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Trouble with ADF6720 eval board, no  RF output ?

Question asked by ChrisIFO on Jul 6, 2017
Latest reply on Jul 28, 2017 by LKelly

Hi I' using an ADF6720 Eval board whith a AD-FMCDAQ2-EBZ board.

 

I've connected I and Q signals directly between the AD9144 DAC's outputs and the ADF6720 Inputs, because both circuits are with the same polarisation voltage 0.5V.

I and Q signals are delivered by the DAC, and applied to the ADF6720baseband Inputs but RF outpout remains off.

The only signaI that can see is the LO at a very low level -70dBm.

 

Is there any register to set On/Off the RF output ?

 

When I start the boards, the base band inputs remain at 0 volts until the DAC is activated, do you think this could destroy modulators ?

What is the max allowable voltage range on Base band input ? 

 

Thanks for your support

 

ChrisFO

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