use resamplers instead LP

bmarechal
1 parent 3600e4e382
Showing 2 changed files with 295 additions and 103 deletions Side-by-side Diff
fm_radio/fm_radio.grc
fm_radio/top_block.py
@@ -82,6 +82,33 @@
     </param>
   </block>
   <block>
+    <key>variable</key>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(176, 160)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>id</key>
+      <value>decim</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>4</value>
+    </param>
+  </block>
+  <block>
     <key>variable_qtgui_range</key>
     <param>
       <key>comment</key>
@@ -89,7 +116,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>100e6</value>
+      <value>98.7e6</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -168,7 +195,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>2e6</value>
+      <value>48e3</value>
     </param>
   </block>
   <block>
@@ -195,7 +222,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(624, 448)</value>
+      <value>(608, 448)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -215,7 +242,7 @@
     </param>
     <param>
       <key>quad_rate</key>
-      <value>500e3</value>
+      <value>samp_rate*10</value>
     </param>
   </block>
   <block>
@@ -242,7 +269,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1032, 456)</value>
+      <value>(1104, 456)</value>
     </param>
     <param>
       <key>_rotation</key>
  
  
@@ -262,89 +289,14 @@
     </param>
     <param>
       <key>samp_rate</key>
-      <value>48000</value>
+      <value>int(samp_rate)</value>
     </param>
   </block>
   <block>
-    <key>low_pass_filter</key>
-    <param>
-      <key>beta</key>
-      <value>6.76</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>comment</key>
-      <value></value>
-    </param>
-    <param>
-      <key>affinity</key>
-      <value></value>
-    </param>
-    <param>
-      <key>cutoff_freq</key>
-      <value>500e3</value>
-    </param>
-    <param>
-      <key>decim</key>
-      <value>4</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>fir_filter_ccf</value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(408, 408)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>gain</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>id</key>
-      <value>low_pass_filter_0</value>
-    </param>
-    <param>
-      <key>interp</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>maxoutbuf</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>minoutbuf</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
-    </param>
-    <param>
-      <key>width</key>
-      <value>1e6</value>
-    </param>
-    <param>
-      <key>win</key>
-      <value>firdes.WIN_HAMMING</value>
-    </param>
-  </block>
-  <block>
     <key>qtgui_sink_x</key>
     <param>
       <key>bw</key>
-      <value>samp_rate</value>
+      <value>samp_rate*10*4</value>
     </param>
     <param>
       <key>alias</key>
@@ -368,7 +320,7 @@
     </param>
     <param>
       <key>_enabled</key>
-      <value>True</value>
+      <value>0</value>
     </param>
     <param>
       <key>fftsize</key>
@@ -376,7 +328,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(392, 584)</value>
+      <value>(392, 184)</value>
     </param>
     <param>
       <key>gui_hint</key>
@@ -443,7 +395,7 @@
     <key>qtgui_sink_x</key>
     <param>
       <key>bw</key>
-      <value>samp_rate/4</value>
+      <value>samp_rate/decim</value>
     </param>
     <param>
       <key>alias</key>
@@ -475,7 +427,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(632, 584)</value>
+      <value>(840, 176)</value>
     </param>
