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A few questions about AD9164-FMCB-EBZ Evaluation Board

Question asked by zenghao on Apr 17, 2018
Latest reply on Apr 18, 2018 by saberbf

       We purchased AD9164-FMCB-EBZ Evaluation Board and ADS7-v2EBZ Board. When we used them to evaluate the performance of AD9164, we have encountered some problems.

1.The data we tested was inconsistent with the data given in the data sheet. For example, we use DC test mode to get the 2 GHZ , but the 3 GHZ image frequency(about -20 dBc) is much bigger than figure 16 of page 16. I I would like to know why.(we already config AD9164 like the data sheet said)

2.In the Table 9, it shows when FIR85 enable, single tone, fdac = 5 GSPS, we can get a 4 GHZ output with -60 dBc SFDR. I wonder the 4 GHZ is from the NCO or the DPG? What is the magnitude of 4 GHZ?  What is the magnitude of 1 GHZ?

3.when we use 6 GHZ as AD9164’s clock, the interpolation must be bigger than 3 , so the Data Rate will be less than 2 GHZ. Are we right? If we are ,what’s the advantage of it considering we can get 5 GHZ Data Rate when we use 6 GHZ as AD9164’s clock.

Looking forward to your reply, thank you !