(a) Design the block diagram of an Armstrong indirect FM modulator to generate an FM signal with a center frequency of 98.1 MHz and Af=75 kHz. Specify the frequency and Af at each stage in your diagram, as well as the multiplication factors and the LO frequency. The available narrowband FM generator has a center frequency of 100 kHz and Af= 10 Hz, and the local oscillator can be tuned in the range 10-11 MHz. You may use any number of doublers, triplers and/or quintuplers. (b) Determine the highest and lowest center frequency of the FM signal that can be obtained by tuning the local oscillator.

(a) Design the block diagram of an Armstrong indirect FM modulator to generate an FM signal with a center frequency of 98.1 MHz and Af=75 kHz. Specify the frequency and Af at each stage in your diagram, as well as the multiplication factors and the LO frequency. The available narrowband FM generator has a center frequency of 100 kHz and Af= 10 Hz, and the local oscillator can be tuned in the range 10-11 MHz. You may use any number of doublers, triplers and/or quintuplers. (b) Determine the highest and lowest center frequency of the FM signal that can be obtained by tuning the local oscillator.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter15: Alternating Current

Section: Chapter Questions

Problem 4RQ: 4. What is frequency?

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