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To Improve SNR in AD9467-FMC-250EBZ

Question asked by TheepakShoundra on Feb 23, 2017
Latest reply on Feb 25, 2017 by UmeshJ

I have AD9467-FMC-250EBZ  and HSC-ADC-EVAL CZ board.

And I have followed the steps given ug-200.

 

But i am not getting the required SNR.

Testing condition:

used filter at analog input (C.F=70Mhz)

Connected internal oscillator Y200.

Fin=70MHz ( From Sig Gen)

Fs=250Mhz (in the ADC Data caputure- visual analog)

N=2048.

 

How to improve the SNR further ?

I have tried 2's compliments and buffer current.

how much buffer current i can keep ?

 

The graph plotting in visual analog is not working for samples of 65536.

for lower samples like 4096 its working once in a 4 times. still lower samples its working every run in the visualanalog.

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