--------------------
IrDA Communications is used to carry information between components via beams of light in the
infrared spectrum.
Infrared
refers to light waves of a lower frequency than human eyes can receive and
interpret. Infrared is used in most television remote control systems, and with a standard called IrDA
(Infrared Data Association) it's used to connect some computers with peripheral devices. With IrDA
communications there are a couple of drawbacks. First, infrared is a "line of sight" technology. For
example, you have to point the remote control at the television or DVD player to make things happen.
NOTE
In practice, the components should be no closer than 12 inches and no further apart then three
feet.
The second drawback is that infrared is almost always a "one to one" technology. You can send data
between your desktop computer and your laptop computer, but not your laptop computer and your PDA
at the same time.
These two qualities of infrared are actually advantageous in some regards. Because infrared transmitters
and receivers have to be lined up with each other, interference between devices is uncommon. The one-
to-one nature of infrared communications is useful in that you can make sure a message goes only to the
intended recipient, even in a room full of infrared receivers.
Operating with Battery Power
The computer operates on AC or battery power. This chapter contains the information you need to know
to operate the computer on battery power. It also includes information on how your computer manages
and saves power.
Battery pack
The computer uses a battery pack that gives you long use between charges.
Battery pack characteristics
The battery pack has the following characteristics:
z
Employs current battery technology standards
The computer uses a Lithium-Ion battery pack which does not have the memory effect problem of
Nickel Cadmium (NiCd) batteries. Li-Ion batteries consistently provide the longest battery life,
best-suited for road warriors.
72_0128_001
16 May 2005
© 2005 Itronix Corporation. All rights reserved.
GoBook
®
PRO II Help
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GoBook PRO II Help
5/16/2005
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Summary of Contents for GoBook PRO II
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