As an experienced technician, you are responsible for Technical Support. A customer calls to ask the best signal level and noise level for cell phone. How to respond?
A.
-50dBm signal and -90dBm noise
B.
-20dBm signal and -90dBm noise
C.
-40dBm signal and -90dBm noise
D.
-30dBm signal and -90dBm noise
For a given noise level (-90dBm), signal to noise ratio will be maximum when the signal is at its highest level. Thus answer B, with highest signal level, seems correct.
I’ve never seen a cell phone with receive signal hotter than -65dBm.
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