The scattering parameters of a certain two-port network is measured to be 0.3 0.6 using 50 ohms measurement system. [s] = M 0.2 a) Find equivalent impedance (Z) parameters for this network. b) What would be the scattering matrix if 100 ohms measurement system is used? You can convert impedance matrix back to scattering matrix using 100 ohms as the reference impedance.

4.a. What's the typically acceptable maximum BER value in a multimode fiber?A. 10–7B. 10–6C. 10–9D. 10–84.b. What does a positive dBm value from a power meter tell you?A. The signal strength is less than 1 mW.B. The signal strength is greater than 1 mW.C. The signal strength is greater than 1 W.D. The signal strength is less than 1 W.

a) The Channel is a key component to consider in all communications systems. Give two examples of a channel commonly used in communications systems, and for each, the key properties that can impact transmission. Compare twisted-pair and fibre-optic wired channels. Explain how the use of differential signals can be used to improve the signal to noise ratio in a twisted pair channel. i) ii)

Discuss the differences between noise channel and noiseless channel including the formula for each?