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Use ADF5355 as ext  LO in FMCOMMS5 

Question asked by Cafodm on Jun 28, 2018
Latest reply on Jun 29, 2018 by travisfcollins

Hello everyone:

I want to make the rf sync between the two ad9361 in fmcomms5.

so I correct the hardware bug in the board which version is REV.B following the guide :

AD-FMCOMMS5-EBZ Hardware [Analog Devices Wiki] 


and checked  the R and C states following the guide about External PLL :

FMComms5 Configuration Options [Analog Devices Wiki] 

C331 C332 is placed,and C390 is placed,C353 is unplaced.

I think if C353 is removed ,the C390 is no matter about the configuration.

I change my .dtb and BOOT.BIN from zynq-zc706-adv7511-ad9361-fmcomms5 to zynq-zc706-adv7511-ad9361-fmcomms5-ext-lo-adf5355.power on the board and use gnuradio in pc  to test the board.

It does not work. I give a 900.02MHz to RX, set the rx lo at 900MHz. 


Is there any other work should we do to make it work?