#!/usr/bin/env python ################################################## # Gnuradio Python Flow Graph # Title: Three FM Modulators, spaced 30Khz # Generated: Tue Jun 21 19:44:45 2011 ################################################## from gnuradio import audio from gnuradio import eng_notation from gnuradio import gr from gnuradio import window from gnuradio.eng_option import eng_option from gnuradio.gr import firdes from gnuradio.wxgui import fftsink2 from grc_gnuradio import wxgui as grc_wxgui from optparse import OptionParser import wx class three_fm_modulators(grc_wxgui.top_block_gui): def __init__(self): grc_wxgui.top_block_gui.__init__(self, title="Three FM Modulators, spaced 30Khz") _icon_path = "/usr/share/icons/hicolor/32x32/apps/gnuradio-grc.png" self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY)) ################################################## # Variables ################################################## self.samp_rate = samp_rate = 200000 ################################################## # Blocks ################################################## self.wxgui_fftsink2_0 = fftsink2.fft_sink_c( self.GetWin(), baseband_freq=0, y_per_div=10, y_divs=10, ref_level=50, ref_scale=2.0, sample_rate=samp_rate, fft_size=1024, fft_rate=5, average=True, avg_alpha=0.250, title="FFT Plot", peak_hold=False, ) self.Add(self.wxgui_fftsink2_0.win) self.gr_sig_source_x_0_0 = gr.sig_source_c(samp_rate, gr.GR_COS_WAVE, int(30e3), 1, 0) self.gr_sig_source_x_0 = gr.sig_source_c(samp_rate, gr.GR_COS_WAVE, int(-30e3), 1, 0) self.gr_multiply_xx_0_0 = gr.multiply_vcc(1) self.gr_multiply_xx_0 = gr.multiply_vcc(1) self.gr_frequency_modulator_fc_0_1 = gr.frequency_modulator_fc(0.3) self.gr_frequency_modulator_fc_0_0 = gr.frequency_modulator_fc(0.3) self.gr_frequency_modulator_fc_0 = gr.frequency_modulator_fc(0.3) self.gr_fractional_interpolator_xx_0 = gr.fractional_interpolator_ff(0, 1.0/(samp_rate/48e3)) self.gr_add_xx_0 = gr.add_vcc(1) self.audio_source_0 = audio.source(48000, "hw:2,0", True) ################################################## # Connections ################################################## self.connect((self.gr_sig_source_x_0, 0), (self.gr_multiply_xx_0, 0)) self.connect((self.gr_sig_source_x_0_0, 0), (self.gr_multiply_xx_0_0, 1)) self.connect((self.gr_multiply_xx_0_0, 0), (self.gr_add_xx_0, 2)) self.connect((self.gr_multiply_xx_0, 0), (self.gr_add_xx_0, 0)) self.connect((self.gr_add_xx_0, 0), (self.wxgui_fftsink2_0, 0)) self.connect((self.audio_source_0, 0), (self.gr_fractional_interpolator_xx_0, 0)) self.connect((self.gr_fractional_interpolator_xx_0, 0), (self.gr_frequency_modulator_fc_0_0, 0)) self.connect((self.gr_fractional_interpolator_xx_0, 0), (self.gr_frequency_modulator_fc_0, 0)) self.connect((self.gr_fractional_interpolator_xx_0, 0), (self.gr_frequency_modulator_fc_0_1, 0)) self.connect((self.gr_frequency_modulator_fc_0_0, 0), (self.gr_multiply_xx_0, 1)) self.connect((self.gr_frequency_modulator_fc_0, 0), (self.gr_add_xx_0, 1)) self.connect((self.gr_frequency_modulator_fc_0_1, 0), (self.gr_multiply_xx_0_0, 0)) def get_samp_rate(self): return self.samp_rate def set_samp_rate(self, samp_rate): self.samp_rate = samp_rate self.gr_sig_source_x_0.set_sampling_freq(self.samp_rate) self.gr_sig_source_x_0_0.set_sampling_freq(self.samp_rate) self.wxgui_fftsink2_0.set_sample_rate(self.samp_rate) self.gr_fractional_interpolator_xx_0.set_interp_ratio(1.0/(self.samp_rate/48e3)) if __name__ == '__main__': parser = OptionParser(option_class=eng_option, usage="%prog: [options]") (options, args) = parser.parse_args() tb = three_fm_modulators() tb.Run(True)