Now set Am to 0.6, Ac to 1.0, fe to 4 kHz, and the modulating frequency to 800 Hz. Increment Am to 1.4 in steps of 0.2 a

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Now Set Am To 0 6 Ac To 1 0 Fe To 4 Khz And The Modulating Frequency To 800 Hz Increment Am To 1 4 In Steps Of 0 2 A 1 (55.77 KiB) Viewed 17 times

Now set Am to 0.6, Ac to 1.0, fe to 4 kHz, and the modulating frequency to 800 Hz. Increment Am to 1.4 in steps of 0.2 and observe the resulting modulated signal, paying attention both to the envelope and carrier. 4) What happens when the amplitude of the signal (a) is equal to and (b) exceeds the amplitude of the carrier? 5) Observe closely the signal in the region where the envelope appears to reach zero and change sign. Can you determine whether it is the envelope that changed sign or the carrier phase was shifted by 180°? 6) Set Am to 2 and observe the resulting waveform. Could the signal be demodulated by synchronous detection? Explain.