The thermal noise is at -174 dBm/Hz. A spectrum analyzer has a resolution bandwidth of 1 kHz and a 5 dB noise figure. What is the level of the noise floor?

The correct answer is B. -139 dBm. See the full explanation below for the reasoning.

Question

Options

A-174 dBm
B-139 dBm
C-144 dBm
D-204 dBm

How the community answered

(47 responses)

A
4% (2)
B
74% (35)
C
13% (6)
D
9% (4)

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