Hi Kou-san,
Yes, the AD9257 output Bits[13:0] are being counted as Bits[15:2]. There is a work-around we can do in the VisualAnalog Samples Canvas. There is a VisualAnalog Component called Bit Shifter. Drag a Bit Shifter block onto the Samples canvas from the list on the left-hand side of the VisualAnalog window. Connect it between the ADC Data Capture block and Input Formatter, as shown in the figure below.
Bit Shifter Settings
Direction: Down
Bit Resolution: 14
Shift: 2
Input Formatter Settings
Resolution: 14
Alignment: 14
This should produce the correct codes. Again, I apologize for the trouble.
Please let me know if this does or does not work.
Thank you.
Doug
