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Re: Re: Question about ADF4159 Loop Bandwidth

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Hi rbrennan:

 

Thanks for your reply.

We also did some test about phase noise on ADF4159 EVB.

Base on ADF4159 datasheet, the Phase Noise of AD4159 at 100MHz should be below -160 dBc.
So far we measured Phase Noise at 100MHz is -153 dBc. Even at 100Hz is worse near 10 dBc.

(Please refer the attached files.)

Would you please check the PLL software setting any mistake to made the variation? or what kind of test conditions need special attention?

Thank you.


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