Repeating Gateware version mismatch problem

@Zack, any thoughts on this?

Hi @quentinmit,

Andrew is right. Usually it indicates power supply issues. You’ve listed 3 connection options. Have you tried to connect the board to USB3 using a normal USB3 cable when using external power supply (it looks like the last option, just not sure what you mean by active USB extension cable)?
We found that USB3 cables are not equal. The cheap ones usually cause issues. Hence make sure you have a good USB3 cable.

Hi @zack,

Our LimeSDR is connected via an active Corning Optical USB 3 cable. “Active” because the cable itself has a built-in hub to handle the distance. Our radio is mounted on a tower, so we can’t connect it directly using a normal passive USB3 cable.

Is there a procedure we can use to check the power rails? Does this usually manifest as a sag on one of the rails? We could bring an oscilloscope up and watch the power rails to confirm there are no sags.

Right between the USB plug & power jack is the test points for the LimeSDR USB power. I would think a decent VOM would do fine to test.

Ed