ADRV9009 TX pass band ripple

We have notice under certain conditions a ripple on the TX output.  The signal is a fully allocated 100 MHz NR SCS 30 kHz signal with a comb 4 structure - a 30 kHz tone every 4 tones.  The signal is outlined below and the ripple is significant - approximately 2 MHz,  2dB. Is there any signal processing in the TX path that could result in such ripple?  ripple