     <param>
       <key>gui_hint</key>
@@ -487,7 +439,7 @@
     </param>
     <param>
       <key>id</key>
-      <value>qtgui_sink_x_0_0</value>
+      <value>qtgui_sink_x_1</value>
     </param>
     <param>
       <key>maxoutbuf</key>
@@ -527,7 +479,7 @@
     </param>
     <param>
       <key>type</key>
-      <value>complex</value>
+      <value>float</value>
     </param>
     <param>
       <key>rate</key>
  
@@ -554,11 +506,11 @@
     </param>
     <param>
       <key>decim</key>
-      <value>500</value>
+      <value>10</value>
     </param>
     <param>
       <key>_enabled</key>
-      <value>True</value>
+      <value>1</value>
     </param>
     <param>
       <key>fbw</key>
@@ -566,7 +518,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(824, 432)</value>
+      <value>(848, 432)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -578,7 +530,7 @@
     </param>
     <param>
       <key>interp</key>
-      <value>48</value>
+      <value>1</value>
     </param>
     <param>
       <key>maxoutbuf</key>
@@ -598,6 +550,65 @@
     </param>
   </block>
   <block>
+    <key>rational_resampler_xxx</key>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>decim</key>
+      <value>4</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>fbw</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(400, 432)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>id</key>
+      <value>rational_resampler_xxx_0_0</value>
+    </param>
+    <param>
+      <key>interp</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>taps</key>
+      <value></value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>ccc</value>
+    </param>
+  </block>
+  <block>
     <key>rtlsdr_source</key>
     <param>
       <key>alias</key>
@@ -1897,7 +1908,7 @@
     </param>
     <param>
       <key>_enabled</key>
-      <value>True</value>
+      <value>1</value>
     </param>
     <param>
       <key>_coordinate</key>
@@ -1997,7 +2008,7 @@
     </param>
     <param>
       <key>sample_rate</key>
-      <value>samp_rate</value>
+      <value>samp_rate*10*4</value>
     </param>
     <param>
       <key>sync</key>
  
  
  
  
  
@@ -2006,37 +2017,37 @@
   </block>
   <connection>
     <source_block_id>analog_wfm_rcv_0</source_block_id>
-    <sink_block_id>rational_resampler_xxx_0</sink_block_id>
+    <sink_block_id>qtgui_sink_x_1</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>low_pass_filter_0</source_block_id>
-    <sink_block_id>analog_wfm_rcv_0</sink_block_id>
+    <source_block_id>analog_wfm_rcv_0</source_block_id>
+    <sink_block_id>rational_resampler_xxx_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>low_pass_filter_0</source_block_id>
-    <sink_block_id>qtgui_sink_x_0_0</sink_block_id>
+    <source_block_id>rational_resampler_xxx_0</source_block_id>
+    <sink_block_id>audio_sink_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>rational_resampler_xxx_0</source_block_id>
-    <sink_block_id>audio_sink_0</sink_block_id>
+    <source_block_id>rational_resampler_xxx_0_0</source_block_id>
+    <sink_block_id>analog_wfm_rcv_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
     <source_block_id>rtlsdr_source_0</source_block_id>
-    <sink_block_id>low_pass_filter_0</sink_block_id>
+    <sink_block_id>qtgui_sink_x_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
     <source_block_id>rtlsdr_source_0</source_block_id>
-    <sink_block_id>qtgui_sink_x_0</sink_block_id>
+    <sink_block_id>rational_resampler_xxx_0_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+##################################################
