I am using EV-ADF411XSD1Z to test ADF4112. I try to see the DVdd value at MUXOUT port. But the signal is 2V instead of 3V which is the real DVdd provided to the chip. I also use a voltage meter to measure the DVdd at T9 test point, it is 3V. And after I desoldered the chip and changed to a new one, DVdd at MUXOUT port became even lower(0.5V) ! Can any one tell what can be the reason for this, I literally did nothing except for giving the eval board a 7V DC power. What can be wrong??? Thank you.