CD and DVD Drives

Demodulation is the act of removing the modulation from an analog signal to get the original baseband signal back. Demodulating is necessary because the receiver system receives a modulated signal with specific characteristics, which must be returned to base-band. There are several ways of demodulation depending on what parameters of the base-band signal are transmitted in the carrier signal, such as amplitude, frequency or phase. For example, for a signal modulated with a linear modulation, like AM (Amplitude Modulated), we can use a synchronous detector. On the other hand, for a signal modulated with an angular modulation, we must use an FM (Frequency Modulated) demodulator or a PM (Phase Modulated) demodulator. Different kinds of circuits perform these functions. A demodulator is an electronic circuit used to recover the information content from the carrier wave of a signal.[1] The term is traditionally used in connection with radio receivers, but many other systems use many kinds of demodulators. Another common one is in a modem, which is a contraction of the terms modulator/demodulator. Many techniques -- such as carrier recovery, clock recovery, bit slip, frame synchronization, rake receiver, pulse compression, Received Signal Strength Indication, error detection and correction, etc. -- are only performed by demodulators, although any specific demodulator may perform only some or none of these techniques.

Magnets have magnetic fields that attract items containing iron. Some of the substances attracted to magnets include iron, nickel, and steel. To understand a magnet you must first understand the magnetic field. A magnetic field is created as the result of moving charges such as electrons. A magnet's magnetic field either attracts or repels certain metals, as well as other magnets. A magnet has two ends that are referred to as poles. One pole is called north and the other one is referred to as south. To attract magnets to each other, you have to place opposite ends of two magnets near each other. Placing like ends of two magnets near each other causes the opposite to occur; the two magnets repel each other. A magnet is any object that has a magnetic field. It attracts ferrous objects like pieces of iron, steel, nickel and cobalt. In the early days, the Greeks observed that the naturally occurring 'lodestone' attracted iron pieces. From that day onwards began the journey into the discovery of magnets. These days magnets are made artificially in various shapes and sizes depending on their use. One of the most common magnets - the bar magnet - is a long, rectangular bar of uniform cross-section that attracts pieces of ferrous objects. The magnetic compass needle is also commonly used. The compass needle is a tiny magnet which is free to move horizontally on a pivot. One end of the compass needle points in the North direction and the other end points in the South direction. The end of a freely pivoted magnet will always point in the North-South direction. The end that points in the North is called the North Pole of the magnet and the end that points South is called the South Pole of the magnet. It has been proven by experiments that like magnetic poles repel each other whereas unlike poles attract each other. What is a magnetic field? The space surrounding a magnet, in which magnetic force is exerted, is called a magnetic field. If a bar magnet is placed in such a field, it will experience magnetic forces. However, the field will continue to exist even if the magnet is removed. The direction of magnetic field at a point is the direction of the resultant force acting on a hypothetical North Pole placed at that point. When current flows in a wire, a magnetic field is created around the wire. From this it has been inferred that magnetic fields are produced by the motion of electrical charges. A magnetic field of a bar magnet thus results from the motion of negatively charged electrons in the magnet. Just as an electric field is described by drawing the electric lines of force, in the same way, a magnetic field is described by drawing the magnetic lines of force. When a small north magnetic pole is placed in the magnetic field created by a magnet, it will experience a force. And if the North Pole is free, it will move under the influence of magnetic field. The path traced by a North magnetic pole free to move under the influence of a magnetic field is called a magnetic line of force. In other words, the magnetic lines of force are the lines drawn in a magnetic field along which a north magnetic pole would move. The direction of a magnetic line of force at any point gives the direction of the magnetic force on a north pole placed at that point. Since the direction of magnetic line of force is the direction of force on a North Pole, so the magnetic lines of force always begin on the N-pole of a magnet and end on the S-pole of the magnet. A small magnetic compass when moved along a line of force always sets itself along the line tangential to it. So, a line drawn from the South Pole of the compass to its North Pole indicates the direction of the magnetic field. # The magnetic lines of force originate from the North Pole of a magnet and end at its South Pole. # The magnetic lines of force come closer to one another near the poles of a magnet but they are widely separated at other places. # The magnetic lines of force do not intersect (or cross) one another. # When a magnetic compass is placed at different points on a magnetic line of force, it aligns itself along the tangent to the line of force at that point. These are just some of the basic concepts of magnetism. One cannot possibly grasp the depth and appreciate the versatility of magnets without reading more about the uses of magnets, the Earth as a huge magnet and electromagnetism among other things.

