DPD GUI PA Calibrations not working

Hello everyone,

I am getting started with the AD9375 and I wish to use it to test out the DPD Algorithm.

I am using the SKY-PA that comes with the kit for the test.

I'm following the instructions on the UG-992 DPD-section: I set up a waveform and load it, turn on the PA, can see the pink trace on the screen of the distorted signal received on ORx.

I click on Initialize PA Cals but nothing happens. The button "Initialize PA Cals" turns gray (no more clickable), the three buttons on its right (Enable CLGC, VSWR Measure, DPD Adaption) all remain gray, and the carrier seen on the waveform disappears.

Very confusing.

Any help is highly appreciated !