diff options
| author | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2008-01-19 19:16:31 +0000 |
|---|---|---|
| committer | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2008-01-19 19:16:31 +0000 |
| commit | d830a4547256be3096db83118f6e9ffe299f8ecf (patch) | |
| tree | aff290e911ce0350c9e56f6197538bed2d9dd496 /gnuradio-examples/python/usrp/test_dft_analysis.py | |
| parent | 0e47d4d37249d01d3b15684b95c941731c0505e4 (diff) | |
Fixes ticket:229. Fixed code in synthesis filterbank, restored test programs from limbo and upgraded to use blks2.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@7476 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'gnuradio-examples/python/usrp/test_dft_analysis.py')
| -rwxr-xr-x | gnuradio-examples/python/usrp/test_dft_analysis.py | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/gnuradio-examples/python/usrp/test_dft_analysis.py b/gnuradio-examples/python/usrp/test_dft_analysis.py new file mode 100755 index 0000000000..49db6bf2a7 --- /dev/null +++ b/gnuradio-examples/python/usrp/test_dft_analysis.py @@ -0,0 +1,72 @@ +#!/usr/bin/env python + +from gnuradio import gr, gru, blks2 +from gnuradio.wxgui import stdgui2, fftsink2, slider +from gnuradio.eng_option import eng_option +from optparse import OptionParser +import wx + +class test_graph (stdgui2.std_top_block): + def __init__(self, frame, panel, vbox, argv): + stdgui2.std_top_block.__init__(self, frame, panel, vbox, argv) + + parser = OptionParser (option_class=eng_option) + (options, args) = parser.parse_args () + + sample_rate = 16e3 + mpoints = 4 + ampl = 1000 + freq = 0 + + lo_freq = 1e6 + lo_ampl = 1 + + vbox.Add(slider.slider(panel, + -sample_rate/2, sample_rate/2, + self.set_lo_freq), 0, wx.ALIGN_CENTER) + + + src = gr.sig_source_c(sample_rate, gr.GR_CONST_WAVE, + freq, ampl, 0) + + self.lo = gr.sig_source_c(sample_rate, gr.GR_SIN_WAVE, + lo_freq, lo_ampl, 0) + + mixer = gr.multiply_cc() + self.connect(src, (mixer, 0)) + self.connect(self.lo, (mixer, 1)) + + # We add these throttle blocks so that this demo doesn't + # suck down all the CPU available. Normally you wouldn't use these. + thr = gr.throttle(gr.sizeof_gr_complex, sample_rate) + + taps = gr.firdes.low_pass(1, # gain + 1, # rate + 1.0/mpoints * 0.4, # cutoff + 1.0/mpoints * 0.1, # trans width + gr.firdes.WIN_HANN) + print len(taps) + analysis = blks2.analysis_filterbank(mpoints, taps) + + self.connect(mixer, thr) + self.connect(thr, analysis) + + for i in range(mpoints): + fft = fftsink2.fft_sink_c(frame, fft_size=128, + sample_rate=sample_rate/mpoints, + fft_rate=5, + title="Ch %d" % (i,)) + self.connect((analysis, i), fft) + vbox.Add(fft.win, 1, wx.EXPAND) + + def set_lo_freq(self, freq): + self.lo.set_frequency(freq) + + + +def main (): + app = stdgui2.stdapp (test_graph, "Test DFT filterbank") + app.MainLoop () + +if __name__ == '__main__': + main () |