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(6) Consider a system that FM modulates a carrier of frequency fc = 80 MHz carrier with a message signal of 20 kHz. The
Posted: Sun May 15, 2022 7:53 pm
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- 6 Consider A System That Fm Modulates A Carrier Of Frequency Fc 80 Mhz Carrier With A Message Signal Of 20 Khz The 1 (47.05 KiB) Viewed 38 times
(6) Consider a system that FM modulates a carrier of frequency fc = 80 MHz carrier with a message signal of 20 kHz. The modulation index is ß = 5. (a) Estimate the bandwidth of the transmitted signal. [3 marks) (b) In order to realize this system using Armstrong's indirect method with three frequency- doubling stages (Fig. 26), what carrier frequency fo and modulation index B' are required for the NBFM system? [4 marks) fc' and B' FM signal Fig. 26 frequency NBFM frequency frequency doubler doubler doubler