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Proper Use of MCS_RF_ENABLE (D3) of REG_MULTICHIP_SYNC_AND_TX_MON_CTRL

Question asked by wpearson on May 26, 2015
Latest reply on Jun 24, 2015 by mhennerich

I am trying to implement a 4x beamforming app using the FMCOMMS5 and have had several issues with what appear to be random 180deg phase offsets between the AD9361 devices.  I am using and external LO and when we off-tune and then tune back we notice the phase shift between pairs of channels.  UG671 provides clear definition that this bit must be enabled for coherent RF tuning, but nowhere in the source-code or driver do I every see it enabled and it is not mentioned in UG570.

 

My other reference to this 180deg issue is here:  9361 Clock Divider causing coherency problem between tunes

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