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2ND SEMESTER_MIDTERM > COMNAV > Flashcards

COMNAV Flashcards

1
Q

It is a system model that describes a communication exchange between two stations.

A

COMMUNICATION SYSTEM

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2
Q

2 stations

A

TRANSMITTER

RECEIVER

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3
Q

The process of transferring the information between two points

A

COMMUNICATION

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4
Q

Communication can be?

A

WRITTEN

VERBAL

NON-VERBAL

VISUAL

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5
Q

It send the information, the medium to guide the information being sent

A

TRANSMITTER

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6
Q

It receive the information on the other end.

A

RECEIVER

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7
Q

Components of Communication System

A

SOURCE

INPUT TRANSDUCER

TRANSMITTER

ENCODING

MODULATION

CHANNEL

NOISE

RECEIVER

OUTPUT TRANSDUCER

DESTINATION

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8
Q

It is something that originates the message.

A

SOURCE

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9
Q

It is a sensor that converts original signal to electrical signal.

A

INPUT TRANSDUCER

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10
Q

It circuit that modifies the input electrical signal through an ANTENNA.

A

TRANSMITTER

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11
Q

Converting original information to information signal

A

ENCODING

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12
Q

The process of mixing the information signal with carrier signal

A

MODULATION

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13
Q

WHY DO WE NEED TO MODULATE SIGNALS?

A

It allows us to transmit low frequency signals

To reduce interference or Avoids mixing of signals

To reduce Antenna Size

Increase the range of communication

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14
Q

Range of human voice

A

300Hz to 3KHz

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15
Q

It is the medium by which the modulated signal is transmitted to the receiver.

A

CHANNEL

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16
Q

It is the pathway of the message.

A

CHANNEL

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17
Q

It is one of the channel imperfections or impairment in the received signal at the destination.

A

NOISE

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18
Q

the unwanted signal

A

NOISE

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19
Q

2 categories of noise

A

UNCORRELATED NOISE

CORRELATED NOISE

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20
Q

It is noise that is usually mutually related to the signal and cannot be present unless there is a signal

A

CORRELATED NOISE

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21
Q

It is noise that is present regardless of whether there is a signal present or not.

A

UNCORRELATED NOISE

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22
Q

3 types of uncorrelated noise

A

Atmospheric Noise

Industrial Noise

Extraterrestrial Noise

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23
Q

It receives the transmitted signal.

A

RECEIVER

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24
Q

It converts the electrical signal to original form.

A

OUTPUT TRANSDUCER

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25
The unit to which the message is communicated.
DESTINATION
26
A device that performs modulation
MODULATOR
27
3 types of signals
MESSAGE SIGNAL CARRIER SIGNAL MODULATED SIGNAL
28
The signal which contains a message to be transmitted to the destination
MESSAGE SIGNAL
29
The high energy or high-frequency signal which has characteristics
CARRIER SIGNAL
30
It is used to carry the message signal from transmitter to receiver.
CARRIER SIGNAL
31
The carrier signal is also sometimes referred to as an ___________________.
EMPTY SIGNAL
32
The combination of the carrier Signal and modulating signal.
MODULATED SIGNAL
33
2 types of modulation
ANALOG MODULATION DIGITAL MODULATION
34
2 types of modulation
ANALOG MODULATION DIGITAL MODULATION
35
3 basic types of analog modulation
Amplitude Modulation Frequency Modulation Phase Modulation
36
It is employed for efficient communication
DIGITAL MODULATION
37
A communication system may be categorized based on its _____________ and _______________.
PHYSICAL STRUCTURE SIGNAL SPECIFICATIONS
38
It is the transmitter and receiver are connected by a physical cable.
LINE COMMUNICATION SYSTEM
39
Wired (Line communication)
Parallel wire communication Twisted wire communication Coaxial cable communication Optical fiber communication
40
It an ANTENNA is an essential part; there is NO WIRE or physical medium between transmitter and receiver.
RADIO COMMUNICATION SYSTEM
41
Wireless (Space communication)
Ground wave communication Skywave communication Space wave communication Satellite communication
42
WIRED COMMUNICATION
PHYSICAL MEDIA NO ANTENNA USED ELECTRICAL SIGNAL NO MODULATION SHORT DISTANCE COMMUNICATION LESS COMPLEX
43
WIRELESS COMMUNICATION
NO PHYSICAL MEDIA ANTENNA IS ESSENTIAL USED ELECTROMAGNETIC WAVES HAVE MODULATION LONG DISTANCE COMMUNICATION MORE COMPLEX
44
It allows the sending of information in one direction only.
SIMPLEX COMMUNICATION CHANNEL
45
The information can be sent in both directions, but it doesn't allow both directions to operate at the same time.
HALF-DUPLEX COMMUNICATION CHANNEL
46
Information can flow in both directions, but it also can operate in both directions at the same time.
FULL-DUPLEX COMMUNICATION CHANNEL
47
It communicates data as electronic signals of varying frequency or amplitude.
ANALOG TECHNOLOGY
48
It is a continuous wave denoted by a sine wave and may vary in signal strength or frequency.
ANALOG SIGNAL
49
It is the transfer of signals that are not amplified to higher frequencies.
BASEBAND COMMUNICATION SYSTEM
50
They help in transferring signals with near-zero frequency.
BASEBAND COMMUNICATION SYSTEM
51
It transfer the information especially voice messages and calls by improving the frequency much higher than the actual rate.
CARRIER COMMUNICATION SYSTEM
52
4 groups of communication systems
Group I: Line/Radio Communication System Group II: Simplex/Duplex Communication System Group III: Analog/Digital Communication System Group IV: Baseband/Carrier Communication System
53
Analog signals = human voice Digital signals = binary data
ANALOG SIGNALS = HUMAN VOICE DIGITAL SIGNALS = BINARY DATA
54
It is a medium by which a signal travels.
COMMUNICATION CHANNEL
55
It is the reduction in the strength of analog or digital signal as it is transmitted over a communication medium.
ATTENUATION
56
An ___________ of the signal refers to the strength of the signal.
AMPLITUDE
57
It is the process to strengthen the amplitude of the signals using an electronic circuit.
AMPLIFICATIONS
58
It explains the range of frequency over which a signal has been transmitted.
BANDWIDTH
59
It takes a modulated signal and then extracts the original message from it.
DEMODULATION
60
It extends the range of communication systems by amplifying the signals.
REPEATER

2ND SEMESTER_MIDTERM (8 decks)

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