I would like to know detail of QDUC mode of AD9789.
I found datasheet of AD9957 which mentions detail of QDUC mode.
Are AD9789(QDUC) and AD9957 same principle of operation?
They are different because the parts use different signal processing blocks. What kind of information do you need regarding the QDUC mode of AD9789 operation? IMO, the QDUC mode is covered well enough in the datasheet, the only thing that the datasheet lacks is the block diagram, which would show the particular blocks used.
Thank you for your reply.
We input complex data to AD9789. So, I would like to know how input data is processed at this block.
According to the datasheet:
Only channel 1 is enabled in this mode and the device processes input 32-bit data as a pair of 16-bit complex samples. QAM mapper and SRRC filters must be bypassed. The blocks that you can use are interpolation filter, rate converter and complex modulator (baseband upconverter). The output of the baseband upconverter is interpolated by 16x and the desired spectral image is filtered out by the tunable BPF.
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