[Discuss-gnuradio] usrp transmit have some unknown peaks

[Page Jack]

Hi all,
I use usrp and rfx900 transmit signal, beside the main signal, dc offset, i q imbalance. there are still
some peaks which I don't know how them generated and do they harm for the main signal.
in the attachment photo, the three peaks in the middle is main signal, dc offset, i q imbalance. and
there are two other peaks in left and right. so what are they?

Regards

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