Frequency and bandwidth, Basic Computer Science

Frequency and Bandwidth:

Let us try to understand a little about how information is transmitted. The information may be in the form of sound (human voice, music) or it may be visual (printed page, microfilm, video picture) or it may be digital data. Whatever may be the form, it must be converted to electrical signals (electromagnetic waves) before it can be transmitted over a given medium. Such signals very often cannot be sent over a channel as they are, but must be modulated in some way to fit them into the carrying medium. The frequencies of the electromagnetic waves are normally radio frequendies which range from low frequencies capable of carrying only small amounts of information to millimeter waves, which can carry very large amounts. Above the radio frequencies lies light frequency, which can be modulated to carry even larger amounts of information. In other words, the amount of information that can be sent over a given channel in a given time is dependent on the bandwidth. The bandwidth available increases with increasing carrier frequency. Thus, generally speaking the wider the bandwidth, the larger the amount of information which can be carried and the faster its speed. 

Posted Date: 10/24/2012 4:59:58 AM | Location : United States







Related Discussions:- Frequency and bandwidth, Assignment Help, Ask Question on Frequency and bandwidth, Get Answer, Expert's Help, Frequency and bandwidth Discussions

Write discussion on Frequency and bandwidth
Your posts are moderated
Related Questions

Web Browser:   A Web browser is software application that enables you to find, retrieve, and display information available on the World Wide Web (WWW). Browser also allows you

wrap that computes a customer water bill. The bill include Rs.100 water demand charge + a consumption charge of Rs.1.5 for every thousand gallons used. Consumption is figured from

Basic steps/tasks involved in spreadsheets development

Question Write the steps for applying animations. Prepare a presentation of 5 slides in a creative for any topic in your semester (research methods/Business strategy/Financial

Question 1 List and explain the ways used to close an MS Word document Question 2 What is MS-Excel? List the steps involved in starting Microsoft Excel Question 3 What i

What is CAI? Explain its pitfalls

Each Many to Many relationship type maps into the Table. The primary key of this relevant is the combination of the primary keys of the participating entity types. These are also c

difference between a compiler and a translator

what are daily uses of twisted pair cable in network