Front End (TUNER)
- From: "Myauk" <aungkokothet@xxxxxxxxx>
- Date: 22 Mar 2007 18:35:25 -0700
I had a chance to take a look of a typical analogboard circuit diagram
of a system having Television Receiving unit.
There is a tuner front end mounted on the analog board.
Accoring to circuit diagram, there is the antenna connection into the
front end module and SIF and CVBS output from it. It is controlled by
I2C input.
What I would like to know there is why the front end needs a voltage
as high as 33V.
And I would like to know the I2C control scheme (how it is controlled
digitally, and what are the parameter that can be controlled in the
tuner?) of the Tuner Front End Module.
Although I google the data, until know I only got the general
conceptions or overview of the Front End System.
I would like to have the basic information to design such Tuner Module
with I2C control scheme to expand the scope of design knowledge.
Can anybody show me the way or the site or anything?
Regards
.
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