def __init__(self, center_freq, offset_freq, decimate_am=1, play_audio=False):
"""Configure the RTL-SDR and GNU Radio"""
super(rtlsdr_am_stream, self).__init__()
audio_rate = 44100
device_rate = audio_rate * 25
output_rate = audio_rate / float(decimate_am)
self.rate = output_rate
self.osmosdr_source = osmosdr.source("")
self.osmosdr_source.set_center_freq(freq)
self.osmosdr_source.set_sample_rate(device_rate)
taps = firdes.low_pass(1, device_rate, 40000, 5000, firdes.WIN_HAMMING, 6.76)
self.freq_filter = filter_swig.freq_xlating_fir_filter_ccc(25, taps, -freq_offs, device_rate)
#self.am_demod_self = blks2.am_demod_cf(
self.am_demod_self = am_demod.am_demod_cf(
channel_rate=audio_rate,
audio_decim=1,
audio_pass=5000,
audio_stop=5500,
)
self.resampler = rational_resampler.rational_resampler_fff(
interpolation=1,
decimation=decimate_am,
)
self.sink = gr_queue.queue_sink_f()
self.connect(self.osmosdr_source, self.freq_filter, self.am_demod_self)
self.connect(self.am_demod_self, self.resampler, self.sink)
if play_audio:
self.audio_sink = audio.sink(audio_rate, "", True)
self.connect(self.am_demod_self, self.audio_sink)
def __init__(self, center_freq, offset_freq, decimate_am=1, play_audio=False):
"""Configure the RTL-SDR and GNU Radio"""
super(rtlsdr_am_stream, self).__init__()
audio_rate = 44100
device_rate = audio_rate * 25
output_rate = audio_rate / float(decimate_am)
self.rate = output_rate
self.osmosdr_source = osmosdr.source_c("")
self.osmosdr_source.set_center_freq(freq)
self.osmosdr_source.set_sample_rate(device_rate)
taps = firdes.low_pass(1, device_rate, 40000, 5000, firdes.WIN_HAMMING, 6.76)
self.freq_filter = gr.freq_xlating_fir_filter_ccc(25, taps, -freq_offs, device_rate)
self.am_demod = blks2.am_demod_cf(
channel_rate=audio_rate,
audio_decim=1,
audio_pass=5000,
audio_stop=5500,
)
self.resampler = blks2.rational_resampler_fff(
interpolation=1,
decimation=decimate_am,
)
self.sink = gr_queue.queue_sink_f()
self.connect(self.osmosdr_source, self.freq_filter, self.am_demod)
self.connect(self.am_demod, self.resampler, self.sink)
if play_audio:
self.audio_sink = audio.sink(audio_rate, "", True)
self.connect(self.am_demod, self.audio_sink)
def __init__(self, center_freq, offset_freq, decimate_am=1):
"""Configure the RTL-SDR and GNU Radio"""
super(rtlsdr_am_stream, self).__init__()
audio_rate = 48000
device_rate = audio_rate * 25
output_rate = audio_rate / float(decimate_am)
self.rate = output_rate
# self.osmosdr_source = osmosdr.source_c("")
self.osmosdr_source = osmosdr.source("")
self.osmosdr_source.set_sample_rate(device_rate)
self.osmosdr_source.set_center_freq(freq)
self.osmosdr_source.set_freq_corr(0, 0)
#self.osmosdr_source.set_gain_mode(1, 0)
self.osmosdr_source.set_gain_mode(True, 0)
self.osmosdr_source.set_gain(20, 0)
taps = firdes.low_pass(1, device_rate, 40000, 5000, firdes.WIN_HAMMING, 6.76)
#self.freq_filter = gr.freq_xlating_fir_filter_ccc(25, taps, -freq_offs, device_rate)
self.freq_filter = filter.freq_xlating_fir_filter_ccc(25, taps, -freq_offs, device_rate)
self.am_demod = analog.am_demod_cf(
channel_rate=audio_rate,
audio_decim=1,
audio_pass=5000,