+# GNU Radio Python Flow Graph
+# Title: Top Block
+# Generated: Thu Mar 16 08:57:41 2017
+##################################################
+
+if __name__ == '__main__':
+    import ctypes
+    import sys
+    if sys.platform.startswith('linux'):
+        try:
+            x11 = ctypes.cdll.LoadLibrary('libX11.so')
+            x11.XInitThreads()
+        except:
+            print "Warning: failed to XInitThreads()"
+
+from PyQt4 import Qt
+from gnuradio import analog
+from gnuradio import audio
+from gnuradio import eng_notation
+from gnuradio import filter
+from gnuradio import gr
+from gnuradio import qtgui
+from gnuradio.eng_option import eng_option
+from gnuradio.filter import firdes
+from gnuradio.qtgui import Range, RangeWidget
+from optparse import OptionParser
+import osmosdr
+import sip
+import sys
+import time
+
+
+class top_block(gr.top_block, Qt.QWidget):
+
+    def __init__(self):
+        gr.top_block.__init__(self, "Top Block")
+        Qt.QWidget.__init__(self)
+        self.setWindowTitle("Top Block")
+        try:
+            self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
+        except:
+            pass
+        self.top_scroll_layout = Qt.QVBoxLayout()
+        self.setLayout(self.top_scroll_layout)
+        self.top_scroll = Qt.QScrollArea()
+        self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
+        self.top_scroll_layout.addWidget(self.top_scroll)
+        self.top_scroll.setWidgetResizable(True)
+        self.top_widget = Qt.QWidget()
+        self.top_scroll.setWidget(self.top_widget)
+        self.top_layout = Qt.QVBoxLayout(self.top_widget)
+        self.top_grid_layout = Qt.QGridLayout()
+        self.top_layout.addLayout(self.top_grid_layout)
+
+        self.settings = Qt.QSettings("GNU Radio", "top_block")
+        self.restoreGeometry(self.settings.value("geometry").toByteArray())
+
+        ##################################################
+        # Variables
+        ##################################################
+        self.samp_rate = samp_rate = 48e3
+        self.freq = freq = 98.7e6
+        self.decim = decim = 4
+
+        ##################################################
+        # Blocks
+        ##################################################
+        self._freq_range = Range(55e6, 200e6, 0.1e6, 98.7e6, 200)
+        self._freq_win = RangeWidget(self._freq_range, self.set_freq, "freq", "counter_slider", float)
+        self.top_grid_layout.addWidget(self._freq_win, 0,0)
+        self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + '' )
+        self.rtlsdr_source_0.set_sample_rate(samp_rate*10*4)
+        self.rtlsdr_source_0.set_center_freq(freq, 0)
+        self.rtlsdr_source_0.set_freq_corr(0, 0)
+        self.rtlsdr_source_0.set_dc_offset_mode(0, 0)
+        self.rtlsdr_source_0.set_iq_balance_mode(0, 0)
+        self.rtlsdr_source_0.set_gain_mode(False, 0)
+        self.rtlsdr_source_0.set_gain(20, 0)
+        self.rtlsdr_source_0.set_if_gain(20, 0)
+        self.rtlsdr_source_0.set_bb_gain(20, 0)
+        self.rtlsdr_source_0.set_antenna('', 0)
+        self.rtlsdr_source_0.set_bandwidth(0, 0)
+          
+        self.rational_resampler_xxx_0_0 = filter.rational_resampler_ccc(
+                interpolation=1,
+                decimation=4,
+                taps=None,
+                fractional_bw=None,
+        )
+        self.rational_resampler_xxx_0 = filter.rational_resampler_fff(
+                interpolation=1,
+                decimation=10,
+                taps=None,
+                fractional_bw=None,
+        )
+        self.qtgui_sink_x_1 = qtgui.sink_f(
