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fanwei
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Registered: ‎05-29-2015

ZCU111 DAC and ADC loop testing with XM500

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 hi,  

  I have zcu111 board , i want to run a loop testing ,using DAC: send data(500Mhz),and mixer with 2Ghz,out .

  Using XM500, dac analong data  send to ADC, ADC sample rate at 4Ghz, and mixer with 2Ghz, and check data is right

  now,i have a problem:  the circuit determines ADC input must using DC-coupling,but  the the adc vcom voltage how to connect?

   

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klumsde
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Registered: ‎04-18-2011

can you just use a Balun on the xm500?

This doesn't need the link coupling to be DC. 

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klumsde
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Registered: ‎04-18-2011

can you just use a Balun on the xm500?

This doesn't need the link coupling to be DC. 

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View solution in original post

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fanwei
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Registered: ‎05-29-2015

thank you for reply. it seem to a good idea,

where i can find Balun  reference circuit  to  design my system?

 

 

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fanwei
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Registered: ‎05-29-2015

As far as I know,Balun can signal-end to diff or diff to signal-end 

DAC output is diff signal ,ADC input need diff signal ,how using Balun in this design?

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klumsde
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Registered: ‎04-18-2011

There are Balun channels on the card. Take a look at the ZCU111 User Guide. There is an appendix that shows you each channel 

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fanwei
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Registered: ‎05-29-2015

ok, i find it

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