def __init__(self, subdev_spec, audio_input): gr.hier_block2.__init__( self, "transmit_path", gr.io_signature(0, 0, 0), # Input signature gr.io_signature(0, 0, 0)) # Output signature self.u = usrp.sink_c() dac_rate = self.u.dac_rate() self.if_rate = 320e3 # 320 kS/s self.usrp_interp = int(dac_rate // self.if_rate) self.u.set_interp_rate(self.usrp_interp) self.sw_interp = 10 self.audio_rate = self.if_rate // self.sw_interp # 32 kS/s self.audio_gain = 10 self.normal_gain = 32000 self.audio = audio.source(int(self.audio_rate), audio_input) self.audio_amp = gr.multiply_const_ff(self.audio_gain) lpf = gr.firdes.low_pass( 1, # gain self.audio_rate, # sampling rate 3800, # low pass cutoff freq 300, # width of trans. band gr.firdes.WIN_HANN) # filter type hpf = gr.firdes.high_pass( 1, # gain self.audio_rate, # sampling rate 325, # low pass cutoff freq 50, # width of trans. band gr.firdes.WIN_HANN) # filter type audio_taps = convolve(array(lpf), array(hpf)) self.audio_filt = gr.fir_filter_fff(1, audio_taps) self.pl = blks2.ctcss_gen_f(self.audio_rate, 123.0) self.add_pl = gr.add_ff() self.connect(self.pl, (self.add_pl, 1)) self.fmtx = blks2.nbfm_tx(self.audio_rate, self.if_rate) self.amp = gr.multiply_const_cc(self.normal_gain) # determine the daughterboard subdevice we're using if subdev_spec is None: subdev_spec = usrp.pick_tx_subdevice(self.u) self.u.set_mux(usrp.determine_tx_mux_value(self.u, subdev_spec)) self.subdev = usrp.selected_subdev(self.u, subdev_spec) print "TX using", self.subdev.name() self.connect(self.audio, self.audio_amp, self.audio_filt, (self.add_pl, 0), self.fmtx, self.amp, self.u) self.set_gain(self.subdev.gain_range()[1]) # set max Tx gain
def __init__(self, subdev_spec, audio_input): gr.hier_block2.__init__( self, "transmit_path", gr.io_signature(0, 0, 0), gr.io_signature(0, 0, 0) # Input signature ) # Output signature self.u = usrp.sink_c() dac_rate = self.u.dac_rate() self.if_rate = 320e3 # 320 kS/s self.usrp_interp = int(dac_rate // self.if_rate) self.u.set_interp_rate(self.usrp_interp) self.sw_interp = 10 self.audio_rate = self.if_rate // self.sw_interp # 32 kS/s self.audio_gain = 10 self.normal_gain = 32000 self.audio = audio.source(int(self.audio_rate), audio_input) self.audio_amp = gr.multiply_const_ff(self.audio_gain) lpf = gr.firdes.low_pass( 1, # gain self.audio_rate, # sampling rate 3800, # low pass cutoff freq 300, # width of trans. band gr.firdes.WIN_HANN, ) # filter type hpf = gr.firdes.high_pass( 1, # gain self.audio_rate, # sampling rate 325, # low pass cutoff freq 50, # width of trans. band gr.firdes.WIN_HANN, ) # filter type audio_taps = convolve(array(lpf), array(hpf)) self.audio_filt = gr.fir_filter_fff(1, audio_taps) self.pl = blks2.ctcss_gen_f(self.audio_rate, 123.0) self.add_pl = gr.add_ff() self.connect(self.pl, (self.add_pl, 1)) self.fmtx = blks2.nbfm_tx(self.audio_rate, self.if_rate) self.amp = gr.multiply_const_cc(self.normal_gain) # determine the daughterboard subdevice we're using if subdev_spec is None: subdev_spec = usrp.pick_tx_subdevice(self.u) self.u.set_mux(usrp.determine_tx_mux_value(self.u, subdev_spec)) self.subdev = usrp.selected_subdev(self.u, subdev_spec) print "TX using", self.subdev.name() self.connect(self.audio, self.audio_amp, self.audio_filt, (self.add_pl, 0), self.fmtx, self.amp, self.u) self.set_gain(self.subdev.gain_range()[1]) # set max Tx gain
def __init__(self, args, spec, antenna, gain, audio_input): gr.hier_block2.__init__(self, "transmit_path", gr.io_signature(0, 0, 0), # Input signature gr.io_signature(0, 0, 0)) # Output signature self.u = uhd.usrp_sink(device_addr=args, stream_args=uhd.stream_args('fc32')) # Set the subdevice spec if(spec): self.u.set_subdev_spec(spec, 0) # Set the antenna if(antenna): self.u.set_antenna(antenna, 0) self.if_rate = 320e3 self.audio_rate = 32e3 self.u.set_samp_rate(self.if_rate) dev_rate = self.u.get_samp_rate() self.audio_gain = 10 self.normal_gain = 32000 self.audio = audio.source(int(self.audio_rate), audio_input) self.audio_amp = gr.multiply_const_ff(self.audio_gain) lpf = gr.firdes.low_pass (1, # gain self.audio_rate, # sampling rate 3800, # low pass cutoff freq 300, # width of trans. band gr.firdes.WIN_HANN) # filter type hpf = gr.firdes.high_pass (1, # gain self.audio_rate, # sampling rate 325, # low pass cutoff freq 50, # width of trans. band gr.firdes.WIN_HANN) # filter type audio_taps = convolve(array(lpf),array(hpf)) self.audio_filt = gr.fir_filter_fff(1,audio_taps) self.pl = blks2.ctcss_gen_f(self.audio_rate,123.0) self.add_pl = gr.add_ff() self.connect(self.pl,(self.add_pl,1)) self.fmtx = blks2.nbfm_tx(self.audio_rate, self.if_rate) self.amp = gr.multiply_const_cc (self.normal_gain) rrate = dev_rate / self.if_rate self.resamp = blks2.pfb_arb_resampler_ccf(rrate) self.connect(self.audio, self.audio_amp, self.audio_filt, (self.add_pl,0), self.fmtx, self.amp, self.resamp, self.u) if gain is None: # if no gain was specified, use the mid-point in dB g = self.u.get_gain_range() gain = float(g.start() + g.stop())/2.0 self.set_gain(gain) self.set_enable(False)