The ADV7622/3 and ADV7511 have different ARC termination circuits. On the ADV7511, the coupling capacitors are in-line but on the ADV7622, the coupling capacitors are in parallel. Why is this?
There is a reference circuit shown in the following schematic for our ADV7511 evaluation board - http://www.analog.com/static/imported-files/eval_boards/ADV7511_ADV7343_Eval_Schematic.pdf. This board shows how the HPD must be tapped off before the AC coupling caps.