Can not capture data from ADS7-V2EBZ

Hi,

 Recently, when I program FPGA  on ACE using  AD6688-3000EBZ with ADS7-V2EBZ, I measure

the output clk of AD9577 of  ADS7-V2EBZ  with oscilloscope, but sys_clk of AD9577 output  to FPGA  has nothing. but DDR3 clk of  AD9577  output  is 200MHz,80mv peak to peak. First I can confirm that the ADC's JESD204B PLL is locked and the refclk J3 of ADS7-V2EBZ is right,but I can not capture data from ace. When I use EVAL-AD9172 and ADS7-V2EBZ , I can get output data  of EVAL-AD9172. So I think when ADS7-V2EBZ  work with EVAL-AD9172 , the source data is directly generated by FPGA and transferd to DA by JESD204B, but When ADS7-V2EBZ  work with AD6688-3000EBZ, the data is already transferd to FPGA from AD, it is just not transfer from FPGA to DSP.The sys_clk of AD9577 of  ADS7-V2EBZ is maybe tranfer clk .

 

Thanks

Ping

  • 0
    •  Analog Employees 
    on Oct 16, 2017 2:41 PM

    Hi,

    Can you please provide screenshots? What exactly are you seeing as a problem?

    Thanks

    Umesh

  • Hi,

    When I click the button of run once, ACE will display as follow picture\

    And when I click the button of cancle , it will show that

    \

    The leds of ADS7-V2 show that as follow picture,why the DS5 and DS6 leds go off ?

    The next pictures are my hardware and sofware set up

    Thanks

    Ping

  • 0
    •  Analog Employees 
    on Oct 18, 2017 5:15 PM

    Hi,

    It seems DS5 and DS6 are not lit in your setup. Can you please make sure you are providing a valid REFCLK (based on the calculations in ACE) to J3 of the FPGA board? Can you also make sure that all the signal sources are locked to the same 10MHz reference? 

    Thanks

    Umesh

  • Hi,

    I want to know  what situations will cause DS5 and DS6 turn off. I  make sure I have  provided  a valid REFCLK (375MHz based on the calculations in ACE) to J3 of the FPGA board. As the 10MHz reference you mentioned, what is this? 

    Thanks

    Ping

  • 0
    •  Analog Employees 
    on Oct 21, 2017 2:38 PM

    Hi,

    The LEDs in the ADS7v2 are labeled DS1 - DS6. They indicate the following.

    1. Transceiver reference clock OK
    2. Transceiver recovered clock OK
    3. Transceiver reset sequence done
    4. JESD204 CGS done
    5. JESD204 ILAS done
    6. Capture FIFO full and ready to be read

    If DS5 and DS6 are off, then that means that the transceivers have not successfully captured the data from the ADC. In order for the frequencies to be accurate, every signal generator has a an internal reference, usually 10MHz, You can tie this reference such that one signal generator is the source and the others take the reference off of this signal generator. This way, the frequencies will be accurate. 

    Thanks

    Umesh