Hello, I have a USRP with an RFX2400 mounted on the A side and a FLEX900 mounted on the B side. Everything works great UNTIL I connect the SMA jumpers from a TX/RX port on either board to the case. When the connection between the TX/RX ground and the case is made, a short occurs, the regulator gets very hot, and the voltage at the input jack drops to about 2V. Of course I disconnected the power as soon as I discovered what was happening. The board seems happy out of the case, or even in the case if the antenna port jumpers are not installed. I have to other units just like this one running with no problems, though one of them has a FLEX400 instead of a FLEX900.
So... any ideas where the short is? I inspected the case and USRP but didn't see anything telling, but there's a lot of tiny components and traces. Help? Thanks, Mike ----------------------------- Mike Weber * 703-668-4516 Network Engineer, BAE Systems _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
