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Communications 1 > Amplitude Modulation > Flashcards

Amplitude Modulation Flashcards

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

A

Unmodulated Pulses

20
Q

FCC Emission Designations (First Symbol) - Q

A

Angle Modulated during Pulses

21
Q

FCC Emission Designations (First Symbol) - R

A

Single Sideband Reduced Carrier

22
Q

FCC Emission Designations (First Symbol) - V

A

Combination of any
Pulse Modulations

23
Q

FCC Emission Designations (First Symbol) - W

A

Combinations of any
two or more forms
of Modulation

24
Q

FCC Emission Designations (First Symbol) - X

A

Cases not covered

25
Q

FCC Emission Designations (Second Symbol) - 0

A

No Modulating Signal

26
Q

FCC Emission Desig1ations (Second Symbol) - 1

A

Digitally Keyed Carrier

27
Q

FCC Emission Designations (Second Symbol) - 2

A

Digitally Keyed Tone

28
Q

FCC Emission Designations (Second Symbol) - 3

A

Analog

29
Q

FCC Emission Designations (Second Symbol) - 7

A

Multiple Digital Channel

30
Q

FCC Emission Designations (Second Symbol) - 8

A

Multiple Analog Channel

31
Q

FCC Emission Designations (Second Symbol) - 9

A

Channels with Analog and Digital

32
Q

FCC Emission Designations (Third Symbol) - A

A

Telegraphy(manual)

33
Q

FCC Emission Designations (Third Symbol) - B

A

Telegraphy (automatic)

34
Q

FCC Emission Designations (Third Symbol) - C

A

Facsimile

35
Q

FCC Emission Designations (Third Symbol) - D

A

Telemetry(Data)

36
Q

FCC Emission Designations (Third Symbol) - E

A

Telephony(Sound Broaadcasting)

37
Q

FCC Emission Designations (Third Symbol) - F

A

Television(video signal)

38
Q

FCC Emission Designations (Third Symbol) - N

A

No Information

39
Q

FCC Emission Designations (Third Symbol) - W

A

Combination of Above

40
Q

In FCC Emission designation, the first symbol signifies the

A

Type of modulation of the main carrier

41
Q

In FCC Emission designation, the second symbol signifies the

A

Nature of the modulation

42
Q

In FCC Emission designation, the third symbol signifies the

A

information being transmitted

43
Q

simplest way of superimposing the characteristic of the intelligence signal onto a carrier

A

AM

44
Q

produced by varying the amplitude of the carrier signal in proportion to the instantaneous amplitude of the intelligence signal

A

AM

45
Q

term that describes the amount of amplitude change in an AM waveform

A

Modulation Index

46
Q

also called Coefficient of Modulation, Modulation Factor, or Modulation Depth.

A

Modulation Index

Communications 1 (7 decks)

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