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chapter 1
cdc's chapter 1
9
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Professional
09/08/2012

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Term
What reason for modulation involves modulating low frequency signals for transmission over long distances?
Definition
Ease of radiation
Term
What are the three general categories used to produce modulation in radio frequency transmission today?
Definition
Amplitude, frequency, and phase
Term
When the modulating signal and carrier signal are combined within a modulator, the output signal contains a/an
Definition
carrier, upper sideband, and lower sideband
Term
If a carrier frequency of 1 MHz and a modulating tone of 10 kHz goes to the modulator, the output signal include
Definition
1.01 MHz, 1 MHz, and 0.99 MHz
Term
If the modulating audio signal is 10kHz wide, what is the bandwidth of the transmitted amplitude modulated signal?
Definition
20kHz
Term
The bandwidth of an amplitude modulated signal is
Definition
two times the modulating signal
Term
The amount of effect or change that the intelligence has on the carrier in an amplitude modulated signal is expressed as the
Definition
percent of modulation
Term
Which statement concerning bandwidth is true?
Definition
Overmodulating increases bandwidth due to the production of harmonics
Term
Reducing modulation to less than 100% gives
Definition
a reduction in carrier and sideband power
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