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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
Q

The unit to which the message is communicated.

A

DESTINATION

26
Q

A device that performs modulation

A

MODULATOR

27
Q

3 types of signals

A

MESSAGE SIGNAL

CARRIER SIGNAL

MODULATED SIGNAL

28
Q

The signal which contains a message to be transmitted to the destination

A

MESSAGE SIGNAL

29
Q

The high energy or high-frequency signal which has characteristics

A

CARRIER SIGNAL

30
Q

It is used to carry the message signal from transmitter to receiver.

A

CARRIER SIGNAL

31
Q

The carrier signal is also sometimes referred to as an ___________________.

A

EMPTY SIGNAL

32
Q

The combination of the carrier Signal and modulating signal.

A

MODULATED SIGNAL

33
Q

2 types of modulation

A

ANALOG MODULATION

DIGITAL MODULATION

34
Q

2 types of modulation

A

ANALOG MODULATION

DIGITAL MODULATION

35
Q

3 basic types of analog modulation

A

Amplitude Modulation

Frequency Modulation

Phase Modulation

36
Q

It is employed for efficient communication

A

DIGITAL MODULATION

37
Q

A communication system may be categorized based on its _____________ and _______________.

A

PHYSICAL STRUCTURE

SIGNAL SPECIFICATIONS

38
Q

It is the transmitter and receiver are connected by a physical cable.

A

LINE COMMUNICATION SYSTEM

39
Q

Wired (Line communication)

A

Parallel wire communication

Twisted wire communication

Coaxial cable communication

Optical fiber communication

40
Q

It an ANTENNA is an essential part; there is NO WIRE or physical medium between transmitter and receiver.

A

RADIO COMMUNICATION SYSTEM

41
Q

Wireless (Space communication)

A

Ground wave communication

Skywave communication

Space wave communication

Satellite communication

42
Q

WIRED COMMUNICATION

A

PHYSICAL MEDIA

NO ANTENNA

USED ELECTRICAL SIGNAL

NO MODULATION

SHORT DISTANCE COMMUNICATION

LESS COMPLEX

43
Q

WIRELESS COMMUNICATION

A

NO PHYSICAL MEDIA

ANTENNA IS ESSENTIAL

USED ELECTROMAGNETIC WAVES

HAVE MODULATION

LONG DISTANCE COMMUNICATION

MORE COMPLEX

44
Q

It allows the sending of information in one direction only.

A

SIMPLEX COMMUNICATION CHANNEL

45
Q

The information can be sent in both directions, but it doesn’t allow both directions to operate at the same time.

A

HALF-DUPLEX COMMUNICATION CHANNEL

46
Q

Information can flow in both directions, but it also can operate in both directions at the same time.

A

FULL-DUPLEX COMMUNICATION CHANNEL

47
Q

It communicates data as electronic signals of varying frequency or amplitude.

A

ANALOG TECHNOLOGY

48
Q

It is a continuous wave denoted by a sine wave and may vary in signal strength or frequency.

A

ANALOG SIGNAL

49
Q

It is the transfer of signals that are not amplified to higher frequencies.

A

BASEBAND COMMUNICATION SYSTEM

50
Q

They help in transferring signals with near-zero
frequency.

A

BASEBAND COMMUNICATION SYSTEM

51
Q

It transfer the information especially voice messages and calls by improving the frequency much higher than the actual rate.

A

CARRIER COMMUNICATION SYSTEM

52
Q

4 groups of communication systems

A

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
Q

Analog signals = human voice

Digital signals = binary data

A

ANALOG SIGNALS = HUMAN VOICE

DIGITAL SIGNALS = BINARY DATA

54
Q

It is a medium by which a signal travels.

A

COMMUNICATION CHANNEL

55
Q

It is the reduction in the strength of analog or digital signal as it is transmitted over a communication medium.

A

ATTENUATION

56
Q

An ___________ of the signal refers to the strength of the signal.

A

AMPLITUDE

57
Q

It is the process to strengthen the amplitude of the signals using an electronic circuit.

A

AMPLIFICATIONS

58
Q

It explains the range of frequency over which a signal has been transmitted.

A

BANDWIDTH

59
Q

It takes a modulated signal and then extracts the original message from it.

A

DEMODULATION

60
Q

It extends the range of communication systems by amplifying the signals.

A

REPEATER

2ND SEMESTER_MIDTERM (8 decks)

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