Gr.file_sink

GNU Radio
1

Hello!

I want to use the gr.file_sink function, but if connect to a USRP i
became
allways 15,3 MB big file.

But if i connect a sinus source, i became a much more bigger file. (
that’s
normal thing)

I want latter see my files with pylab but now, i can’t open.

I use the followed code:

class raw_data(gr.top_block):

def __init__(self):
    gr.top_block.__init__(self)


    usrp_decim = 16
    audio_decimation = 10
    self.IF_freq = 1e3

    self.u = usrp.source_c()
    adc_rate = self.u.adc_rate()                #" 64 MS/s "
    self.demod_rate = adc_rate / usrp_decim     #" sampling rate "
    self.u.set_decim_rate(usrp_decim)
    self.subdev = usrp.selected_subdev(self.u,

pick_subdevice(self.u))
self.u.tune(0, self.subdev,
self.IF_freq)
self.audio_rate = self.demod_rate / audio_decimation #"""
32kHz
“”"

    self.src = gr.sig_source_c(200, gr.GR_SIN_WAVE, 350, 0.1)
    self.fajl = gr.file_sink(gr.sizeof_gr_complex,

“/home/sdr/Desktop/data.txt”)

    self.connect(self.u, self.fajl)

if name == ‘main’:

try:
raw_data().run()
except KeyboardInterrupt:
raw_data().stop()
pass

What did I wrong?