Howtosignalprocessing
- What is FM phase deviation?
- What is the effect on the deviation of an FM signal?
- What determines the deviation in FM?
What is FM phase deviation?
In phase modulation, the maximum difference between the instantaneous phase angle of the modulated wave and the phase angle of the carrier. Note: For a sinusoidal modulating wave, the phase deviation, expressed in radians, is equal to the modulation index.
What is the effect on the deviation of an FM signal?
ANSWER: Remains unchanged
When the FM signal is passed through a mixer, the mixer changes the carrier frequency but the deviation remains unchanged.
What determines the deviation in FM?
f(t) = f0 + ∆f(t) Peak deviation: In the case of frequency modulation, the peak deviation ∆f is the absolute maximum of the difference between the unmodulated carrier frequency (f0) and the instantaneous frequency f(t).
