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AD9361 1st symbol poor EVM

Question asked by I-Feng on Jan 22, 2016
Latest reply on Feb 24, 2016 by tlili



I have performance issue about AD9361. (sampling rate is 56MHz)


When I program the AD9361 at TDD mode, I use VSA to measure the RF EVM value. I found that 1st symbol EVM is about 3%, and other symbols EVM are about 1%.  1st symbol always get @@poor EVM


Is it possible that I miss some RF calculation? or is there any TDD parameter didn't program well?