Samsung NP-R20 Series Service Manual page 115

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11. References
Bandwidth
The number of bits that can be continuously transmitted or received per second. The higher the
bandwidth the more efficient as data can be transferred in a shorter time.
Address Bus
The data bus used to specify the address of an input or output device or memory by the CPU.
Control Bus
The data bus used to transmit control signals by the CPU so as to notify the storage device, input
or output, of the current status or changes.
rpm (revolutions per minute)
This refers to the speed of reading data saved on the platter of a hard disk drive. It is also called
revolutions per minute or disk revolutions per minute.
Platter
This refer to plates that are included on a hard disk drive and used to record data. Generally, a
hard disk drive consists of 2 to 8 platters.
Device
It refers to an electric or mechanical instrument. In PCs, it refers to the active devices used in
electric circuits such as transistor, ICE, etc.
Resistance
An electric characteristic that hinders current flow. All materials except for superconductors have
electric resistance. The symbol is 'R'. The unit is 'Ω'.
Audio Frequency
An audio frequency normally audible to humans. Although the audio frequencies may differ depending
on individuals and the volume and type of the sound, audio frequencies range roughly from 20 Hz to
20 kHz.
RTC (Real-Time Clock Generator)
An electronic circuit included on the main board and which maintains the time of day. It operates
even if the computer is turned off, as it operates on separate power. Since keeping the time of the
day is convenient, most computers nowadays adopt this circuit.
IMT-2000 (International Mobile Telecommunication-2000)
This is used in our country and it refers to FPLMTS (Future Public Land Mobile Telecommunication
Systems). The International Telecommunications Union Radio Communication Sector (ITU-R) has
standardized FPLMTS so that anyone can use various communication services (voice and data)
anywhere with a single terminal. Because the pronunciation of 'FPLMTS' is difficult, it was renamed
IMT-2000 in 1996.
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