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AD9361 phase difference between 2 RX channels.

Question asked by Sim on Jul 23, 2018
Latest reply on Aug 1, 2018 by Sim

Hello,
I am interested to use Ettus B210 for DOA purposes.
According to[1], B210 is using AD9361 2X2 MIMO chipset.
According to AD9361 datasheet, both RX channels are being driven by the same LO[2].
However, according to[3][4], there is a phase difference between the two USRP-B210 channels.
According to[5], the RX channels are aligned in phase.
Would be glad to have a formal answer to the following 2 questions:
1. Is there a phase difference between the two USRP-B210 RX channels?
2. If there is a difference - what causes it?
Thanks in Advance.

[1] https://www.ettus.com/product/details/UB210-KIT
[2] http://www.analog.com/media/en/technical-documentation/data-sheets/AD9361.pdf
[3] http://ettus.80997.x6.nabble.com/USRP-users-Phase-jumps-in-USRP-B210-with-GPSDO-td7260.html
[4] http://ettus.80997.x6.nabble.com/Re-USRP-users-Random-Phase-Offset-Between-Two-Rx-Channels-of-B210-td10094.html
[5] http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2017-January/023422.html

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