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Optimization of AFE function in ADV7842

Question asked by Hodaka on Jun 23, 2011
Latest reply on Aug 31, 2011 by Hodaka

Hello,

 

I read a document that attached the following Engineer Zone.
http://ez.analog.com/docs/DOC-1662

 

In "Figure 4: AFE" of "Gain Setting in the ADV7844_ADV7842.pdf", there is PGA(Programmable Gain Amplifier).

I have questions about PGA.

 

Q1. Is there the way to change a gain value of PGA?

 

Q2. If Q1 is yes, its way is to operate the following registers?
  AGC_MODE_MAN
  GAIN_MAN
  A_GAIN

 

Q3. If Q1 is yes, please teach me the way to change a gain value of PGA and take the maximum value of 1.4.

 

Please teach me.

 

Best regards.

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