I'm examining a GNU Radio Lab material: Blad, Olofsson - 2011 - Software-Defined Radio Lab 1 Getting in Touch with GNU Radio and the USRP<http://dl.dropbox.com/u/11382666/Blad%2C%20Olofsson%20-%202011%20-%20Software-Defined%20Radio%20Lab%201%20Getting%20in%20Touch%20with%20GNU%20Radio%20and%20the%20USRP.pdf>
This uses LFRX/LFTX daughterboards and the following codes for transmitting a signal (assume all variables are set correctly): from gnuradio import usrp # ... blahblah subdev_spec = (0,0) subdev = self.u.selected_subdev(subdev_spec) self.u.set_mux(self.u.determine_tx_mux_value(subdev_spec)) self.u.tune(0, subdev, carrier) subdev.set_gain(0) Currently, however, I wanted to modify this codes for a RFX2400 daughterboard, and when I use that codes without any changes, it doesn't work I cannot see anything but noise with usrp_fft.py. Thus, I changed the codes with the following: from grc_gnuradio import usrp as grc_usrp # ... blahblah self.usrp_simple_sink_x_0 = grc_usrp.simple_sink_c(which=0, side="A") self.usrp_simple_sink_x_0.set_interp_rate(500) self.usrp_simple_sink_x_0.set_frequency(2.412*(10**9), verbose=False) self.usrp_simple_sink_x_0.set_gain(0) self.usrp_simple_sink_x_0.set_enable(True) self.usrp_simple_sink_x_0.set_auto_tr(True) And then it finally works fine. Is there any difference between using usrp in gnuradio and usrp in grc_gnuradio ? And the former code is only working for LFRX/LFTX ? and the latter one is working for other ones? -- Seokseong Jeon, PhD Candidate Communication & Networks Lab IT Convergence Engineering (ITCE), POSTECH, Korea +82 10 8338 1229, gee.songsong at gmail . com
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