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Configure SYSREF in HMC7044 via GUI

Question asked by Phil.G on Mar 31, 2017
Latest reply on Apr 17, 2017 by Phil.G

Hi,

 

I am attempting to use the GUI to program the HMC7044 SCLKout3 to act as a SYSREF.  I am trying out the configuration on the evaluation board via the GUI prior to using it on my custom board via FPGA SPI programming.

 

The following screen clipping is what I used for my test scenario. 

My understanding is that SCLKout3 should come up at 1/2280 the frequency of CLKout2. Instead, it comes up at the same frequency as CLKout2.

I have tried varying the divider for SCLKout3 and will sometime see a change in the output and other times will see no change.  Is there a robust procedure that I should follow to ensure that changes in the GUI result in changes in the HMC7044 configuration?

Is there anything obviously wrong in my configuration?

 

Thank you for your help.

 

BR,

Phil

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