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RX phase noise measurements

Question asked by MarkusH on Nov 14, 2013
Latest reply on Nov 18, 2013 by tlili

Hello,

 

we want to use the AD9361 chip on a ranging application based on carrier phase measurement, so phase noise is a critical parameter for us. At the moment we use the B210 board from ettus research. I am interested in the phase noise profile of the RX LO and the ADC clock. For the ADC clock I can use the clk_out pin, but for the RX LO I can not find a pin were it comes out of the package. Is there any possibility to get to this signal?

One idea is us the TX LO and measure the phase noise profile of the output signal, but this only works if the RX LO and TX LO have the same parameter, and the modulator does not add any additional noise.

 

Regards, Markus

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