Brainscape's Knowledge GenomeTM

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


See full index

Block 2 > Radio Wave > Flashcards

Radio Wave Flashcards

1
Q

Propagation

A

is the movement of EM waves through
space. EM waves, including radio waves, propagate at the
speed of light.

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

Cycle

A

one complete oscillation of a radio wave from neutral to positive, to negative, and back
to neutral.

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

Frequency

A

the number of complete cycles that occur in one second.

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

a wavelength is measured according to…

A

the distance traveled in one cycle, or crest to crest. The

higher the frequency, the lower the wavelength.

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

amplitude is measured according from…

A

the reference line

to the top of the crest (or bottom of the trough).

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

(kHz)

and how many Hz

A

kilohertz, 1,000Hz

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

(MHz)

and how many Hz

A

Megahertz, 1,000,000Hz

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

(GHz)

and how many Hz

A

Gigahertz, 1,000,000,000Hz

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

Voice-grade signals usually require a bandwidth of ___

kHz in order to be understandable

A

Voice-grade signals usually require a bandwidth of 3

kHz in order to be understandable

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

VLF
Used for?
Frequency Range?

A

Very Low Frequency
Long range communications; can wrap around the earth
Used for radio navigation, time signals for radio clocks, submarine
communications
3kHz-30kHz

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

LF
Used For?
Frequency Range?

A

Low Frequency
30kHz-300kHzLong range communications; ranges up to 2,000 KM
Used for longwave AM broadcasts in EU, amateur radio, some military
applications

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

MF
Used For?
Frequency Range?

A

Medium Frequency
300 kHz–3MHz
Medium range communications; ranges of hundreds of kilometers as a
ground wave
Used in some military applications, ship-to-shore radio, transoceanic air
traffic control, and commercial US AM radio stations

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

HF
Used For?
Frequency Range?

A

High Frequency
3MHz–30 MHz
Long distance sky wave communications; medium range direct wave
communications
Used by amateur and military users for sky wave communications, CB Radios

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

VHF
Used For?
Frequency Range?

A

Very High Frequency

30 MHz–300 MHz

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

UHF
Used For?
Frequency Range?

A 
Ultra High Frequency
300 MHz–3 GHz
Line-of-sight communications
Used for handheld radios, cellphones, Wi-Fi routers, Bluetooth, commercial
satellite radio, digital broadcast TV
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

SHF
Used For?
Frequency Range?

A

Super High Frequency
3GHz–30GHz
Line-of-sight communications
Concentrated, narrow-beam, high bandwidth communications
Used for datalinks, satellite data communications, short-range Wi-Fi routers,
radars

17
Q

EHF
Used For?
Frequency Range?

A 
Extremely High Frequency
30GHz–300GHz
Line-of-sight communications
Extremely high bandwidth communications
Used for radio astronomy and communications between satellite and
aircraft
18
Q

FDM

A

Frequency Division Multiplexing
places
different channels onto slightly different frequencies

19
Q

TDM

A

Time Division Multiplexing
assigns a
time slot to each channel, then rapidly alternates the
channels.

20
Q

ALE

A

Automatic link establishment
is a feature in High Frequency (HF) communications
radio transceiver systems that enables the radio station to make contact between itself and
another HF radio station network

To reach a specific station, the caller enters the
ALE address, which is very similar to a telephone number. The ALE controller then selects an
available idle channel for the destination address.

21
Q

FWA

A

Fixed wireless access
a point-to-point,
land-based, microwave signal transmission
platform used to connect two or more fixed
locations.

22
Q

The geographic region served by a mobile network is

subdivide into areas called___.

A

The geographic region served by a mobile network is

subdivide into areas called cells

23
Q

BTS

A

base transceiver station

24
Q

BSC

A

base station controller

25
Q

MSC

A

Mobile Switching

Center

26
Q

PSTN

A

Public Switched Telephone Network

essential link in completing voice calls and provides the
connection for calls between the caller and intended
receiver. GSM networks are not directly connected to one another. They connect to the nearest
PSTN which then transfers a call to other PSTN network

27
Q

IMEI

A

International Mobile Equipment Identity
identification number associated
with a mobile device

28
Q

IMSI

A

International Mobile Subscriber Identity
identifies the
individual subscriber on GSM network (the user of the device).

29
Q

MSISDN

A

Mobile Station International Subscriber Directory Number It is the public phone number assigned to the user. It includes the country code, national
destination code or national planning area, and the individual telephone number

Block 2 (2 decks)

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