ADS5294EVM: Few ADC input channels not working for ADS5294 EVM

hi all,

we are workinng with 8 channel ADC = ADS5294

input to ADC is 2MHz and -30dBm from signal generator

the following input channels have issues of high noise floor of about 45dB and contains harmonics having same level as that of fundamental frequency(2MHz)

channel - 2 ,4,7

and channel 8 has no frequency peak at all.

and other channels are working fine.

Thanks and Regards

Suraj Gaonkar