I-Bus 0818D, Руководство пользователя

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Appendix 2 – Glossary of Terms
0818D User’s Guide A2-1
B
backplane: A device inside the chassis that contains slots, or
sockets, for plugging in I/O cards or cables.
bidirectional parallel port : An eight-bit port that can be used as an
input as well as an output device.
bus : One or more electrical conductors that transmit power or data
to the various sections of a computer or any common pathway
between hardware devices. A computer bus connects the CPU to its
main memory and the control units of peripheral devices.
C
card cage: A cabinet or metal frame that holds printed circuit cards.
CMOS (Complementary Metal Oxide Semiconductor): A technology
of arranging transistors on a semiconductor which uses very low
power.
D
disk access LED: The LED located on the front control panel that
indicates when the hard disk drive is active.
DRAM (Dynamic Random Access Memory): A type of computer
memory that needs to be refreshed by a memory controller or it loses
its information.
drive bay: Area in the chassis where drives are mounted.
E
electrostatic discharge (ESD): A sudden uncontrolled movement of
accumulated electrical charge from one location to another. Voltage
potentials and discharge currents associated with ESD can damage
many types of electronic components used in computers. ESD
prevention methods should always be employed when servicing
computer hardware.
EMI (ElectroMagnetic Interference): Noise generated by the
switching action of the power supply and other system components.
Conducted EMI is interference generally conducted into the power
line, and is normally controlled with a line filter. Radiated EMI is that