5.11 Angle Modulation: The Big Picture
This video is a summary about angle modulation (Exponential) modulation in about 5min. It covers:
Frequency modulation and phase modulation , PM and FM
Generation and demodulation, narrowband and wideband
Modulation index and deviation ratio
Carson's Rule and estimation of bandwidth
Generation of Wideband FM (WBFM):
Direct Method VCO (+,-)
Indirect Armstrong Method (See Examples)
Demodulation of FM/PM signals
Frequency Discriminator
Phase Locked Loop (PLL)
FM Receiver
88-108 MHz , 200 kHz/ Channel, IF=10.7 MHz
Super-heterodyne concept with envelope detector replaced by PLL or frequency discriminator.
Monophonic & compatibility with stereophonic (1dB).
Pre-Emphasis and De-emphasis