+        	1024, #fftsize
+        	firdes.WIN_BLACKMAN_hARRIS, #wintype
+        	0, #fc
+        	samp_rate/decim, #bw
+        	"", #name
+        	True, #plotfreq
+        	True, #plotwaterfall
+        	True, #plottime
+        	True, #plotconst
+        )
+        self.qtgui_sink_x_1.set_update_time(1.0/10)
+        self._qtgui_sink_x_1_win = sip.wrapinstance(self.qtgui_sink_x_1.pyqwidget(), Qt.QWidget)
+        self.top_grid_layout.addWidget(self._qtgui_sink_x_1_win, 10,0)
+        
+        self.qtgui_sink_x_1.enable_rf_freq(False)
+        
+        
+          
+        self.audio_sink_0 = audio.sink(int(samp_rate), '', True)
+        self.analog_wfm_rcv_0 = analog.wfm_rcv(
+        	quad_rate=samp_rate*10,
+        	audio_decimation=1,
+        )
+
+        ##################################################
+        # Connections
+        ##################################################
+        self.connect((self.analog_wfm_rcv_0, 0), (self.qtgui_sink_x_1, 0))    
+        self.connect((self.analog_wfm_rcv_0, 0), (self.rational_resampler_xxx_0, 0))    
+        self.connect((self.rational_resampler_xxx_0, 0), (self.audio_sink_0, 0))    
+        self.connect((self.rational_resampler_xxx_0_0, 0), (self.analog_wfm_rcv_0, 0))    
+        self.connect((self.rtlsdr_source_0, 0), (self.rational_resampler_xxx_0_0, 0))    
+
+    def closeEvent(self, event):
+        self.settings = Qt.QSettings("GNU Radio", "top_block")
+        self.settings.setValue("geometry", self.saveGeometry())
+        event.accept()
+
+    def get_samp_rate(self):
+        return self.samp_rate
+
+    def set_samp_rate(self, samp_rate):
+        self.samp_rate = samp_rate
+        self.rtlsdr_source_0.set_sample_rate(self.samp_rate*10*4)
+        self.qtgui_sink_x_1.set_frequency_range(0, self.samp_rate/self.decim)
+
+    def get_freq(self):
+        return self.freq
+
+    def set_freq(self, freq):
+        self.freq = freq
+        self.rtlsdr_source_0.set_center_freq(self.freq, 0)
+
+    def get_decim(self):
+        return self.decim
+
+    def set_decim(self, decim):
+        self.decim = decim
+        self.qtgui_sink_x_1.set_frequency_range(0, self.samp_rate/self.decim)
+
+
+def main(top_block_cls=top_block, options=None):
+
+    from distutils.version import StrictVersion
+    if StrictVersion(Qt.qVersion()) >= StrictVersion("4.5.0"):
+        style = gr.prefs().get_string('qtgui', 'style', 'raster')
+        Qt.QApplication.setGraphicsSystem(style)
+    qapp = Qt.QApplication(sys.argv)
+
+    tb = top_block_cls()
+    tb.start()
+    tb.show()
+
+    def quitting():
+        tb.stop()
+        tb.wait()
+    qapp.connect(qapp, Qt.SIGNAL("aboutToQuit()"), quitting)
+    qapp.exec_()
+
+
+if __name__ == '__main__':
+    main()
...	...	@@ -82,6 +82,33 @@
82	82	</param>
83	83	</block>
84	84	<block>
	85	+ <key>variable</key>
	86	+ <param>
	87	+ <key>comment</key>
	88	+ <value></value>
	89	+ </param>
	90	+ <param>
	91	+ <key>_enabled</key>
	92	+ <value>True</value>
	93	+ </param>
	94	+ <param>
	95	+ <key>_coordinate</key>
	96	+ <value>(176, 160)</value>
	97	+ </param>
	98	+ <param>
	99	+ <key>_rotation</key>
	100	+ <value>0</value>
	101	+ </param>
	102	+ <param>
	103	+ <key>id</key>
	104	+ <value>decim</value>
	105	+ </param>
	106	+ <param>
	107	+ <key>value</key>
	108	+ <value>4</value>
	109	+ </param>
	110	+ </block>
	111	+ <block>
85	112	<key>variable_qtgui_range</key>
86	113	<param>
87	114	<key>comment</key>
...	...	@@ -89,7 +116,7 @@
89	116	</param>
90	117	<param>
91	118	<key>value</key>
92		- <value>100e6</value>
