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Harmonics of carrier at TX output

Question asked by lmspirent on Jun 19, 2014
Latest reply on Jun 24, 2014 by tlili

We find some spurs at AD9361 TX output, they are odd harmonics of carriers of  carrier, the highest one is about 30dB lower than the carrier, when we change the frequency of carrier the frequencies of the spurs also change, when we increase the TX attenuation the level of the spurs drop. We made the measurement at the output of AD9361, so it is pretty sure the spurs are from the chip. Is there any way to reject the harmonics? Since we are doing wide band design, it is not possible to insert external filters,  is there any configuration about internal filters to reject the harmonics.

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