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a tx harmonic tone question

Question asked by little_fish@rf on Feb 23, 2018
Latest reply on Feb 26, 2018 by little_fish@rf

Dear sripad:

        i show you two picture in SA base on AD9361 TX below, one is +500KHz single tone, one is -500KHz single tone;

                                                                   +500KHz single tone SA picture

BBP send out a +500KHz single tone in MARK1, i can accept the 3th harmonic of the single tone power will be great, but why it locate in the -1.5M in MARK2, i consider it will locate in +1.5M; can you explain the situation to me?

                                                                   -500KHz single tone SA picture

BBP send out a -500KHz single tone in MARK1, i can accept the 3th harmonic of the single tone power will be great, but why it locate in the +1.5M in MARK2, i consider it will locate in -1.5M; can you explain the situation to me?

 

thanks very much.

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