If a signal layer
has digital and analog signals and sandwiched b/w gnd planes, which gnd is
reference plane for inr1? If inr1 has digital signals on right and analog
signals on left whereas inr2 has reverse,analog signals on right and digital on
left.GND1 has split plane (analog/digital) as per INR1 and GND 2 has split
plane as per inr2.
or we should have same cut out present in GND1 and GND2 to provide refrence gnd to INR1 layer?