noise in a 1 Hz bandwidth at the input of a perfect receiver at room temperature
CThe noise figure of a 1 Hz bandwidth receiver
DThe receiver noise is 3 dB above theoretical minimum