Is there any possibility to change the sync depth with CVBS output with not changing the output gain?
Our customer are using ADV7390 as DIGITAL to CVBS.
And they said the output signal level is something wrong.
They input the color bar input signal by digital but the 100% white has only 704mV( I think 1V is correct),
and sync depth has only 212mV(I think 286mV is correct).
Their script is this.
And I tried this with ADV7180-ADV7391 EVAL board but nothing wrong.
=> We are inputting the color bar with CVBS so the white is not 100%white but sync depth is almost 286mV.
So I think some thing is wrong with the connection to ADV7390 output.
=> We know that our customer connect 75Ohms to GND but don't know what is connect from there on.
I think if they use ADV7390 with "DACoutputLevel = default" , this shouldn't happen.
I mean in any case , ADV7390 will output the DAC signal with 286mV sync depth.
Is my understanding is correct?
Or can this happen by the input signal or something?
Also if you can give me some advice why the sync depth is small ( it look like the output gain is 75%) ,
it would help us and our customer.