I am new to making use of evaluation boards so I apologize for any trivial questions that I would ask. I'm aware that one of the outputs needs to be terminated to a 50 ohm load if not used. However, since I still do not have the appropriate connectors I tried to leave both outputs hanging. When I ran the software, It displayed "USB OK" and I could see D5 turning on. However, whenever I try to update the registers or do any changes to the values within the software, D5 turns off.
Is this a direct consequence if I left the outputs hanging?
My set up is:
Supply coming ONLY from the USB
RFoutA and RFoutB - No load
ADF4350 Evaluation Kit CD Ver 2.7