/
intensity_interferometer.py
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/
intensity_interferometer.py
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#!/usr/bin/env python
##################################################
# Gnuradio Python Flow Graph
# Title: Intensity Interferometer
# Generated: Wed Mar 19 20:41:17 2014
##################################################
from gnuradio import analog
from gnuradio import blocks
from gnuradio import eng_notation
from gnuradio import filter
from gnuradio import gr
from gnuradio import window
from gnuradio.eng_option import eng_option
from gnuradio.gr import firdes
from gnuradio.wxgui import fftsink2
from gnuradio.wxgui import forms
from gnuradio.wxgui import scopesink2
from grc_gnuradio import wxgui as grc_wxgui
from optparse import OptionParser
import wx
class intensity_interferometer(grc_wxgui.top_block_gui):
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Intensity Interferometer")
_icon_path = "/usr/share/icons/hicolor/32x32/apps/gnuradio-grc.png"
self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY))
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 250e3
self.magnitude = magnitude = 0.05
self.integ = integ = 1
self.beat = beat = 1
##################################################
# Blocks
##################################################
_magnitude_sizer = wx.BoxSizer(wx.VERTICAL)
self._magnitude_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_magnitude_sizer,
value=self.magnitude,
callback=self.set_magnitude,
label="Magnitude",
converter=forms.float_converter(),
proportion=0,
)
self._magnitude_slider = forms.slider(
parent=self.GetWin(),
sizer=_magnitude_sizer,
value=self.magnitude,
callback=self.set_magnitude,
minimum=0.05,
maximum=0.5,
num_steps=100,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_magnitude_sizer)
_integ_sizer = wx.BoxSizer(wx.VERTICAL)
self._integ_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_integ_sizer,
value=self.integ,
callback=self.set_integ,
label="Integration Time (Sec)",
converter=forms.float_converter(),
proportion=0,
)
self._integ_slider = forms.slider(
parent=self.GetWin(),
sizer=_integ_sizer,
value=self.integ,
callback=self.set_integ,
minimum=1,
maximum=30,
num_steps=100,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_integ_sizer)
_beat_sizer = wx.BoxSizer(wx.VERTICAL)
self._beat_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_beat_sizer,
value=self.beat,
callback=self.set_beat,
label="Beat Frequency (kHz)",
converter=forms.float_converter(),
proportion=0,
)
self._beat_slider = forms.slider(
parent=self.GetWin(),
sizer=_beat_sizer,
value=self.beat,
callback=self.set_beat,
minimum=1,
maximum=10,
num_steps=100,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_beat_sizer)
self.wxgui_scopesink2_0 = scopesink2.scope_sink_f(
self.GetWin(),
title="2nd detector power level",
sample_rate=2,
v_scale=0,
v_offset=0,
t_scale=450,
ac_couple=False,
xy_mode=False,
num_inputs=1,
trig_mode=gr.gr_TRIG_MODE_STRIPCHART,
y_axis_label="Counts",
)
self.Add(self.wxgui_scopesink2_0.win)
self.wxgui_fftsink2_0 = fftsink2.fft_sink_f(
self.GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=samp_rate/10,
fft_size=1024,
fft_rate=8,
average=True,
avg_alpha=0.1,
title="First Detector Spectrum",
peak_hold=False,
)
self.Add(self.wxgui_fftsink2_0.win)
self.single_pole_iir_filter_xx_0 = filter.single_pole_iir_filter_ff(1.0/((samp_rate/10)*integ), 1)
self.low_pass_filter_0 = gr.fir_filter_fff(int(samp_rate/25e3), firdes.low_pass(
1, samp_rate, 11e3, 2.5e3, firdes.WIN_HAMMING, 6.76))
