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#!/usr/bin/env python
#
# Copyright 2005 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# GNU Radio is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
from gnuradio import gr, gru, blks, eng_notation
from gnuradio import audio
from gnuradio.eng_option import eng_option
from optparse import OptionParser
import sys
import math
class my_graph(gr.flow_graph):
def __init__(self, output_filename, tx_gain, nsamples):
gr.flow_graph.__init__(self)
audio_rate = 31250
baseband_rate = 250e3
src = gr.noise_source_f(gr.GR_GAUSSIAN, 1.0)
#src = gr.noise_source_f(gr.GR_GAUSSIAN, 0.5)
guts = blks.wfm_tx(self, audio_rate, baseband_rate)
amp = gr.multiply_const_cc(tx_gain)
head = gr.head(gr.sizeof_gr_complex, nsamples)
sink = gr.file_sink(gr.sizeof_gr_complex, output_filename)
self.connect(src, guts, amp, head, sink)
def main ():
usage = "usage: %prog [options] output_filename"
parser = OptionParser (option_class=eng_option, usage=usage)
parser.add_option("-N", "--nsamples", type="eng_float", default=250000,
help="specify number of output samples to generate[=250000]")
parser.add_option("-g", "--tx-gain", type="eng_float", default=1.0,
help="specify transmitter gain[=1]")
(options, args) = parser.parse_args ()
if len (args) != 1:
parser.print_help ()
sys.exit (1)
try:
my_graph(args[0], options.tx_gain, int(options.nsamples)).run()
except KeyboardInterrupt:
pass
if __name__ == '__main__':
main ()
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