What power level does a receiver minimum discernible signal of -100 dBm represent?
100 microwatts
0.1 microwatt
0.001 microwatts
0.1 picowatts✓Correct answer
Explanation
The unit dBm is power referred to 1 milliwatt, so −100 dBm is ten decades below a milliwatt, that is, 10−10 mW. That equals 10−13 watt, which is 0.1 picowatt.