What Are Error Correction Memory Codes?

!±8± What Are Error Correction Memory Codes?

Error correcting memory codes or we can say error checking and correction memory codes are those codes which allow data being read and transmitted to be tested for errors. It is different from parity checking and controlling because in this errors are not only assessed but also corrected after detection. When data rate increases such error correcting memory codes are specifically designed in the form of data storage and transmitting hardware.

Following is the manner in which error correction memory works:

• When any data unit or any unit is stored in memory RAM or in peripheral storage then calculation is made of the code which describes the sequence of the bit in the word or unit. After this it is stored in the particular unit of data. For every 64 bits unit, an additional amount of 7 bits is needed for storage of this code.
• When a request is made to the unit for reading it, calculation is repeated by using the constant algorithm for the code in the storage and the about to read unit. The code which is generated newly is then compared with the initial code as generated in first step.
• In the next step we analyze as to whether the new code matches the old one or not. If it successfully matches then the code is free of errors.
• If new code does not match the old one then the bits which are missing are detected through comparison of code and the bits supplied for the purpose of correction.
• The data which is in storage is not touched for any correction. It is overlaid by the data generated eventually and with assumption of having errors as transient the bits which are incorrect will fade away.
• But even if the error repeats by turning off the computer again and again then it definitely indicates a permanent nature of error in the hardware of the system because error cannot recur at constant places of storage. In such cases message is communicated to the log or to the administrator of the system in which indication is given regarding the location of recurrent errors.
• Error correction memory codes are required in addition at levels of 64 bits and parity checking also requires the same but in reality correction memory code has the advantage of increasing the computation reliability and that of telecommunication system or a part of it without incurring high costs.

What Are Error Correction Memory Codes?

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What Can an A3 Printer Scanner Do?

!±8± What Can an A3 Printer Scanner Do?

If you're a technological savvy, then you will not even think twice about what this equipment can do. However, for the benefit of the technologically challenged, we will focus on what this machine can basically do. An A3 printer and scanner is basically a multifunctional device that allows you to print and scan. However, like most multifunctional gadgets, they have additional features that come along with it. Some of them may be wireless connectivity or facsimile capability.

So let's start with the most basic function of an A3 printer scanner. A printer and scanner for A3 can print documents to a maximum of A3 sizes. If you're not familiar with this size, an A3 size has dimensions of 17" x 11". Most printers are capable of printing up to Legal sizes, which measures 14" x 11". Do not be misled though. A3 printers can print on A3 sizes as well as smaller sizes. So if you're worried that you are only able to print on A3 sizes, there is no need to worry. Most A3 printers are capable of printing on smaller sizes such as Letter and Legal sizes. Some even have the option to print on envelopes and other media.

Let's proceed to the next basic function of an A3 printer scanner. This equipment is able to scan documents at 17" x 11" sizes. Most scanners work by using computer software that comes along with it. Assuming that the software is running, the document is faced down on the flatbed scanner and is enclosed with a lid. When it starts scanning, it flashes a light along the document. When it's done, the computer pops up a window asking how the image will be saved. Before, scanners automatically generate JPG images on the specified directory. Scanners today have other saving options such as format and directory.

Both scanning and printing functions go hand in hand in such a way that it generates another function, copying. Some printer scanners have the option to print it directly so it can work similar to a photocopier. The great thing about it is that they can also process colored documents. Since what we have been discussing so far is an A3 printer scanner, it is only logical to say that you have the added capability of photocopying A3 size documents.

If the document you are scanning is a portrait type, assuming that you have a very large document that rotating it will exceed in one dimension, then just scan it at any orientation that will allow the document to fit. You can use image-editing software to fix the orientation. Most image editing programs have the capability to rotate, crop or even re-size images.

Now that we've tackled most of what an A3 printer scanner can do, we've basically tackled what most printer scanners can do. These however are only the basic functions. There are some printer scanners that have other special features. Some can be used even without a computer. There are printer scanners where you just pop in a USB flash drive and you can set the scanner to save it directly on the USB flash drive. This is only an example of what the coming models will be.

What Can an A3 Printer Scanner Do?

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With the Canon PIXMA MX310, this is true high-performance versatility. You'll quickly print photos with color resolution up to 4800 x 1200 color dpi; a borderless 4 x 6" photo takes only about 46 seconds. The Automatic Document Feeder (ADF) holds up to 30 originals, so it's much easier to copy, scan or fax large documents. Copies will be remarkably true to the originals, and documents will feature bold, laser-quality text. FeaturesPrecision ink nozzles create high resolution photos up to 4800 x 1200 color dpi Microscopic 2 picoliter sized ink droplets produce finely detailed photos Produce impressive scans up to 1200 x 2400 dpi with vibrant 48 bit color depth Auto Image Fix: Features Easy PhotoPrint EX to help you produce amazing results on all your photos Print Speed: Up to 4x6" borderless photo as fast as 46 secondsUp to 22ppm black as fast as 2.7 seconds per pageUp to 17ppm color as fast as 3.5 seconds per page Print Resolution: Up to 600 x 600 dpi blackUp to 4800 x 1200 dpi colorCopy Speed: Up to 22cpm black as fast as 2.7 seconds per pageUp to 17cpm color as fast as 3.5 seconds per page Scanner Max Resolutions: Optical 1200 x 2400 dpi, Interpolated 19,200 x 19,200 dpi 8.5x11.7" Max Document Size 20 Locations Speed Dialing Fax Modem Speed 33.6 Kbps Super G3 color fax: Black 3 seconds per page, Color 1 minute per page Print Wirelessly right from your PictBridge enabled mobile camera phone Quick Start: Powering up your printer is now much faster Paper Sizes: Credit Card, 4x6", 4x8", 5x7", 8x10", Letter, Legal, U.S. number 10 envelopes and Photo Stickers Compatibility: Windows Vista, Windows XP, 2000 and Mac OS X v.10.2.8 to 10.4.x Dimension: 18.4"L x 17.3"W x 9.1"H Weight: 19 lbs

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