	119	+ <value>98.7e6</value>
93	120	</param>
94	121	<param>
95	122	<key>_enabled</key>
...	...	@@ -168,7 +195,7 @@
168	195	</param>
169	196	<param>
170	197	<key>value</key>
171		- <value>2e6</value>
	198	+ <value>48e3</value>
172	199	</param>
173	200	</block>
174	201	<block>
...	...	@@ -195,7 +222,7 @@
195	222	</param>
196	223	<param>
197	224	<key>_coordinate</key>
198		- <value>(624, 448)</value>
	225	+ <value>(608, 448)</value>
199	226	</param>
200	227	<param>
201	228	<key>_rotation</key>
...	...	@@ -215,7 +242,7 @@
215	242	</param>
216	243	<param>
217	244	<key>quad_rate</key>
218		- <value>500e3</value>
	245	+ <value>samp_rate*10</value>
219	246	</param>
220	247	</block>
221	248	<block>
...	...	@@ -242,7 +269,7 @@
242	269	</param>
243	270	<param>
244	271	<key>_coordinate</key>
245		- <value>(1032, 456)</value>
	272	+ <value>(1104, 456)</value>
246	273	</param>
247	274	<param>
248	275	<key>_rotation</key>
249	276
250	277
...	...	@@ -262,89 +289,14 @@
262	289	</param>
263	290	<param>
264	291	<key>samp_rate</key>
265		- <value>48000</value>
	292	+ <value>int(samp_rate)</value>
266	293	</param>
267	294	</block>
268	295	<block>
269		- <key>low_pass_filter</key>
270		- <param>
271		- <key>beta</key>
272		- <value>6.76</value>
273		- </param>
274		- <param>
275		- <key>alias</key>
276		- <value></value>
277		- </param>
278		- <param>
279		- <key>comment</key>
280		- <value></value>
281		- </param>
282		- <param>
283		- <key>affinity</key>
284		- <value></value>
285		- </param>
286		- <param>
287		- <key>cutoff_freq</key>
288		- <value>500e3</value>
289		- </param>
290		- <param>
291		- <key>decim</key>
292		- <value>4</value>
293		- </param>
294		- <param>
295		- <key>_enabled</key>
296		- <value>True</value>
297		- </param>
298		- <param>
299		- <key>type</key>
300		- <value>fir_filter_ccf</value>
301		- </param>
302		- <param>
303		- <key>_coordinate</key>
304		- <value>(408, 408)</value>
305		- </param>
306		- <param>
307		- <key>_rotation</key>
308		- <value>0</value>
309		- </param>
310		- <param>
311		- <key>gain</key>
312		- <value>1</value>
313		- </param>
314		- <param>
315		- <key>id</key>
316		- <value>low_pass_filter_0</value>
317		- </param>
318		- <param>
319		- <key>interp</key>
320		- <value>1</value>
321		- </param>
322		- <param>
323		- <key>maxoutbuf</key>
324		- <value>0</value>
325		- </param>
326		- <param>
327		- <key>minoutbuf</key>
328		- <value>0</value>
329		- </param>
330		- <param>
331		- <key>samp_rate</key>
332		- <value>samp_rate</value>
333		- </param>
334		- <param>
335		- <key>width</key>
336		- <value>1e6</value>
337		- </param>
338		- <param>
339		- <key>win</key>
340		- <value>firdes.WIN_HAMMING</value>
341		- </param>
342		- </block>
343		- <block>
344	296	<key>qtgui_sink_x</key>
345	297	<param>
346	298	<key>bw</key>
347		- <value>samp_rate</value>
	299	+ <value>samp_rate104</value>
348	300	</param>
349	301	<param>
350	302	<key>alias</key>
...	...	@@ -368,7 +320,7 @@
368	320	</param>
369	321	<param>
370	322	<key>_enabled</key>
371		- <value>True</value>
	323	+ <value>0</value>
372	324	</param>
373	325	<param>
374	326	<key>fftsize</key>
...	...	@@ -376,7 +328,7 @@
376	328	</param>
377	329	<param>
378	330	<key>_coordinate</key>
379		- <value>(392, 584)</value>
	331	+ <value>(392, 184)</value>
380	332	</param>
381	333	<param>
382	334	<key>gui_hint</key>
...	...	@@ -443,7 +395,7 @@
443	395	<key>qtgui_sink_x</key>
444	396	<param>
445	397	<key>bw</key>
446		- <value>samp_rate/4</value>
	398	+ <value>samp_rate/decim</value>
447	399	</param>
448	400	<param>
449	401	<key>alias</key>
...	...	@@ -475,7 +427,7 @@
475	427	</param>
