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reason for this is that the more dots that can be placed in the same area (in this case, one
square inch), the smoother and more detailed the overall image will look.
On the other hand, the higher its resolution, the longer the scanner takes to scan the
image, and the larger the resulting image's data file will be (more dots equals more
information; more information equals a larger file). Typical flatbed scanners range from
300 dpi to more than 3,200 dpi; The most affordable resolution for the average consumer
is 1,200-1,600 dpi.
System Requirements
Before you buy or try to install a scanner, make sure that your computer can actually run
it. Scanners can really stretch the limits of a mid-range PC--and may not work at all on
low-end ones. Carefully review the manufacturer's stated system requirements and verify
that your system has at least the minimum amount of RAM, CPU speed, and hard drive
space listed. For best results, exceed the minimum requirements by as much as possible.
Most manufacturers require nothing less than a 486/33 processor (if you have a Pentium
or better, you should be safe). Most experts recommend a minimum of 16-24M of RAM
even if the manufacturer claims less.
Connecting a Scanner to Your PC
Like all peripheral devices, your scanner must be connected to your computer in some
way. Most likely, your scanner came with all the equipment required to hook it up.
SCSI Cards and Cables
The vast majority of flatbed and sheetfed scanners use SCSI (Small Computer System
Interface, pronounced "skuzzy") connections. If you're lucky, your computer already has
a SCSI card installed and all you'll have to do is connect the provided cable to the SCSI
port at the back of your computer. But most computers don't come that way, so you might
need to open the system case and install a new card in one of your computer's expansion
slots. If so, follow the instructions that came with the scanner, and check your computer
system's manual to make sure you're installing it in the right place. See Chapter 27,
"Upgrading Your Hardware," for details on how to install add-in cards.
The great thing about SCSI devices is that one SCSI card can support up to seven
different devices connected together in a "SCSI chain." You might, for example, have a
scanner plugged into the SCSI port, a Jaz drive connected to the scanner, an external hard
drive connected to the Jaz drive, and a CD-ROM drive connected to the external hard
drive. Not only does this give you more flexibility in configuring your system, it also
saves the few expansion ports in your computer for other devices that aren't able to share.
TWAIN Drivers
Every hardware device, whether internal or external, requires a software program called a
driver to help it communicate with your computer's operating system. For scanners, the
standard driver type is a TWAIN driver (supposedly, TWAIN stands for Technology
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Earn Money
Trading Forex Online
Paramount Airways
Free Data Recovery
Cargo
Job Portal
HSBC Investment
Management
Cheap Web Hosting
Make Trip
Cheap Air Travel
Leisure Hotel
Free Air Travel
Mutual Fund Informations
Cheapest Cellular Plan
Free Sexy Indians
Call Center Software
Hot Indian
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