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about the performance of AD9914 in BPSK at 25 MHz toggle rate

Question asked by gging on Jul 19, 2017
Latest reply on Jul 20, 2017 by JLKeip

Hi, Engineers


We want to produce a BPSK signal on the AD9914 eval board by switching between two Proflies with 180° phase offset. ref_clock = 3.5 GHz, output frequency is 500 MHz, and the PS0 pin onboard is connected to an external signal generator which produces a 25 MHz square signal. 


Through the spectrum analyzer, we found the the performance not very good, the noise level is very high, and also some spurious.Would you please help us find is there any problem in the configuration?


Thank you very much!