def __init__(self, options, args, queue): gr.top_block.__init__(self) self.options = options self.args = args self.u = usrp.source_c(which=0, decim_rate=self.options.decim) if self.options.rx_subdev_spec is None: self.options.rx_subdev_spec = pick_subdevice(self.u) self.u.set_mux(usrp.determine_rx_mux_value(self.u, self.options.rx_subdev_spec)) self.subdev = usrp.selected_subdev(self.u, self.options.rx_subdev_spec) if options.gain is None: # Select a gain in the middle of the range g = self.subdev.gain_range() options.gain = float(g[0]+g[1])/2 self.subdev.set_gain(options.gain) r = self.u.tune(0, self.subdev, options.freq) if_rate = self.u.adc_freq() / self.u.decim_rate() self.mode_s = ppm_demod(if_rate, options.thresh) pass_all = 0 if options.output_all: pass_all = 1 self.format = air.ms_fmt_log(pass_all, queue) self.connect(self.u, self.mode_s, self.format)
def __init__(self, options, args, queue): gr.top_block.__init__(self) self.options = options self.args = args samp_rate = 10e6 self.u = uhd.usrp_source( device_addr="", io_type=uhd.io_type.COMPLEX_FLOAT32, num_channels=1, ) self.u.set_samp_rate(samp_rate) self.u.set_antenna("RX2", 0) #self.u = usrp.source_c(which=0, decim_rate=self.options.decim) #if self.options.rx_subdev_spec is None: # self.options.rx_subdev_spec = pick_subdevice(self.u) #self.subdev = usrp.selected_subdev(self.u, self.options.rx_subdev_spec) if options.gain is None: # Select a gain in the middle of the range g = self.u.get_gain_range() options.gain = float(g.start()+g.stop())/2 self.u.set_gain(options.gain) print "Gain set to: ", self.u.get_gain() self.u.set_bandwidth(100000) self.u.set_center_freq(options.freq,0) #if_rate = self.u.adc_freq() / self.u.decim_rate() if_rate = self.u.get_samp_rate() self.mode_s = ppm_demod(if_rate, options.thresh) pass_all = 0 if options.output_all: pass_all = 1 self.format = air.ms_fmt_log(pass_all, queue) self.connect(self.u, self.mode_s, self.format)