GLOSSARY
USER’S MANUAL
77
Depth of Field (DOF)
The portion of a scene that appears acceptably sharp in the image. Although a lens can
precisely focus at only one distance, the decrease in sharpness is gradual on each side of
the focused distance, so that within the DOF, the unsharpness is imperceptible under
normal viewing conditions.
Dock
A dock is used for charging the terminal battery and for communicating with a host
computer, and provides a storage place for the terminal when not in use.
ESD
Electro-Static Discharge
Firmware
A software program or set of instructions programmed on a hardware device. It pro-
vides the necessary instructions for how the device communicates with the other com-
puter hardware. Firmware is typically stored in the flash ROM of a hardware device.
While R
OM is "read-only memory," flash ROM can be erased and rewritten because it is
actually a type of flash memory.
Host
A computer that serves other mobile computers in a network, providing services such as
network control, database access, special programs, supervisory programs, or program-
ming languages.
IEC
International Electrotechnical Commission. This international agency regulates laser
safety by specifying various laser operation classes based on power output during oper-
ation.
IEEE 802.11
A set of standards carrying out wireless local area network (WLAN) computer communi-
cation in the 2.4, 3.6 and 5 GHz frequency bands. They are created and maintained by
the
IEEE LAN/MAN Standards Committee.
Laser
Light Amplification by Stimulated Emission of Radiation.The laser is an intense light
source. Light from a laser is all the same frequency, unlike the output of an incandescent
bulb. Laser light is typically coherent and has a high energy density.
Light Emitting Diode (LED)
A low power electronic light source commonly used as an indicator light. It uses less
power than an incandescent light bulb but more than a Liquid Crystal Display (LCD).
Liquid Crystal Display (LCD)
A display that uses liquid crystal sealed between two glass plates. The crystals are
excited by precise electrical charges, causing them to reflect light outside according to
their bias. They use little electricity and react relatively quickly. They require external
light to reflect their information to the user.
Pairing
A Bluetooth@ pairing occurs when two Bluetooth@ devices agree to communicate with
each other and establish a connection.
To Next Page
Loading...
Need help?
General
