Question Pool -- Category E7D
Why must a very stable reference oscillator be used as part of a
phase-locked loop (PLL) frequency synthesizer?
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A.
- Any amplitude variations in the reference oscillator signal will
prevent the loop from locking to the desired signal
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B.
- Any phase variations in the reference oscillator signal will
produce phase noise in the synthesizer output
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C.
- Any phase variations in the reference oscillator signal will
produce harmonic distortion in the modulating signal
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D.
- Any amplitude variations in the reference oscillator signal will
prevent the loop from changing frequency
See answer.
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