We are considering using the AD8302 for a project, so I ordered the eval board and set it up in the following manner :
Connected input power to 5v dc supply. Verified 1.8v regulated output.
Attached signal generator to DDC, 350Mhz, +10.0 dbm output , -30db taps. Attached Fwd/Reflected to INPA and INPB respectively. Left the output side of the DDC open circuit. When I checked VPHS, under the following conditions, I received the following data :
Open Circuit 1.9v
50Ohm Load 1.01v
I was expecting open and short circuit to be about the same, and 50 ohm load to be closer to 1.8v.
Any direction is much appreciated.