Warning- TX PLL not locked, Please double check hardware setup

Question

I am using the Avnet RFSOC Explorer for MATLAB to interface with ZCU208+DTRX2. I am following the setup instruction. Whenever I click the TX Power UP, I get the error "Warning- TX PLL not locked, Please double check hardware setup". I am not sure what I am doing wrong as I have verified that I am outputting 122.88 MHz ref from CLK104 module. Any ideas?

mbrown · Accepted Answer

We also see the DTRX2 PLL fail to lock when the external 12V power supply is current limited. 
 Can you verify that your external supply is capable of delivering >2A? 
 In practice, if you can deliver 1A to the board you can power up the TX chain OR the RX chain, but not both.

johnj0806 · Answer

The board was replaced and the problem was fixed. Thank you.

Warning- TX PLL not locked, Please double check hardware setup

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