Questions and Answers
Why do most modern FM transmitters use phase modulation instead of direct FM?
To optimize the carrier oscillator for frequency accuracy and stability.
What types of oscillators can be used to set and maintain the carrier frequency accurately?
Crystal oscillators or crystal-controlled frequency synthesizers.
What is a limitation of simple phase shifters based on RC or LC tuned circuits?
They do not produce linear response over a large range of phase shift.
What must be done to achieve the desired deviation with simple phase shifters?
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What is the simplest type of phase shifter mentioned in the text?
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In the RC network phase shifter shown in Fig. 6-10(a), what is the range of phase shift between the input and output signals?
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