476	428	<param>
477	429	<key>_coordinate</key>
478		- <value>(632, 584)</value>
	430	+ <value>(840, 176)</value>
479	431	</param>
480	432	<param>
481	433	<key>gui_hint</key>
...	...	@@ -487,7 +439,7 @@
487	439	</param>
488	440	<param>
489	441	<key>id</key>
490		- <value>qtgui_sink_x_0_0</value>
	442	+ <value>qtgui_sink_x_1</value>
491	443	</param>
492	444	<param>
493	445	<key>maxoutbuf</key>
...	...	@@ -527,7 +479,7 @@
527	479	</param>
528	480	<param>
529	481	<key>type</key>
530		- <value>complex</value>
	482	+ <value>float</value>
531	483	</param>
532	484	<param>
533	485	<key>rate</key>
534	486
...	...	@@ -554,11 +506,11 @@
554	506	</param>
555	507	<param>
556	508	<key>decim</key>
557		- <value>500</value>
	509	+ <value>10</value>
558	510	</param>
559	511	<param>
560	512	<key>_enabled</key>
561		- <value>True</value>
	513	+ <value>1</value>
562	514	</param>
563	515	<param>
564	516	<key>fbw</key>
...	...	@@ -566,7 +518,7 @@
566	518	</param>
567	519	<param>
568	520	<key>_coordinate</key>
569		- <value>(824, 432)</value>
	521	+ <value>(848, 432)</value>
570	522	</param>
571	523	<param>
572	524	<key>_rotation</key>
...	...	@@ -578,7 +530,7 @@
578	530	</param>
579	531	<param>
580	532	<key>interp</key>
581		- <value>48</value>
	533	+ <value>1</value>
582	534	</param>
583	535	<param>
584	536	<key>maxoutbuf</key>
...	...	@@ -598,6 +550,65 @@
598	550	</param>
599	551	</block>
600	552	<block>
	553	+ <key>rational_resampler_xxx</key>
	554	+ <param>
	555	+ <key>alias</key>
	556	+ <value></value>
	557	+ </param>
	558	+ <param>
	559	+ <key>comment</key>
	560	+ <value></value>
	561	+ </param>
	562	+ <param>
	563	+ <key>affinity</key>
	564	+ <value></value>
	565	+ </param>
	566	+ <param>
	567	+ <key>decim</key>
	568	+ <value>4</value>
	569	+ </param>
	570	+ <param>
	571	+ <key>_enabled</key>
	572	+ <value>1</value>
	573	+ </param>
	574	+ <param>
	575	+ <key>fbw</key>
	576	+ <value>0</value>
	577	+ </param>
	578	+ <param>
	579	+ <key>_coordinate</key>
	580	+ <value>(400, 432)</value>
	581	+ </param>
	582	+ <param>
	583	+ <key>_rotation</key>
	584	+ <value>0</value>
	585	+ </param>
	586	+ <param>
	587	+ <key>id</key>
	588	+ <value>rational_resampler_xxx_0_0</value>
	589	+ </param>
	590	+ <param>
	591	+ <key>interp</key>
	592	+ <value>1</value>
	593	+ </param>
	594	+ <param>
	595	+ <key>maxoutbuf</key>
	596	+ <value>0</value>
	597	+ </param>
	598	+ <param>
	599	+ <key>minoutbuf</key>
	600	+ <value>0</value>
	601	+ </param>
	602	+ <param>
	603	+ <key>taps</key>
	604	+ <value></value>
	605	+ </param>
	606	+ <param>
	607	+ <key>type</key>
	608	+ <value>ccc</value>
	609	+ </param>
	610	+ </block>
	611	+ <block>
601	612	<key>rtlsdr_source</key>
602	613	<param>
603	614	<key>alias</key>
...	...	@@ -1897,7 +1908,7 @@
1897	1908	</param>
1898	1909	<param>
1899	1910	<key>_enabled</key>
1900		- <value>True</value>
	1911	+ <value>1</value>
1901	1912	</param>
1902	1913	<param>
1903	1914	<key>_coordinate</key>
...	...	@@ -1997,7 +2008,7 @@
1997	2008	</param>
1998	2009	<param>
1999	2010	<key>sample_rate</key>
2000		- <value>samp_rate</value>
	2011	+ <value>samp_rate104</value>
2001	2012	</param>
2002	2013	<param>
2003	2014	<key>sync</key>
2004	2015
2005	2016
2006	2017
2007	2018
2008	2019
...	...	@@ -2006,37 +2017,37 @@
2006	2017	</block>
2007	2018	<connection>
2008	2019	<source_block_id>analog_wfm_rcv_0</source_block_id>
2009		- <sink_block_id>rational_resampler_xxx_0</sink_block_id>
	2020	+ <sink_block_id>qtgui_sink_x_1</sink_block_id>
2010	2021	<source_key>0</source_key>
2011	2022	<sink_key>0</sink_key>
2012	2023	</connection>
2013	2024	<connection>
