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
In this problem we will compare the performance of a vector processor with a system that contains a scalar processor and a GPU-based coprocessor. In the hybrid system, the host pr

I need to create mulitple queues assignment that run concurrently. It is like a queue simulation with  number of checkouts with a random probability of clients, joining any one

Need help with javascript sb.append questions

Question 1 What is fabric login and what are its functions Question 2 Explain how is IP SAN different from SAN Question 3 Discuss the product related to Fibre Channel Questio

Laser Printers: These printers can print a whole page at one command, offer highest quality and can combine text, graphics, etc. They are generally restricted to A4 paper and

#que411stion..

Question 1 What is IT auditing? Discuss the three phases involved in the IT auditing Question 2 List and explain the two types of load balancing methods Question 3

ATM Theory - Unspecified Bit Rate Is intended for non-real time applications, that is, those not requiring tightly constrained delay and delay variation. Examples of applications

What is CAI? Explain its pitfalls.

Data buses: The availability of reliable digital semi-conductor technology has enabled the inter-communication task between different equipment to be significantly improved. P