On Wed, Mar 16, 2011 at 1:07 AM, Marcus D. Leech <mle...@ripnet.com> wrote: >> Dear all, >> >> What is the lowest power of the signal that LFRX can receive? >> >> Really appreciate any of your help >> >> Yan >> > The LFRX has almost no gain, so you're limited by the noise floor of the > ADC. In the USRP2, you can probably reliably detect > signals down to about -60dBm or so. In the USRP1, you need somewhat more > signal, about -50dBm or so. But those are > ballpark numbers. But it depends on the details, and what kind of signals > you're trying to detect, and whether you want to > demodulate them, or merely detect their presence, etc.
Using a signal generator I could measure the "CW sensitivity" down to about -90 dBm. Using a 2 kHz filter this produced a tone clear enough for me to decode morse code. With a tuned vertical antenna ~10 meters long, I get very good reception of AM broadcasting and ham radio traffic around 7 MHz. I was using USRP1. Alex _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
