DONT USE CHAT GPT

$1.$ Distinguish between a signal element and a data element.

$2.$ Define baseline wandering and its effect on digital transmission.

$3.$ Define the characteristics of a self$-$synchronizing signal.

$4.$ Compare and contrast PCM and DM$.$

$5.$ Draw the graph of the NRZ$-$L scheme using each of the following data streams,

assuming that the last signa$11$evel has been positive. From the graphs, guess the

bandwidth for this scheme using the average number of changes in the signal level.

Compare your guess with the corresponding entry in Table $4\mathrm{.}1.$

a$.00000000$

b$.11111111$

c$.01010101$

d$.00110011$

aa$.$ Repeat Exercise $5$ for the NRZ$-$I scheme.

bb$.$ Repeat Exercise $5$ for the Manchester scheme.

cc$.$ Repeat Exercise $5$ for the differential Manchester scheme

$6.$ Find the $8-$bit data stream for each case depicted in Figure $4\mathrm{.}36($in the textbook.. $5$th edition has the better picture$)$

$7.$ What is the Nyquist sampling rate for each of the following signals?

a$.$ A low$-$pass signal with bandwidth of $200$ KHz$?$

b$.$ A band$-$pass signal with bandwidth of $200$ KHz if the lowest frequency is

$100$ KHz$?$

$8.$ We have sampled a low$-$pass signal with a bandwidth of $200$ KHz using $1024$ levels

of quantization.

a$.$ Calculate the bit rate of the digitized signal.

b$.$ Calculate the SNRdB for this signal.

c$.$ Calculate the PCM bandwidth of this signal.

$9.$ What is the maximum data rate of a channel with a bandwidth of $200$ KHz if we

use four levels of digital signaling.

$10.$ An analog signal has a bandwidth of $20$ KHz$.$ If we sample this signal and send it

through a $30$ Kbps channel what is the SNRdB$?$

$11.$ We have a baseband channel with a I$-$MHz bandwidth. What is the data rate for

this channel if we use one of the following line coding schemes?

a$.$ NRZ$-$L