digital & analog communication systems

A digital message is an ordered sequence of symbols selected from a finite set of discrete elements. Examples of digital messages are: (i) letters printed on this page (ii) listing of hourly temperature readings (iii) the keys you press at a computer terminal. Whether the messa..

What is the Difference Between Digital and Analog Signals? - A computer performs its tasks by turning on and off a series of electronic switches represented by the numerical digits of 0 and 1. A 0 is the code for off, and a 1 is the code for on. Combinations of these digita..

Advantages - The advantages associate with digital communication systems include (i) A common format for encoding different kinds of message signals (e.g., speech signal, video signal, computer data, etc.) for the purpose of transmission. (ii) An improved security of message. (iii) Increa..

Analog and Digital Communication - The concept of information is central to communication. There is no precise definition of the word "information". So, instead of information, we deal with "message". Message is defined as the physical manifestation of information as produced by the sourc..

The concept of information is central to communication. There is no precise definition of the word "information". So, instead of information, we deal with "message..

A number consists of three digits. The digit in the tens place is 1 less than twice the digit in units place and the digit in the hundreds place is 1 more than twice the digit in units place. The product of the digits is 30. Find the numbe..

The square of the unit digit of a two digit number equals the number itself. Find the number if the unit digit is 1 more than the double of its tens digit. => 36 or 37 or 25 or 24..

Identify the seven-digit number that has the digit 2 in the million's place and the digit 4 in the hundred's place, with each of the remaining digits being 3. => 3,233,433 or 2,333,343 or 3,234,333 or 2,333,433..

Which numeral has the digit 7 in the millions place? => 721,061,007 or 122,007,007 or 271,986,000 or 127,006,000..

Identify the three-digit number that has the digit 7 in the ones place, with each of the remaining digits being 1. => 177 or 111 or 1777 or 117..