Using Signals to Code Data for Transmission Analog and Digital

Using Signals to Code Data for Transmission Analog and Digital

Length: 453 words (1.3 double-spaced pages)

Rating: Excellent

Open Document

Essay Preview

More ↓
Using Signals to Code Data for Transmission Analog and Digital

Analog signal

the public dial-up services support analogue signals. analogue signals
are what we encounter every day of our lifes. speech is an analogue
signal, and varies in amplitude(volume), frequency (pitch) and phase

[IMAGE]

Digital signals

Digital signals are the language of modern day computers. Digital
signals comprise only tow states. These are expressed as ON or OFF, 1
or 0 respectivally. examples of devices having TWO states in the home
are

· Light switches Either On or OFF

· Doors: Either OPEN or CLOSED

Simplex

Refers to transmission in only one direction. the difference between
simplex and half-duplex Half-duplex refers to two-way communications
where only one party can transmit at a time. Simplex refers to one-way
communications where one party is the transmitter and the other is the
receiver. An example of simplex communications is a simple radio,
which you can receive data from stations but can't transmit data.

Half duplex

Refers to the transmission of data in just one direction at a time.
For example, a walkie-talkie is a half-duplex device because only one
party can talk at a time. In contrast, a telephone is a full-duplex
device because both parties can talk simultaneously.

Most modem contain a switch that lets you select between half-duplex
and full-duplex. The correct choice depends on which program you are
using to transmit data through the modem.

In half-duplex mode, each character transmitted is immediately
displayed on your screen. (For this reason, it is sometimes called
local echo characters are echoed by the local. device. In full-duplex
mode, transmitted data is not displayed on your monitor until it has
been received and returned (remotely echoed) by the other device. If
you are running a communications program and every character appears
twice, it probably means that your modem is in half-duplex mode when
it should be in full-duplex mode, and every character is being both
locally and remotely echoed.

Full-duplex

How to Cite this Page

MLA Citation:
"Using Signals to Code Data for Transmission Analog and Digital." 123HelpMe.com. 20 Feb 2020
    <https://www.123helpme.com/view.asp?id=113379>.

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Analog and Digital Comparison Essay

- Analog and Digital Technologies To understand the technologies of analog and digital conversions we must first understand what analog and digital transmissions are. Analog transmissions are a continuous variable in amplitude and frequency. The frequency band that they operate over defines analog circuits. People generally produce a bandwidth of 9,900Hz with frequencies in the range of 100Hz to 10,000Hz. Speech that falls between 250Hz and 3,400Hz is considered intelligible speech and therefore the network circuits use bandwidth-limiting filters designed to filter out all frequencies above 4,000Hz....   [tags: Conversions, Transmissions, Amplitude, Frequency]

Research Papers
1188 words (3.4 pages)

Analog Vs Digital Essay

- Digital PCS: The Future of Wireless Phone Service In the past few years the use of mobile phones has increased tremendously. At one time only available to the rich and elite business executives, the luxury of mobile phones can now be used by a wide group of people in different financial situations. Mobile phones are a necessary convenience. They provide instant communication access wherever mobile phone service is offered. There are two options for mobile phone service: analog, and digital PCS....   [tags: essays research papers]

Research Papers
1123 words (3.2 pages)

Essay about The Transition from Analog Television to Digital Television

- The Transition from Analog Television to Digital Television The transition from analog television to digital television is an issue that is becoming more and more prevalent today. In 1996 the FCC (Federal Communications Commission) ruled that until 2006 or when digital television reaches 85 percent of all American households (whichever comes later) broadcasters can keep their analog spectrum free-of-charge. They decided that after that all television broadcasts must be made digital(Leopold). While this seemed like a great plan in 1996, it was later realized that it would take much longer for the transition to be complete due to many factors....   [tags: Expository Essays Research Papers]

Free Essays
1227 words (3.5 pages)

16QAM and Hexagonal 16QAM Optical Transmitter Using a Dual-Driven IQ Modulator Driven by 4 Binary Signals

- Thanks to the advances of digital signal processing, high-order modulation formats signals with coherent detection provide more spectrally efficient optical transmission systems. Dual polarization (DP) quadrature phase shift keying (QPSK) operating at 100 Gb/s with receiver digital signal processing (DSP) are now commercially available [1]. 16-ary quadrature amplitude modulation (16-QAM), doubling the spectral efficiency (SE) further to 4 bit/s/Hz [2], become the potential candidate for next generation optical transmission system beyond 100Gb/s per channel....   [tags: Information Technology ]

