Can you measure the current draw of the system?
matt Quoting Javs <[EMAIL PROTECTED]>: > > > > Matt, > > > > I tried the following and observed this: > > > > >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. > > > > Power supply and the Cypress chip(?) are a little higher than room > temperature. LED at 3Hz. > > > > >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. > > > > FPGA is warm. AD chips get warmer and so does the cypress chip. LED at 1hz. > And they do NOT get back to normal temp. > > > > >4 - Run a receive program (like usrp_fft). After a few minutes, >the AD > chip should be just slightly warm. > > > > Yes it is ! > > > > >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. > > > > At this stage when I run simultaneous Tx (siggen) and Rx (usrp_fft) programs, > the Codecs get pretty hot. To the extent that I cannot lay my fingure and > rest it for about 3-5 secs (burning sensation). The FPGA is slightly warm and > the FX2 stays somewhere between the codecs and FPGA. > > > > >6 - Quit the receive program. The chips shoul get much cooler now. > > >7 - quit the transmit program. Everything should return to room >temp. > > > > The temperature drops down a bit, but still hot(definitely NOT at room > temperature). I am concerned if there are any hidden processes going on in > the codecs even after I close the programs which are causing this heat? > > > > I understand that I am not using specific numbers to pinpoint the degree of > heat, but I hope I gave the picture. > > > > Thanks in advance. > > > > Javs > > > > > > --------------------------------- > Do you Yahoo!? > Make Yahoo! your home page _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
