Suggest two functions of the copper braid.
Suggest one application of a coaxial cable for the transmission of electrical signals.
The cable has a constant noise power of $7.6\,\mu\text{W}$. The smallest acceptable signal-to-noise ratio is $32\,\text{dB}$. Calculate the minimum acceptable signal power $P_{\text{MIN}}$ in the cable.
The signal enters the transmission cable with power $2.6\,\text{W}$. The cable has an attenuation per unit length of $6.3\,\text{dB km}^{-1}$. Use your answer in (i) to find the maximum uninterrupted cable length $L$ over which the signal can travel.
The signal enters the transmission cable with power $2.6\,\text{W}$. The cable has an attenuation per unit length of $6.3\,\text{dB km}^{-1}$. Use your answer in part (i) to find the maximum uninterrupted cable length $L$ over which the signal can travel.