Quoting Javs <[EMAIL PROTECTED]>: > Dear all, > > The Analog Device chips on my USRP (and to some extent the FPGA) seem to be > heating more than usual now. On a touch basis, I observed that they are much > heated (burning sensation) than they were before. I've been using it for > about 40 days now. I haven't done anything unusual with it. However, it seems > to be running the software perfectly the way it should. Am I the only one who > is experiencing this ? I am thinking of a fan to cool the chips to avoid > burning them. Any suggestions ?
During normal operation, the AD chips can get pretty warm. Try this: 1 - Take off all daughterboards. 2 - Plug in the the USRP. Do not run any software. Leave it for a few minutes. Every chip other than the power supply on there should be at room temp. The LED should be flashing about 2-3 times per second. 3 - Run some of the examples, and quit them normally (no ctrl-C). A few minutes later the FPGA and AD chips should be back to room temp. The LED should be flashing slower. 4 - Run a receive program (like usrp_fft). After a few minutes, the AD chip should be just slightly warm. 5 - Leave the receive program running. In another window start up a transmit program (like usrp_siggen). The codec chips should get pretty hot, but not painfully hot. The FPGA should only show the slightest hint of warmness. 6 - Quit the receive program. The chips shoul get much cooler now. 7 - quit the transmit program. Everything should return to room temp. Let me know if your experience matches what I outlined above. Matt _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
