Question

What level, in dBm, is usually considered to be about the minimum useful signal level?

a. -110 dBm
b. -90 dBm
C. -70 dBm
d. -80 dBm

Answer 1

The answer to what is usually considered the minimum useful signal level is -90 dBm. This level is where a signal can still be detected and processed by most receivers.

Step-by-step explanation:

The minimum useful signal level is usually considered to be about -90 dBm. This is the level at which a signal can typically be usefully detected and processed by a receiver in a communication system.

Signal levels weaker than this may not be discernible from the background noise, or may require more sophisticated processing to extract useful information. It is important to note that this value can vary depending on specific applications and the sensitivity of the receiver.