HPE6-A85 · Question #74

An AP signal strength of .0000001 milliwatts equals how many dBm?

The correct answer is D. -80 dBm. An AP signal strength of .0000001 milliwatts is equivalent to -80 dBm. The dBm scale is logarithmic, with every 10 dBm representing a tenfold increase or decrease in power. A signal strength of 1 milliwatt (mW) is 0 dBm, so a signal strength of .0000001 mW is 80 decibels less…

Fundamentals of Campus Access Networking

Question

Options

A-90 dBm
B-60 dBm
C-70 dBm
D-80 dBm

How the community answered

(55 responses)

A
16% (9)
B
4% (2)
C
7% (4)
D
73% (40)

Explanation

An AP signal strength of .0000001 milliwatts is equivalent to -80 dBm. The dBm scale is logarithmic, with every 10 dBm representing a tenfold increase or decrease in power. A signal strength of 1 milliwatt (mW) is 0 dBm, so a signal strength of .0000001 mW is 80 decibels less than 1 mW, which is -80 dBm.

Topics

#dBm#signal strength#RF power calculation#milliwatts

Community Discussion

No community discussion yet for this question.

Full HPE6-A85 Practice