Clarification on antenna mapping in PDOA Mode 3 (QM33120WDK1)

Hello,

I am working with the QM33120WDK1 kit and testing PDOA Mode 3.
From the documentation, I understand that in Mode 3 the receiver switches antenna ports in the middle of the STS sequence, resulting in two outputs: STS_POA and STS2_POA.

However, based on my own tests, it seems that in PDOA Mode 3 the second half (STS2 / STS2_POA) is actually being received on Antenna 1.
I was under the impression that by default the first half should correspond to Ant1 and the second half to Ant2, so this result is a bit confusing.

Could you please clarify:

  • In the default configuration of QM33120WDK1, which antenna is used for STS_POA and which for STS2_POA?
  • Is it expected that STS2_POA (STS2) is received on Ant1, or might this be related to configuration or interpretation?
  • If the default RF port is changed, does the mapping of STS_POA and STS1_POA swap accordingly?

Any official clarification or reference to register-level documentation for QM33120 would be very helpful.

Thank you!