[Eclypse Z-7 ADC1410]

the last 2 bits were unimportant, solved thanks

[Eclypse Z-7 ADC1410]

 https://reference.digilentinc.com/reference/programmable-logic/eclypse-z7/low_level_zmod_adc_dac  I'm trying to run ADC in PL by referencing the project here.

 This is my design. Using Digilent's Analog 2 Discovery, I send sine waves, square waves over Waveforms Platforms, and observe over ILA. 

 But I can't analyze the data. "dADC_Data" is 14 bit DDR parallel data bus exported by ADC containing Channel1 and Channel 2 multiplexed samples.  Could you explain why "sCh2Out" data 16 bits? 

sCh2CouplingConfig's value is '0'. That's mean DC Coupling. I should observe unsigned data. But when ı sent the data as DC, I observe 65464... I think it is signed value. How can I decide if data value's signed or unsigned?