18. A receiver detects a signal with a power level of -30 dBm. What is the RMS voltage of this detected signal? Assume a load resistance of 60 Ω. Handwritten Calculation required.
a) 7.75 V
b) 7.75 mV
c) 245 mV
d) None of the above.
c) 245 mV
Handwritten Calculation:
P = -30 dBm = 0.001 mW
Vrms = sqrt(P*R) = sqrt(0.001*60) = 245 mV