BIST output on FMCOMMS5

I am trying to sanity check the FMCOMMS5 board I have by using BIST for the TX output.  I have reviewed the BIST FAQ, and set the registers for a tone accordingly.  I have run "ad9361_init" with sample rates and synthesizer settings that match my RX.  I can successfully receive with those settings, but not transmit.  I don't even see a carrier or tone on the TX1A output.  Are there any other register (or functions) that need to be configured to get the TX output going?


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