AUX I/O driving condition for USRP-2943R?

[thomas.lee]

Hello,

Does anyone knows the driving strength or load condition for USRP AUX I/O when it sets as general purpose output?

When I connect 1m cable onto the AUX I/O connector, it seems that load capacitance make 20MHz signal source to be mashed up.

but, I can't find any information from USRP documents.

Thanks in advance.

[muffin.vi]

Hi Thomas,

This KB has some more information: https://kb.ettus.com/X300/X310#Front_Panel_GPIO

Looks like you should source less than 5mA per pin.