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CWD phase noise

Is there any 4LO phase noise requirement in Continuous Wave Doppler ultrasound of AD9278 ?

Thanks.

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  • Thanks.

    1. Does ADI have document explain the relation between LO noise and these factors?
    2. If I want to test output referred SNR (-153 dBc/Hz) as datasheet setting (Test Conditions:−3 dBFS input, fRF = 2.5 MHz, f4LO = 10 MHz, 1 kHz offset). Does phase noise of 4LO affect test result?  How clean LO should use?

      3. Another question about AD9674 clock source. Do you have suggestion circuit (or IC ) that can suit for AD9674 sampling clock and CWD_LO requirement?

Reply
  • Thanks.

    1. Does ADI have document explain the relation between LO noise and these factors?
    2. If I want to test output referred SNR (-153 dBc/Hz) as datasheet setting (Test Conditions:−3 dBFS input, fRF = 2.5 MHz, f4LO = 10 MHz, 1 kHz offset). Does phase noise of 4LO affect test result?  How clean LO should use?

      3. Another question about AD9674 clock source. Do you have suggestion circuit (or IC ) that can suit for AD9674 sampling clock and CWD_LO requirement?

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