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AD9166 plus ADS7-V2EB

Category: Hardware
Product Number: AD9166 DAC

Hi,

I am using and ADS7 FPGA board and an AD9166 DAC board. The software I am using to control both is the AD ACE (analysis control evaluation) plus the DPG Downloader software.

My issue is the DAC has an Reference input which can be derived from the onboard clocks or an external clock. 

I am trying to change from all internal clocking to internal clocking + external ref clock via J61

My questions are

(1) Which resistors do I need to change the position of to connect the external clock, on the schematic it is not too clear

(2) Can the external clock be a 10MHz reference from a sig gen or similar.

The issue I have is that I am using an FDAC frequency of 6GHz which is an input to the HMC7044 but this too high for the on board HMC7044 clock generation circuit which is limited to 3.2GHz

Thanks

Alan

Parents
  • Are you planning to use internal clock with external reference?  Your question is not clear to me. 

    HMC7044 provides SYSREF and reference clock to FPGA. sampling clock is supplied by ADF4372. Could you explain your actual issue.  

  • Thanks for getting back to me, I was trying to use the following settings to load 2 files via DPG but the set up crashed after couple of minutes.  

    The ACE settings are below:

     

    I have now added an external 10MHz reference via J61 at 0dBm level but didn't changed any resistors. It seems more stable and doesn't crash but my question is in this mode do I need to change any of the 0R link positions,

    Br

    Alan

Reply
  • Thanks for getting back to me, I was trying to use the following settings to load 2 files via DPG but the set up crashed after couple of minutes.  

    The ACE settings are below:

     

    I have now added an external 10MHz reference via J61 at 0dBm level but didn't changed any resistors. It seems more stable and doesn't crash but my question is in this mode do I need to change any of the 0R link positions,

    Br

    Alan

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