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#!/usr/bin/env python
from gnuradio import gr
from gnuradio import usrp
from gnuradio import eng_notation
from gnuradio.eng_option import eng_option
from optparse import OptionParser
def build_graph ():
# interp = 32
interp = 64
nchan = 2
if nchan == 1:
mux = 0x0098
#mux = 0x9800
else:
mux = 0xba98
f0 = 100e3
a0 = 16e3
duc0 = 5e6
f1 = 50e3
a1 = 16e3
duc1 = 7e6
fg = gr.flow_graph ()
u = usrp.sink_c (0, interp, nchan, mux)
sample_rate = u.dac_freq () / interp
print "sample_rate = ", eng_notation.num_to_str (sample_rate)
print "usb_sample_rate = ", eng_notation.num_to_str (sample_rate * nchan)
u.set_tx_freq (0, duc0)
u.set_tx_freq (1, duc1)
interleave = gr.interleave (gr.sizeof_gr_complex)
fg.connect (interleave, u)
src0 = gr.sig_source_c (sample_rate, gr.GR_SIN_WAVE, f0, a0, 0)
fg.connect (src0, (interleave, 0))
if nchan == 2:
if 1:
src1 = gr.sig_source_c (sample_rate, gr.GR_SIN_WAVE, f1, a1, 0)
else:
src1 = gr.noise_source_c (gr.GR_UNIFORM, a1)
fg.connect (src1, (interleave, 1))
return fg
if __name__ == '__main__':
fg = build_graph ()
fg.start ()
raw_input ('Press Enter to quit: ')
fg.stop ()
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