An RF system is defined as follows. Link budget: -60 dBM Receive sensitivity: -80 dBM Fade margin: 25 dB Is this system reliable? O True O False
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-80 dBm (Receive sensitivity) + 25 dB (Fade margin) = -55 dBm Show more…
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You need to transmit data over an optical link of 100km with fibre loss of 0.2 dB/Km. The link has five splices with 0.05 dB loss per splice and two connectors with 0.2 dB per connector. The receiver sensitivity is 20 µW. Express the minimum transmitter power in both mW and dBm. Note: You can express the loss budget of the system (in dB) using Ptr,dBm - Prec,dBm = - γL + Lfixed, where Lfixed represents the fixed losses in the system (i.e losses that do not depend on fibre length). Also γ = - 0.2 dB/km < 0 for loss. Prec,dBm is the receiver sensitivity in dBm. Ptr,dBm is the transmitter power in dBm.
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