Frequency Modulation Engineering

amplifier amplitude modulation angular modulation anode audio frequency audio signal Capacitor carrier amplitude carrier frequency characteristic crest factor curve demodulated deviation ratio diagram difference discriminator distortion effect Electronics employed equation field strength fluctuational noise follows frequency band frequency deviation frequency modulated signal frequency modulation frequency modulation broadcast frequency modulation receiver frequency modulation system grid harmonic heterodyne horizontal polarisation impedance impulsive noise increased inductance input interference interfering signal intermediate frequency kc/s KILOWATTS layer limiter mc/s metres microvolts modulated transmission modulated wave modulating frequency modulation depth noise ratio normal noted obtained ohms oscillator output voltage passband peak phase modulation phase shift possible practical pre-emphasis Proc produced radiation reactance reactance valve receiver band-width reduced resistance Resistor result selective fading shown in figure shows sidebands signal to noise stage station threshold of improvement Ultra High Frequency unmodulated variations vertical polarisation voltage wanted signal WATTS wave-form wavelength zero