I'm trying to export the Vcm through the Vref pin for a DC coupled application of AD9689-2600EBZ. I was successful in doing so by changing the following registers:
which gave me 1.4V on Vref. However, upon capturing data using the ACE software, or running the MATLAB remote ACE command client.Run('@AsyncDataCapture("DataSet_0")') the Vref pin drops to 0V. Is this normal behavior? Do I need to write these SPI commands after every capture?