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ADFMCOMMS1

Question asked by amruta.jadhav@gmail.com on Dec 20, 2013
Latest reply on Jan 20, 2014 by rejeesh

Hi,

 

I'm working with adfmcomms1 board with kc705 carrier board.A signal of 5 MHZ  is generated through DDS and passed to DAC as in the reference design.The DAC sampling rate is set to 491500000. If i change the DAC sampling rate to 100000000, then if i see the DAC output in oscilloscope then i get a signal of 1 MHZ signal ,but i have transmitted 5 MHZ sine wave from DDS.

 

after that if i change the DAC sampling rate ,  the signal i see on the dac output  vary(increased frequency).I have attached image  of the signal (dac output) for varying  DAC sampling rate.Can any body help?

 

Thank you

Amruta

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