ADRV9026HB EVM less

Hi,

We are using 13NLS JESD204B profile and have tested data path with LTE waveforms. Since, Balun match is from 2.8 - 6 GHz, I have tested at different frequencies. Please find the attachment of the same. 

EVM is observed less in this platform, while the same on previous platform AD9375 was giving  EVM appx. - 42 dB EVM. Any suggestions on it? TIA



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[edited by: rakshi at 4:54 AM (GMT -5) on 30 Jan 2021]
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  • +1
    •  Analog Employees 
    on Feb 1, 2021 5:18 AM 1 month ago

    Are you comparing the performance of AD9375 with ADRV9026?  The table that you have shared, is it for ADRV9026?

    You have a frequency error of KHz range in your plot. Make sure that the ref_clk source and the Rx input signal source are synchronized to each other with the external 10MHz source. 

    If the reference clock to ADRV9026 is not clean it impacts EVM.

    Are you measuring at ADRV9026 output or after PA ?

    Other thing to check is power supply noise.?

Reply
  • +1
    •  Analog Employees 
    on Feb 1, 2021 5:18 AM 1 month ago

    Are you comparing the performance of AD9375 with ADRV9026?  The table that you have shared, is it for ADRV9026?

    You have a frequency error of KHz range in your plot. Make sure that the ref_clk source and the Rx input signal source are synchronized to each other with the external 10MHz source. 

    If the reference clock to ADRV9026 is not clean it impacts EVM.

    Are you measuring at ADRV9026 output or after PA ?

    Other thing to check is power supply noise.?

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