self.blocks_throttle_0 = blocks.throttle(gr.sizeof_float*1, samp_rate)
self.blocks_multiply_xx_0 = blocks.multiply_vff(1)
self.blocks_keep_one_in_n_0 = blocks.keep_one_in_n(gr.sizeof_float*1, int(samp_rate/20))
self.blocks_complex_to_mag_squared_0 = blocks.complex_to_mag_squared(1)
self.blocks_add_xx_0 = blocks.add_vcc(1)
self.band_pass_filter_0 = gr.fir_filter_fff(1, firdes.band_pass(
1, samp_rate/10, (beat*1000)-100, (beat*1000)+100, 50, firdes.WIN_HAMMING, 6.76))
self.analog_sig_source_x_0_0 = analog.sig_source_c(samp_rate, analog.GR_COS_WAVE, 122e3, magnitude, 0)
self.analog_sig_source_x_0 = analog.sig_source_c(samp_rate, analog.GR_COS_WAVE, 122e3-(beat*1000), magnitude, 0)
self.analog_noise_source_x_0 = analog.noise_source_c(analog.GR_GAUSSIAN, 0.2, 0)
##################################################
# Connections
##################################################
self.connect((self.analog_noise_source_x_0, 0), (self.blocks_add_xx_0, 2))
self.connect((self.analog_sig_source_x_0_0, 0), (self.blocks_add_xx_0, 1))
self.connect((self.analog_sig_source_x_0, 0), (self.blocks_add_xx_0, 0))
self.connect((self.blocks_add_xx_0, 0), (self.blocks_complex_to_mag_squared_0, 0))
self.connect((self.blocks_complex_to_mag_squared_0, 0), (self.blocks_throttle_0, 0))
self.connect((self.low_pass_filter_0, 0), (self.band_pass_filter_0, 0))
self.connect((self.blocks_throttle_0, 0), (self.low_pass_filter_0, 0))
self.connect((self.band_pass_filter_0, 0), (self.blocks_multiply_xx_0, 0))
self.connect((self.band_pass_filter_0, 0), (self.blocks_multiply_xx_0, 1))
self.connect((self.low_pass_filter_0, 0), (self.wxgui_fftsink2_0, 0))
self.connect((self.blocks_multiply_xx_0, 0), (self.single_pole_iir_filter_xx_0, 0))
self.connect((self.blocks_keep_one_in_n_0, 0), (self.wxgui_scopesink2_0, 0))
self.connect((self.single_pole_iir_filter_xx_0, 0), (self.blocks_keep_one_in_n_0, 0))
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, 11e3, 2.5e3, firdes.WIN_HAMMING, 6.76))
self.blocks_throttle_0.set_sample_rate(self.samp_rate)
self.blocks_keep_one_in_n_0.set_n(int(self.samp_rate/20))
self.single_pole_iir_filter_xx_0.set_taps(1.0/((self.samp_rate/10)*self.integ))
self.band_pass_filter_0.set_taps(firdes.band_pass(1, self.samp_rate/10, (self.beat*1000)-100, (self.beat*1000)+100, 50, firdes.WIN_HAMMING, 6.76))
self.wxgui_fftsink2_0.set_sample_rate(self.samp_rate/10)
self.analog_sig_source_x_0.set_sampling_freq(self.samp_rate)
self.analog_sig_source_x_0_0.set_sampling_freq(self.samp_rate)
def get_magnitude(self):
return self.magnitude
def set_magnitude(self, magnitude):
self.magnitude = magnitude
self._magnitude_slider.set_value(self.magnitude)
self._magnitude_text_box.set_value(self.magnitude)
self.analog_sig_source_x_0.set_amplitude(self.magnitude)
self.analog_sig_source_x_0_0.set_amplitude(self.magnitude)
def get_integ(self):
return self.integ
def set_integ(self, integ):
self.integ = integ
self._integ_slider.set_value(self.integ)
self._integ_text_box.set_value(self.integ)
self.single_pole_iir_filter_xx_0.set_taps(1.0/((self.samp_rate/10)*self.integ))
def get_beat(self):
return self.beat
def set_beat(self, beat):
self.beat = beat
self._beat_slider.set_value(self.beat)
self._beat_text_box.set_value(self.beat)
self.band_pass_filter_0.set_taps(firdes.band_pass(1, self.samp_rate/10, (self.beat*1000)-100, (self.beat*1000)+100, 50, firdes.WIN_HAMMING, 6.76))
self.analog_sig_source_x_0.set_frequency(122e3-(self.beat*1000))
if __name__ == '__main__':
parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
(options, args) = parser.parse_args()
tb = intensity_interferometer()
tb.Run(True)