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* Standard command line options
When building applications or examples, if your command has any of
these options, please use the following short and long names:
# General
parser = OptionParser(option_class=eng_option)
parser.add_option("-f", "--freq", type="eng_float", default=None,
help="set frequency to FREQ", metavar="FREQ")
parser.add_option("-g", "--gain", type="eng_float", default=None,
help="set gain in dB (default is midpoint)")
parser.add_option("-F", "--filename", type="string", default=None)
# Audio devices
parser.add_option("-I", "--audio-input", type=string, default="",
help="pcm input device name. E.g., hw:0,0 or /dev/dsp")
parser.add_option("-O", "--audio-output", type=string, default="",
help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
parser.add_option("-r", "--sample-rate", type="eng_float", default=48000,
help="set sample rate to RATE (48000)")
# USRP specific
parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=(0, 0),
help="select USRP Rx side A or B (default=A)")
parser.add_option("-T", "--tx-subdev-spec", type="subdev", default=(0, 0),
help="select USRP Tx side A or B (default=A)")
parser.add_option("-d", "--decim", type="int", default=16,
help="set fgpa decimation rate to DECIM (default=16)")
parser.add_option("-i", "--interp", type="int", default=32,
help="set fgpa interpolation rate to INTERP (default=32)")
parser.add_option("-n", "--nchannels", type=intx, default=1,
help="set number of channels to NCHANNELS (default=1)")
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