Hello,
I would like to inquire because there is a phenomenon in which the DPD does not operate during DPD measurement.
Changed the Tx Analog Atten value of ADRV9029 from -5dB to -35dB. At this time, DPD Mean ORX Power changed from -15 to -45, and DPD Peak ORX Power changed from -5 to -10.
Logically, I think DPD Peak ORX Power should change to around -35. DPD doesn't seem to work well due to this issue.
Why isn't my DPD Peak ORX Power changing?
In my opinion, the signal from LO inside the ADRV9029 passes through the ADC and is input to the DPD Path.
If not, for some reason the DPD Peak ORX Power value does not change even if I adjust the Tx Analog Atten value of ADRV9029?
For reference, on boards where DPD operates normally, the DPD Peak ORX Power has changed to -35.
Thanks in advance.