In the datasheet of ADMV4928, I see the amplitude resolution can be 5bits or 6 bits in transmit mode? Is there anyway that I can switch between the two modes? I see two VGA in block diagram. One is before the phase shifter and the other is after the phase shifter. Does that mean, one VGA provides 6 bits resolution and the other is giving 5 bits? In that case which one is 5 bit and which one is 6 bit?