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categoryالهندسة الكهربائية schoolبكالوريوس event_available2026-07-15

السؤال

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2) Consider the screen shot below obtained from a scope in the lab. Displayed on the scope is a signal (square wave) in both the time and frequency domains. Fill out the table below. Hint: First determine the fundamental frequency, and then consider how harmonic frequencies are obtained. Note: you can zoom in on this page on your computer to enlarge the plot if necessary. File Control View Window Export +XY +Zoom FFT Spectrogram Single Stop C1 V > Trig'd Mode: WF1 - Oscilloscope 1 Histogram Persistence Data Measurements Logging Audio X Cursors Y Cursors Notes Digital Measurements Repeated Auto Source: Channel 1 Condition: Rising Level: 1V C1 C2 8192 samples at 1.5873 MHz | 2020-07-21 10:36:33.227 Start: 0 Hz Center: 10 kHz Stop: Span: 20 kHz 20 kHz Top: Units: dBV 0 dBV -2.1 ms -1.6 ms -1.1 ms -0.6 ms -0.1 ms 0.4 ms FFT 0.9 ms 1.4 ms 1.9 ms Bottom: -50 dBV Type: Sample Reference: 1 Count: 100 2.4 ms 2.9 ms Window: Hamming Beta: 8 dBV 10 Label -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 x 0 kHz 2 kHz 4 kHz 6 kHz 8 kHz 10 kHz 12 kHz 14 kHz 16 kHz 18 kHz 20 kHz Harm. f(kHz) P(dBW) n = 1 n = 2 n = 3 n = 4 n = 5 n = 6 n = 7 n = 8 n = 9 P(W)

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