A standard DVD typically consists of two layers for storing data, one on each side of the disc. Dual-layer DVDs can have up to four layers, two on each side, to increase storage capacity.

Gary, If you do this you are going to toast your CD player. I suppose you are thinking because the VA that it will be ok. It won't.

Your CD is not desinged to handle the higher voltage . This is really no different that taking a 120 volt microwave and trying to plug it into 240 volt source; and I know you wouldn't want to do that. The only difference here is amps for household stuff and milliamps for your electronics. Same result though; you get to go and get a new one.

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Andy

The earliest records of any form of astrology are those of the Babylonians, in or around the second millennium BCE. Some claim the Sumerians also had it a millennium earlier, but there is no evidence to support this.

"CD" is capitalized because it is an abbreviation for "compact disc", but "compact disc" is a common noun so would not be capitalized.

No normally the DVD player will just say that it can not read the disk. If the disk is damaged, dirty, wet, or even broken in places then it can damaged the laser and other equipment.

Most new DVD players can read pretty damaged disks.

Damaged as in scratches, smudges, and other small disfigures.

It being dirty probably isn't much of an issue unless its absolutely covered in dust, has chemicals on it, or has other things that you probably should not put on it.

Apparently not..i have read every where that none of the seasons are on DVD yet.
I really hope they do soon, though...

The cost of DVDs can vary depending on the title, age, condition, and where you purchase them. On average, new DVDs can range from $10 to $20, while used DVDs can be found for as low as $1 to $5. Special edition or rare DVDs may cost more.

The CD drives uses a mechanism that slows down the disc when the laser beam is near the center of the disc and speeds up the disc when the laser beam is near the outer edge.

He was 19

Theoretically, you could remove the entire VHS mechanism and insert a DVD player, but the cost would probably be prohibitive. I bought a refurbished LCD tv with a built-in DVD player for under $100, and I'm sure that the conversion you are talking about would be far more than that.

First and foremost, piracy should be banned anywhere. Not only are they destroying the business in show business, they are also destroying the economy by not paying proper taxes. Being pirated, it is a guarantee that a copy of a pirated dvd video is not good. People should not buy pirated products.

depends on the BIOS and the Hardirves. Some older IDE drives have a switch or a jumper on them that u can select Master or Slave. Some computer you can change this in the BIOS. Master being the controller and slave being the controlled

No.

An average CD can hold 700 MB of data.

all you need to do is put toothpaste on it leave it for 5 minutes thn wash it off and your finished

Not necessarily. You can have a CD/DVD reading drive that does not write.

because your hair is dry and bubblegum is is sticky

No. One Nintendo 64 cartridge is about the size of a DS.

No, You can only pause Zune movies. I wish they made it so you can pause regular movies but you cant

Well, you need to burn downloaded videos to DVD. All you need is DVD burning software. I myself use one called Aimersoft DVD Creator (perfectly compatible with AVI), highly recommended. How to? Well, firstly, you need to download Aimersoft DVD Creator and launch it. Secondly, import your downloaded movies to the software. Thirdly, edit movies, organize your slideshow. (Optional). And then, click Burn tab to start your burning. It takes one or two hours. It's pretty simple. Good luck. Download at: http://www.dvd-creator.org/dvd-creator/

no it was in no way able to play dvds which is part of the reason its competition tookover it started out against ps1 n64 so dvds didn't really matter then the ps2 came out and was the cheapest dvd player around and it played games