Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Mod 5 > Mod 5 worksheets > Flashcards

Mod 5 worksheets Flashcards

1
Q

The process of superimposing an input signal, also called the intelligence signal, onto a carrier wave is called

A

Modulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which is not a form of modulation: Amplitude, Frequency, Phase, Time

A

Time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What type of modulation changes the voltage of the RF carrier for transmitting?

A

Amplitude

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In amplitude modulation, what parts of the intelligence waveform affect the amplitude of the modulated waveform.

A

Amplitude

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

In amplitude modulation, what are the output signals of the modulator?

A

USB, LSB

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which type of modulation inefficiently uses bandwidth and power during transmission?

A

AM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the important AFI for Spectrum Interference resolution Program

A

AFI 17-221

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

List three advantages of Amplitude modulation

A

Simple to implement. Demodulated with a Single diode rectifier circuit. Cheap

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is Neutral EMI

A

Man made devices such as florescent lights

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is Natural EMI

A

Non-man made, lightning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is RFI

A

Radio Frequency Interference

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Where do you look for information on ISP resolution

A

Paragraph 4 AFI 17-221

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

List three disadvantages of Amplitude Modulation

A

inefficient use of power. Inefficient use of bandwidth. Prone to high levels of noise.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The synchronous mode of TDM uses ____ bits

A

Frame

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The asynchronous mode of TDM uses ____ bits

A

Start and Stop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the characteristics of an antenna wave

A

Amplitude, Frequency, Wavelength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

When and what frequencies work better with sky waves?

A

Night, Lower

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Free electrons in the ionosphere form into electron clouds that vary in

A

thickness

19
Q

Signal absorption mainly occurs in the ___ layer of the ionosphere

A

D

20
Q

Caused by random changes in the air and weather

A

Tropospheric scintillation

21
Q

____ is the weakening of signals in the atmosphere

A

Atmospheric attenuation

22
Q

Electrical wavelength is measured in

A

Wavelength

23
Q

The difference in the length of a wave as it travels through a new medium is the ____

A

Electrical length

24
Q

Which field determines the polarization of an antenna?

A

E

25
Q

____ radiation patterns are plotted as a function of the square of the magnitude of electric and magnetic fields on a DB scale

A

Power

26
Q

____ radiation patterns are plotted as a function of electric and magnetic fields on a logarithmic scale

A

Field

27
Q

Interference from 2 or more electrical systems affecting all systems equally is _______

A

Mutual Interference

28
Q

What type of antenna uses a ground plane to create a ground reflected image?

A

Whip

29
Q

This antenna can be center fed, end fed, or offset fed

A

Dipole

30
Q

What is MUF

A

Maximum usable frequency (The frequency that doesn’t get absorbed or sent to space)

31
Q

What is VSWR

A

Voltage standing wave ratio, 1 to 1 is best

32
Q

What is this equation: C/F= Lambda

A

Electrical length. Speed of light, frequency, and wavelength

33
Q

What is velocity factor?

A

Whanging the speed of the EM waves below the speed of light. This is important for Electrical impedance.

34
Q

What is the law of reciprocity?

A

The antenna is just as good at receiving and transmitting

35
Q

What is antenna Gain.

A

The directivity of the antenna based on the dBi.

36
Q

What is an isotropic antenna?

A

A theoretical antenna that radiates perfectly in all directions.

37
Q

What is mutual interference?

A

When 2 or more devices interfere with each other.

38
Q

What are the important factors of radio etiquette?

A

Clarity, Simplicity, Brevity, Security

39
Q

What are thee Phonetic alphabet words for A, B, and C

A

Alpha, Bravo, Charlie

40
Q

What is takeoff angle?

A

The angle at which a radio wave leaves the antenna. Determines the Range.

41
Q

What device do Parabolic antennas use to transmit radio waves?

A

Feed horn (LOS)

42
Q

What is the important AFI that uses paragraph 4 for Installation Spectrum Managers (ISP).

A

AFI 17-221

43
Q

Encode is on which end

A

transmit

44
Q
A

Mod 5 (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions