Main function of TV tuner
![Main function of TV tuner Main function of TV tuner](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgx1sSYUUubfW24nZu5p-BFthosvU1rRczzdnwOKmsFjmoDOeYUyHLAdaf29NhYViNbdJFKFdPmjSWlRR38d3HY2ODxR5TvMeUKJdhlCnM6ZEzMtnoGuI_ENQd4Pdacg4JEuNI9DQO9qydS/s1600-rw/Tuner+TV.png)
Block diagram of a series of TV tuner to receive the frequency VHF / UHF
Operational Tuner [Theoretical]
Tuner is controlled by a microprocessor in the TV chassis, which functions to receive / select a frequency. Exchange of information is channeled through the terminal Address, Clock and Data.
In the tuner, there are ICs that function to translate the instruction / data so that the tuner can function to select the desired frequency. The IC consists of some combination of series, including PLL, Local Oscillator [VCO], Mixer and IF amplifier. Everything artifacts in one chip / one chip. For further analysis, CXA3135 IC with I2C format will be taken as an example.
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