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DAC38RF86EVM: Can't detect output of the DAC38RF86EVM

Part Number: DAC38RF86EVM

Hello.

I have a DAC38RF86EVM.I select On-chip PLL clock mode and its configuration is shown as the picture below.And then open HSDC Pro,select DAC38RF8x_LMF_841,Data Rate is 552.96MHz.Setting the frequency of the signal generator connected to SMA J4 to 1105.92MHz.The Pin1 and Pin2 of JP10 is open.I connect the SMA J7 to the oscilloscope,but can not dectect the output of the DAC38RF86EVM.And the TX clock on the TSW14J56EVM is blinking.Could you help me to solve this problem?

  • Hi,

    Please advise if you have followed the steps in 2.15, 2.16, and 2.17. Please double check if your spectrum analyzer is aligned with the right center frequency as your NCO setting. Please also press Reset DAC JESD Core and SYSREF trigger.

    I noticed on your GUI page pasted in the forum has "simulation" mode highlighted. This means your GUI is not connected to the EVM. Please double check all the test procedures highlighted in the EVM user's guide.

  • Thanks

    Because the DAC38RF8x → Digital(DAC A) tab of DAC38RFxx EVM GUI is hidden as shown in figure above so I don't set the NCO frequence.But after I set it,new problem have arisen.I set up the I/Q Multitone Generator to generate a single tone at "100 k"  follow the steps 2.1.6.And then I connected the SMA J7 to the oscilloscope ,but the wave captured by oscilloscope is not a sine wave as shown in figure below.That's why?please help me.Thanks.

  • Hi,

    the end result for 2.16 is a two tone output, one at 1960 and another at 2140. You will see an envelope of sinewave of 100MHz. Please check this with spectrum analyzer.

    -Kang

  • Thanks,

    I just want a perfect sine wave with a deterministic frequency ,not a envelope of sinewave.So could you teach me how to set it.

  • Hi,

    You do not need to use the output summer. You can just set the summing to only one path, instead of two paths. You will then get the sinewave.

    -Kang