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Communications 1 > Amplitude Modulation > Flashcards

Amplitude Modulation Flashcards

(46 cards)

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1
Q

the process of altering a characteristic of the carrier in
accordance with the instantaneous value of the intelligence signal.

A

Modulation

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2
Q

Modulation

A

the process of altering a characteristic of the carrier in
accordance with the instantaneous value of the intelligence signal.

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3
Q

Characteristics of the carrier that can be varied in modulation

A

amplitude,
frequency and phase.

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4
Q

process of recovering the intelligence signal from a
modulated carrier signal

A

Demodulation

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5
Q

Demodulation

A

process of recovering the intelligence signal from a
modulated carrier signal

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6
Q

Reasons for Modulation

A

-For minimizing interference
-For frequency assignment
-For making antenna sizes practical
-For multiplexing

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7
Q

FCC Emission Designations (First Symbol) - A

A

Amplitude
Modulation, Double
Sideband Full Carrier

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8
Q

FCC Emission Designations (First Symbol) - B

A

Independent Sideband

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9
Q

FCC Emission Designations (First Symbol) - C

A

Vestigial Sideband

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10
Q

FCC Emission Designations (First Symbol) - D

A

Simultaneous/Sequences AM and FM

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11
Q

FCC Emission Designations (First Symbol) - F

A

Frequency Modulation

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12
Q

FCC Emission Designations (First Symbol) - G

A

Phase Modulation

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13
Q

FCC Emission Designations (First Symbol) - H

A

Single Sideband Full Carrier

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14
Q

FCC Emission Designations (First Symbol) - J

A

Single Sideband Suppressed Carrier

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15
Q

FCC Emission Designations (First Symbol) - K

A

Pule Amplitude Modulation

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16
Q

FCC Emission Designations (First Symbol) - L

A

Pulse Width Modulation

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17
Q

FCC Emission Designations (First Symbol) - M

A

Pulse Position Modulation

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18
Q

FCC Emission Designations (First Symbol) - N

A

Unmodulated Carrier

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19
Q

FCC Emission Designations (First Symbol) - P

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A

Unmodulated Pulses

20
Q

FCC Emission Designations (First Symbol) - Q

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A

Angle Modulated during Pulses

21
Q

FCC Emission Designations (First Symbol) - R

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A

Single Sideband Reduced Carrier

22
Q

FCC Emission Designations (First Symbol) - V

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A

Combination of any
Pulse Modulations

23
Q

FCC Emission Designations (First Symbol) - W

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A

Combinations of any
two or more forms
of Modulation

24
Q

FCC Emission Designations (First Symbol) - X

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A

Cases not covered

25
FCC Emission Designations (Second Symbol) - 0
No Modulating Signal
26
FCC Emission Desig1ations (Second Symbol) - 1
Digitally Keyed Carrier
27
FCC Emission Designations (Second Symbol) - 2
Digitally Keyed Tone
28
FCC Emission Designations (Second Symbol) - 3
Analog
29
FCC Emission Designations (Second Symbol) - 7
Multiple Digital Channel
30
FCC Emission Designations (Second Symbol) - 8
Multiple Analog Channel
31
FCC Emission Designations (Second Symbol) - 9
Channels with Analog and Digital
32
FCC Emission Designations (Third Symbol) - A
Telegraphy(manual)
33
FCC Emission Designations (Third Symbol) - B
Telegraphy (automatic)
34
FCC Emission Designations (Third Symbol) - C
Facsimile
35
FCC Emission Designations (Third Symbol) - D
Telemetry(Data)
36
FCC Emission Designations (Third Symbol) - E
Telephony(Sound Broaadcasting)
37
FCC Emission Designations (Third Symbol) - F
Television(video signal)
38
FCC Emission Designations (Third Symbol) - N
No Information
39
FCC Emission Designations (Third Symbol) - W
Combination of Above
40
In FCC Emission designation, the first symbol signifies the
Type of modulation of the main carrier
41
In FCC Emission designation, the second symbol signifies the
Nature of the modulation
42
In FCC Emission designation, the third symbol signifies the
information being transmitted
43
simplest way of superimposing the characteristic of the intelligence signal onto a carrier
AM
44
produced by varying the amplitude of the carrier signal in proportion to the instantaneous amplitude of the intelligence signal
AM
45
term that describes the amount of amplitude change in an AM waveform
Modulation Index
46
also called Coefficient of Modulation, Modulation Factor, or Modulation Depth.
Modulation Index

Communications 1 (7 decks)

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