Hi Claudio, Many thanks for your response. The issue was that I was trying to receive simultaneously 2 frequencies separated 400 MHz from each other while USRP's maximum instantaneous bandwidth was about 56 MHz only.
Kind regards, David El jue., 26 ene. 2023 15:02, <claudio.franch...@tlrnet.eu> escribió: > Hi, David, > > the USRP 2901 is a dual channel RTX, so it can definitely receive two > different channels at the same time, i.e. two different (carrier) > frequencies. We just have to see the management through GNURadio, but here > I refer to those who are more experienced than me with the software. > > In principle you can put a split downstream of the antenna and then go on > the two channel inputs, however keep in mind that with the splitter you > introduce a signal loss that can go from 3.5dB to 5dB or more, depending on > the splitter (3dB is anyway theoretical and unavoidable). This means that, > not only do you have the loss value of the splitter on the signal level, > but even more marked the fact that it worsens the noise figure by the same > amount. If the dynamics is enough it's fine, otherwise it would be better > to use separate antennas. Be careful not to go into transmission on a > channel if you use a splitter and a single antenna! > > > > Claudio > > > > *From:* discuss-gnuradio-bounces+claudio.franchini=tlrnet...@gnu.org > <discuss-gnuradio-bounces+claudio.franchini=tlrnet...@gnu.org> *On Behalf > Of *David Dima > *Sent:* Thursday, January 26, 2023 9:33 AM > *To:* discuss-gnuradio@gnu.org > *Subject:* Dual-Frequency simultaneously receiver using one USRP 2901 > > > > Hi, > > I am trying to simultaneously receive two signals from Galileo at > different frequencies (1176.45 MHz and 1575.42 MHz) using a single antenna, > a USRP 2901, and the GNU Radio Companion (GRC) software. I would like to > know if it is possible to do this with a single USRP, that is, is the USRP > able to receive two different frequencies at the same time? > > In the affirmative case, is it ok to just split the incoming signal from > the antenna with a splitter and connect it to two ports the USRP? > > Many thanks in advance, > > David >
