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adfmcomms1 ebz adc output

Question asked by git on Jan 7, 2014
Latest reply on Jan 14, 2014 by mhennerich

Hi,

 

i used the dac_dma_setup() to generate a square wave at the output of dac(ad9122)as follows

 

const uint16_t sine_lut[32] = {

  0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,

          0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,

          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,

  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000

};

 

 

The wave is generated perfect at the dac outputs. I have connected the the two RF port together using RF cables.the output of adc on chipscope looks  different then transmitted a snapshot of chipscope is attached below.why??

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