Research Papers
1201 words (3.4 pages)

The Development of Digital Music Essays

- Introduction According to Wikipedia, digital music is the “technology that can be used to record, store, generate, manipulate and reproduce sound using audio signals.” These are embedded in a digital form. Digital music has been developed since the 1970’s and has replaced analog studio technology greatly. Digital music has led to growth of music downloads because it is simpler for a music listener to download music straight away from sites like iTunes and Google Play, instead of going out to a shop to buy a hard copy like a cd....   [tags: downloads, mp3, piracy]

Research Papers
1294 words (3.7 pages)

Digital Audio Essay

- • Introduction Technology has paved a way for us to appreciate music in a more personal and convenient ways. Gone are the days that we need a huge investment, wide space and a stationary action for us to appreciate quality music: the CDs and walkmans that render us immobile, the lack of good earphone technology, and even the low-quality amplifiers have been gone. A more interesting part in the technology that incorporates sound and music, however, is on how studios and computers facilitate recording and compressing sound without compromising quality....   [tags: Technology ]

Research Papers
1127 words (3.2 pages)

Digital Electronics, Past, Present and Future Essay

- Background Information The age of digital electronics has come to be one of the most significant developments in the history of society. What were once manual time-consuming tasks and processes have now become programmed to the point where multi-tasking is an expected part of our lifestyles. So what is considered to be a digital electronic. They are sophisticated devices capable of sending information through electronic signals from point A to point B. The information is transmitted from one circuit to another by using electronic currents....   [tags: electronic circuits and devices]

Research Papers
1812 words (5.2 pages)

Digital Subscriber Line Is a Family of Technologies Essays

- 1. An introduction Digital subscriber line (DSL) technology transforms an ordinary telephone line into a broadband communications link, much like adding express lanes to an existing highway. DSL increases data transmission rates by a factor of twenty or more by sending signals in previously unused high frequencies. DSL technology has added a new twist to the utility of twisted-pair telephone lines. DSL is a family of technologies that provide Internet access by transmitting digital data over the wires of a local telephone network....   [tags: telephone, broadband, communication]

Research Papers
1645 words (4.7 pages)

Digital Television Essay

- Digital Television On November 1, 1998 computer companies, television makers, broadcasters, and program suppliers have made a transition from analog to digital television. When the FCC passed a law forcing the networks to change from an analog broadcast to a digital broadcast, all the above mentioned industries have been scrambling to get a jump on their competition. The picture and sound qualities of digital TV broadcasts are the best on Earth. However, at this moment cost remains a big problem....   [tags: essays research papers fc]

Free Essays
831 words (2.4 pages)

Cable Modems Vs. Digital Subscriber Essay

- The Internet has grabbed on to the world and it isn’t letting go. Nearly 36 million U.S. homes currently have PCs and everyone is dying to jump on the information superhighway. The Internet, which started as a group of government agencies and universities, has grown to include almost anyone, from home users to large companies and everyone in between. It makes sense then that providing Internet service is big business. The service which used to be dominated by groups of nerdy computer whizzes using equipment in someone’s basement is now being provided by many telephone companies, large on-line services and may soon be available from you local cable company....   [tags: essays research papers fc]

Free Essays
1973 words (5.6 pages)


Refers to the transmission of data in two directions simultaneously.
For example, a telephone is a full-duplex because both parties can
talk at once. In contrast, a walkie-talkie is a half-duplex device
because only one party can transmit at a time.

Most modem have a switch that lets you choose between full-duplex and
half-duplex modeml. The choice depends on which communications program
you are running.

In full-duplex mode, data you transmit does not appear on your
screenuntil it has been received and sent back by the other party.
This enables you to validate that the data has been accurately
transmitted. If your display screen shows two of each character, it
probably means that your modem is set to half-duplex mode when it
should be in full-duplex mode.

Transmission Media

Advantages of Twisted Pair Cable

· a high istalled base

· cheap to install

· easy to terminate

Its disadvantages are,

· very noisy

· limited in distance

· suffers from interference

advantages of Coaxial cable

· cheap to install

· conforms to standards

· it is widely used

· carry more conversations greater capacity than UTP

its disadvantages are

· limited to distance

· limited in number of connections

· terminations and connectors must be done properly
Return to 123HelpMe.com