Q. 75 A 1 mW video signal having a bandwidth of 100 MHz is transmitted to a receiver through cable that has 40 dB loss. If the effective one-side noise spectral density at the receiver is 
Watt/Hz, then the signal-to-noise ratio at the receiver is
(A) 50 dB
(B) 30 dB
(C) 40 dB
(D) 60 dB
Answer: (A)
Explanation:
