2 &3

An analogue signal with a bandwidth of 5 kHz is to be sampled at twice the Nyquist rate and then transmitted over a line in a digital PCM format. Determine the bit rate of the required PCM signal if the SNRquant is to be at least 60dB and the minimum number of bits per sample is used. i) For ii) how many bits per signal element must be transmitted if the available bandwidth is 12.5kHz? Under what line condition would it be theoretically feasible to transmit that number of bits on the available bandwidth? Do you think it would work in practice and if soot why? Ignoring switching delay determine the maximum possible data throughput when HDLC is used to transmit 1024 bit frames with 3 bit sequence numbers and a 16 bit FCS across a 1Mbps data rate link with a propagation delay of 270ms? 3 2