- Q15 Suppose A Narrowband Fm Nbfm System S Output Is A Fo 100 Mhz Sinusoidal Carrier Modulated At A Modulation In 1 (72.19 KiB) Viewed 38 times
= Q15) Suppose a narrowband FM (NBFM) system's output is a fo' = 100 MHz sinusoidal carrier modulated at a modulation in
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= Q15) Suppose a narrowband FM (NBFM) system's output is a fo' = 100 MHz sinusoidal carrier modulated at a modulation in
= Q15) Suppose a narrowband FM (NBFM) system's output is a fo' = 100 MHz sinusoidal carrier modulated at a modulation index of ß' = 0.066. (a) Using Armstrong's indirect method (Fig. Q15), determine the number of frequency- doubling stages needed to produce a wideband FM signal with a carrier frequency of strictly 800 MHz and a modulation index of approximately 0.5? [4 marks] (b) What is the consequence of the wideband FM system in (a) not satisfying the modulation index specification of 0.5? [3 marks] f' and B' NBFM FM signal Fig. 215 frequency doubler frequency doubler
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