Transmission methods

A bit (binary digit) is the smallest unit of information • N = 2n where N is the number of representations and n is the number of bits (ex. ASCII, Unicode, PCM code etc.) • Data communications transfer information using codes that are transmitted as signals (either analog or digital) • In general, analog lines provide a slow service that contains high error rates. However, digital lines cannot transmit analog data unless it is converted to a binary format first • Encoder is used to convert the information transmitted by the sender and decoder converts the information back to its original form for the receiver...