audio_stop=5500,
)
self.resampler = filter.rational_resampler_fff(
interpolation=1,
decimation=decimate_am,
)
self.sink = gr_queue.queue_sink_f()
self.connect(self.osmosdr_source, self.freq_filter, self.am_demod)
self.connect(self.am_demod, self.resampler, self.sink)
def __init__(self):
gr.top_block.__init__(self, "Key")
# super(Key, self).__init__()
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 2016000 #1920000#2000000
self.offset_freq_keyboard = offset_freq_keyboard = 27195000
self.offset_freq = offset_freq = 27175000
self.center_freq = center_freq = 28000000
self.target_rate = target_rate = 48000#16000#96000
self.offset_keyboard = offset_keyboard = offset_freq_keyboard - center_freq
self.offset = offset = offset_freq - center_freq
#self.firdes_tap_overall = firdes_tap_overall = firdes.low_pass(1, samp_rate, 50000, 0100, firdes.WIN_HAMMING,
# 6.76)
self.firdes_tap_keyboard = firdes_tap_keyboard = firdes.low_pass(1, samp_rate, 20000, 0100,#5000, 5000, #20000, 10000,
firdes.WIN_HAMMING,
6.76)
##################################################
# Blocks
##################################################
self.osmosdr_source_c_0 = osmosdr.source_c(args="nchan=" + str(1) + " " + "")
self.osmosdr_source_c_0.set_sample_rate(samp_rate)
self.osmosdr_source_c_0.set_center_freq(center_freq, 0)
self.osmosdr_source_c_0.set_freq_corr(0, 0)
self.osmosdr_source_c_0.set_dc_offset_mode(1, 0)
self.osmosdr_source_c_0.set_iq_balance_mode(0, 0)
self.osmosdr_source_c_0.set_gain_mode(0, 0)
self.osmosdr_source_c_0.set_gain(01, 0)
self.osmosdr_source_c_0.set_if_gain(20, 0)
self.osmosdr_source_c_0.set_bb_gain(20, 0)
self.osmosdr_source_c_0.set_antenna("", 0)
self.osmosdr_source_c_0.set_bandwidth(0, 0)
self.low_pass_filter_0 = gr.fir_filter_fff(1, firdes.low_pass(
1, target_rate, 5e3, 01e3, firdes.WIN_HAMMING, 6.76))
self.freq_xlating_fir_filter_xxx_0_0 = filter.freq_xlating_fir_filter_ccc(int(samp_rate / target_rate),
(firdes_tap_keyboard),
offset_keyboard, samp_rate)
self.blocks_wavfile_sink_0 = blocks.wavfile_sink("/root/sdr/keyboard/44.1Ks_27Mf_quad3_keyboard.wav", 1,
target_rate, 8)
#ACL
#self.blocks_file_source_0 = blocks.file_source(gr.sizeof_float * 1, "/root/sdr/keyboard/96k_27M_float", False)
#self.blocks_file_sink_2 = blocks.file_sink(gr.sizeof_float * 1, "/root/sdr/keyboard/96k_27M_float")
#self.blocks_file_sink_2.set_unbuffered(False)
self.sink = gr_queue.queue_sink_f()
self.analog_simple_squelch_cc_0 = analog.simple_squelch_cc(-5, 1)
self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf(2)
##################################################
# Connections
##################################################
self.connect((self.osmosdr_source_c_0, 0), (self.freq_xlating_fir_filter_xxx_0_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0_0, 0), (self.analog_simple_squelch_cc_0, 0))
self.connect((self.analog_simple_squelch_cc_0, 0), (self.analog_quadrature_demod_cf_0, 0))
self.connect((self.analog_quadrature_demod_cf_0, 0), (self.low_pass_filter_0, 0))
self.connect((self.low_pass_filter_0, 0), (self.blocks_wavfile_sink_0, 0))
self.connect((self.low_pass_filter_0, 0), self.sink)