analysis_project_4

Analysis_project_4 - kHz If the AM station is transmitting on a frequency of 980 kHz compute the maximum and minimum upper and lower sidebands and

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ECT 350 ELECTRONIC COMMUNICATIONS AM MODULATION ANALYSIS PROJECT 4 1. What is the intermediate frequency (IF) of your superheterodyne receiver? The intermediate frequency (IF) of the superheterodyne receiver is 455 kHz. 2. What is the bandwidth of an AM signal? The difference between upper and lower frequency limits of the signal or the equipment operation range. Bandwidth = (upper sideband frequency - lower sideband frequency) 3. What is the envelope of an AM signal? The envelope of a signal is the apparent signal seen by tracking successive peak values. It is a copy or duplicate of the intelligence signal. The envelope will always imitate the information. 4. A standard AM broadcast station is allowed to transmit modulating frequencies up to 5
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Unformatted text preview: kHz. If the AM station is transmitting on a frequency of 980 kHz, compute the maximum and minimum upper and lower sidebands and the total bandwidth occupied by the AM station. Upper: 980kHz + 5kHz = 985kHz Lower: 980kHz - 5kHz = 975 kHz Total BW is Upper Freq - Lower Freq = 985 - 975 = 10 kHz BW 5. An AM transmitter has a carrier power of 30 W. The percentage of modulation is 85 %. Calculate the following: (a) the total power. (b) the power in one sideband. a) 30 2 .85 1 2 = + 30(1.36125)= 40.8W b) 40.8-30 = 10.8W 10.2/2 = 5.4W...
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This note was uploaded on 11/14/2011 for the course ECT 350 taught by Professor Brom during the Summer '11 term at N.C. A&T.

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Analysis_project_4 - kHz If the AM station is transmitting on a frequency of 980 kHz compute the maximum and minimum upper and lower sidebands and

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