Year 10 Computer Science Vocab List. Data Representation And Communication T1

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56 Terms

1
Binary
A system of communication that uses 2 symbols only.
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2
ADC
Analog to Digital Conversion, the process of converting an analog signal to digital.
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3
Amplitude
Size or magnitude of a signal (wave).
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4
Analog
Real (physical) entity - or copy of something real, e.g. an analog watch displays 2 hands.
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5
Collision
When 2 signals are sent at once and they interfere with each other.
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6
Continuous
Values that blend smoothly into each other; cannot write down all possible continuous values.
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7
Cross-talk
When signals within 1 wire affect signals in another wire.
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8
Cycle
Part of a process that repeats.
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9
DAC
Digital to Analog Conversion, the process of taking a digital signal and converting it into an analog signal.
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10
Denary
Base 10.
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11
Digital
A system where information is encoded discreetly.
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12
Discrete
In distinct chunks; opposite of continuous.
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13
Frequency
A measure of radio waves; high frequency radio waves can carry more data faster.
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14
Magnitude
Size.
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15
Medium
The physical ‘stuff’ a signal travels through, e.g., wires, air.
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16
Modulation
Changing the form/shape of a signal, e.g., wireless to optical.
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17
Overflow
When the addition of 2 binary numbers has a carry on the last bit, resulting in more bits than the operands.
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18
Parallel
When 2 or more components are joined side by side.
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19
Prefix
The letters at the start of a number, to indicate binary or denary.
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20
Pulse
A single discrete part of a digital electrical signal.
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21
Serial
When 2 or more components are connected end to end.
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22
Skew
When signals in parallel wires arrive at their destination at slightly different times.
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23
Suffix
A number/text at the end of a number to indicate binary or denary.
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24

Bus

Set of wires connecting multiple devices together

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25

Computer

Any device that can manipulate data

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26

Peripheral Devices

Any (non-computational) device connected to a computer. E.g printer, speaker

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27

Pulse Code Modulation

Technique to convert analog data to digital signal.

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28

What is Method of ADC

 Sampling

 Quantization.

 Binary encoding.

 Line or block coding.

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29

Sampling rate

Number of samples per second.

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30

Sampling interval

Ts s

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31

Quantization

A method of assigning integer values in a specific range to sampled instances.

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32

Binary encoding

Each quantized samples is translated into equivalent binary codes . 

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33

Line encoding

The binary digits/information inside the ADC device is then transformed to a digital signal so it can be transmitted.

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34

Pulse Code Demodulation

Modulation process in reverse.

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35

Pulse Amplitude Modulation (PAM)

Uses sampled pulses to encode an analogue waveform

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36

Pulse Width Modulation

Create an analog type signal from a constant digital type signal.

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37

Duty Cycle

The duty cycle is how long the output is 'on' for in a given period.

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38

Mean Value

Average perceived value

Duty Cycle * Maximum Value

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39

Mean Amplitude

Duty Cycle * Maximum Amplitude

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40

Max amplitude

256

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41

ON Time

Duty Cycle x Period

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Off Time

Period - ON Time

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Mean

DutyCycle x Amplitude

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44

Average signal amplitude

10

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45

RAM slot

Hold and connect RAM modules

Runs apps efficently

Expands memory capacity

Can do multitasking

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46

BIOS chip

Basic input/output system

Lets you access and set up your computer system at the most basic level

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47

PCI-e slot

Connect various internal components in the computer system

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48

CMOS backup battery

Retain system settings, boot systems and BIOS configurations

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49

SATA Socket

Transmit data between the storage device and the computer

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50

CPU socket

Is a processer socket

Connection allows a computer processor to connect to a motherboard

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51

24 pin power socket

The main power cable which connects the motherboard to the power supply

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52

USB port on Backplane

Connect USB device, keyboards, and mice

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53

Period

Time for 1 cycle

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54

RAM

Random access memory

Stores and opens files

Runs programs

Part of operating system

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55

ROM

Read only Memory

Non violate

BIOS

Chip soldered into motherboard

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