In-depth analysis of TV transmitter principle

Features of analog TV transmitter

　　 Both image signal and sound signal are transmitted at the same time.

　　 Transmit with VHF (meter wave) and UHF (decimeter wave) bands.

　　 Image emission adopts amplitude modulation and vestigial sideband method.

　　 Accompanying sound transmission adopts frequency modulation method.

　　Using intermediate frequency modulation method;

　　 Image IF: 38MHz, Audio IF; 31.5MHz (PAL-D/K system)

　　 The frequency difference between the image carrier frequency and the sound carrier frequency must be strictly maintained.

　　The image and sound power ratio is usually 10:1

　　 IF pre-correction technology to ensure superior cost performance.

　　 TV transmitter single channel transmitter and dual channel transmitter.

　　The contemporary TV transmitter adopts an all-solid-state single-channel method.

　　All solid-state power amplifiers use cascaded power amplifiers with a power gain greater than 40dB, and the final power amplifier works in Class AB.

　　Intelligent monitoring system, simple operation and convenient maintenance

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