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# This file is part of pyrlsdr.
# Copyright (C) 2013 by Roger <https://github.com/roger-/pyrtlsdr>
#
# pyrlsdr 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 3 of the License, or
# (at your option) any later version.
# pyrlsdr 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 pyrlsdr. If not, see <http://www.gnu.org/licenses/>.
from __future__ import division
from __future__ import print_function
from rtlsdr import *
def main():
@limit_calls(2)
def test_callback(samples, rtlsdr_obj):
print(' in callback')
print(' signal mean:', sum(samples)/len(samples))
sdr = RtlSdr()
print('Configuring SDR...')
sdr.rs = 2.4e6
sdr.fc = 100e6
sdr.gain = 10
print(' sample rate: %0.6f MHz' % (sdr.rs/1e6))
print(' center frequency %0.6f MHz' % (sdr.fc/1e6))
print(' gain: %d dB' % sdr.gain)
print('Reading samples...')
samples = sdr.read_samples(256*1024)
print(' signal mean:', sum(samples)/len(samples))
print('Testing callback...')
sdr.read_samples_async(test_callback, 256*1024)
try:
import pylab as mpl
print('Testing spectrum plotting...')
mpl.figure()
mpl.psd(samples, NFFT=1024, Fc=sdr.fc/1e6, Fs=sdr.rs/1e6)
mpl.show()
except:
# matplotlib not installed/working
pass
print('Done\n')
sdr.close()
if __name__ == '__main__':
main()