Exemplo n.º 1
0
    def _create_controls(self):
        self._freq_ax = plt.axes([0.2, 0.19, 0.2, 0.03])
        self._freq_slider = Slider(self._freq_ax,
                                   'Frequency',
                                   0,
                                   self.samplerate / 2.0,
                                   valinit = self.frequency)
        self._freq_slider.on_changed(self.set_signal_frequency)

        self._ampl_ax = plt.axes([0.2, 0.1, 0.2, 0.03])
        self._ampl_slider = Slider(self._ampl_ax,
                                   'Amplitude',
                                   -100,
                                   0,
                                   valinit = dcv.lin2db(self.amplitude))
        self._ampl_slider.on_changed(self.set_signal_amplitude)

        self._signaltype_ax = plt.axes([0.5, 0.05, 0.15, 0.20])
        self._signaltype_radio = RadioButtons(self._signaltype_ax,
                                              ('Sine', 'Square', 'Sawtooth',
                                               'Triangle', 'Noise', 'Constant'))
        self._signaltype_radio.on_clicked(self.set_signal_type)

        self._windowtype_ax = plt.axes([0.7, 0.05, 0.15, 0.20])
        self._windowtype_radio = RadioButtons(self._windowtype_ax,
                                              ('Flat', 'Hanning', 'Hamming', 'Blackman'))
        self._windowtype_radio.on_clicked(self.set_window_type)
Exemplo n.º 2
0
def amplitude_response(spec_real, spec_imag, db=True):
    size = len(spec_real)
    amp = [0] * size
    for i in range(0, size):
        amp[i] = dcx.modulus(spec_real[i], spec_imag[i]) / (size/2)
        if db:
            amp[i] = dcv.lin2db(amp[i])
    return amp
Exemplo n.º 3
0
 def test_one(self):
     self.assertEqual(dc.lin2db(1.0), 0.0)
Exemplo n.º 4
0
 def test_min_limit(self):
     self.assertEqual(dc.lin2db(1e-5), -100.0)
Exemplo n.º 5
0
 def test_minus_inf(self):
     self.assertEqual(dc.lin2db(1e-10), -100.0)