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    FM analysis of NTSC signal

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    A low definition television signal is transmitted over a radio link using frequency modulation. The baseband video signal extends from 0 Hz to 1.0 MHz, and the signal voltage varies between 0 V and +1V. The modulation constant of the transmitter is 1 MHz per volt.

    a. What is the peak frequency deviation of the FM signal and bandwidth of the FM signal?

    b. The signal is received with CNR = 30.0 dB. What is the SNR of the recovered video signal at the radio receiver output?

    c. The signal could have been sent using DSB-LC modulation. What bandwidth would be required to transmit the signal with DSB-LC?

    d. Give two reasons why FM is used in this application rather than AM.

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    Solution Preview

    A low definition television signal is transmitted over a radio link using frequency modulation. The baseband video signal extends from 0 Hz to 1.0 MHz, and the signal voltage varies ...

    Solution Summary

    A low definition television signal is transmitted over a radio link using frequency modulation. The baseband video signal extends from 0 Hz to 1.0 MHz, and the signal voltage varies between 0 V and +1V. The modulation constant of the transmitter is 1 MHz per volt.

    The following are answered

    a. What is the peak frequency deviation of the FM signal and bandwidth of the FM signal?

    b. The signal is received with CNR = 30.0 dB. What is the SNR of the recovered video signal at the radio receiver output?

    c. The signal could have been sent using DSB-LC modulation. What bandwidth would be required to transmit the signal with DSB-LC?

    d. Give two reasons why FM is used in this application rather than AM

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