On Fri, May 25, 2007 at 10:15:25AM +0800, Lin HUANG wrote: > What are you doing to the boards?
> We are using the rfx2400s to make a 2*2 MIMO-OFDM platform. We also run > some > other programs like usrp-fft, spectrum sensing etc. to != with ;) > What are you connecting them to? > 2 common 2.4G antennas, not the PCB antennas from Ettus. > The story is like this: We use the platform everyday. Then in someday > morning or afternoon, we started the USRP and found they had no > responses?! > Nobody touched the boards during the period. And when we leave the lab, > we > always shut off the power of the boards. The enclosures are usually open > because we often plug in and out the daughterboard. At that time we are > always very careful. > > So we are very confused. What's the reason? Changing daughter boards while the power is applied could cause a problem. Not having the daughterboards seated properly on the stand offs could cause a problem. Dropping wires, connectors, tools or any other conductors onto the USRP could cause a problem. Writing your own verilog code could kill the main and/or daughterboard. Calling the u._write_oe method could kill the main and/or daughterboard. As far as I know, you are the only people who have been killing RFX-* boards, and you've managed to kill a lot of them. I suspect that someone in your lab is mistreating the boards somehow. Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