2014		- <source_block_id>low_pass_filter_0</source_block_id>
2015		- <sink_block_id>analog_wfm_rcv_0</sink_block_id>
	2025	+ <source_block_id>analog_wfm_rcv_0</source_block_id>
	2026	+ <sink_block_id>rational_resampler_xxx_0</sink_block_id>
2016	2027	<source_key>0</source_key>
2017	2028	<sink_key>0</sink_key>
2018	2029	</connection>
2019	2030	<connection>
2020		- <source_block_id>low_pass_filter_0</source_block_id>
2021		- <sink_block_id>qtgui_sink_x_0_0</sink_block_id>
	2031	+ <source_block_id>rational_resampler_xxx_0</source_block_id>
	2032	+ <sink_block_id>audio_sink_0</sink_block_id>
2022	2033	<source_key>0</source_key>
2023	2034	<sink_key>0</sink_key>
2024	2035	</connection>
2025	2036	<connection>
2026		- <source_block_id>rational_resampler_xxx_0</source_block_id>
2027		- <sink_block_id>audio_sink_0</sink_block_id>
	2037	+ <source_block_id>rational_resampler_xxx_0_0</source_block_id>
	2038	+ <sink_block_id>analog_wfm_rcv_0</sink_block_id>
2028	2039	<source_key>0</source_key>
2029	2040	<sink_key>0</sink_key>
2030	2041	</connection>
2031	2042	<connection>
2032	2043	<source_block_id>rtlsdr_source_0</source_block_id>
2033		- <sink_block_id>low_pass_filter_0</sink_block_id>
	2044	+ <sink_block_id>qtgui_sink_x_0</sink_block_id>
2034	2045	<source_key>0</source_key>
2035	2046	<sink_key>0</sink_key>
2036	2047	</connection>
2037	2048	<connection>
2038	2049	<source_block_id>rtlsdr_source_0</source_block_id>
2039		- <sink_block_id>qtgui_sink_x_0</sink_block_id>
	2050	+ <sink_block_id>rational_resampler_xxx_0_0</sink_block_id>
2040	2051	<source_key>0</source_key>
2041	2052	<sink_key>0</sink_key>
2042	2053	</connection>
	1	+#!/usr/bin/env python2
	2	+# -- coding: utf-8 --
	3	+##################################################
	4	+# GNU Radio Python Flow Graph
	5	+# Title: Top Block
	6	+# Generated: Thu Mar 16 08:57:41 2017
	7	+##################################################
	8	+
	9	+if __name__ == '__main__':
	10	+ import ctypes
	11	+ import sys
	12	+ if sys.platform.startswith('linux'):
	13	+ try:
	14	+ x11 = ctypes.cdll.LoadLibrary('libX11.so')
	15	+ x11.XInitThreads()
	16	+ except:
	17	+ print "Warning: failed to XInitThreads()"
	18	+
	19	+from PyQt4 import Qt
	20	+from gnuradio import analog
	21	+from gnuradio import audio
	22	+from gnuradio import eng_notation
	23	+from gnuradio import filter
	24	+from gnuradio import gr
	25	+from gnuradio import qtgui
	26	+from gnuradio.eng_option import eng_option
	27	+from gnuradio.filter import firdes
	28	+from gnuradio.qtgui import Range, RangeWidget
	29	+from optparse import OptionParser
	30	+import osmosdr
	31	+import sip
	32	+import sys
	33	+import time
	34	+
	35	+
	36	+class top_block(gr.top_block, Qt.QWidget):
	37	+
	38	+ def __init__(self):
	39	+ gr.top_block.__init__(self, "Top Block")
	40	+ Qt.QWidget.__init__(self)
	41	+ self.setWindowTitle("Top Block")
	42	+ try:
	43	+ self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
	44	+ except:
	45	+ pass
	46	+ self.top_scroll_layout = Qt.QVBoxLayout()
	47	+ self.setLayout(self.top_scroll_layout)
	48	+ self.top_scroll = Qt.QScrollArea()
	49	+ self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
	50	+ self.top_scroll_layout.addWidget(self.top_scroll)
	51	+ self.top_scroll.setWidgetResizable(True)
	52	+ self.top_widget = Qt.QWidget()
	53	+ self.top_scroll.setWidget(self.top_widget)
	54	+ self.top_layout = Qt.QVBoxLayout(self.top_widget)
	55	+ self.top_grid_layout = Qt.QGridLayout()
	56	+ self.top_layout.addLayout(self.top_grid_layout)
	57	+
	58	+ self.settings = Qt.QSettings("GNU Radio", "top_block")
	59	+ self.restoreGeometry(self.settings.value("geometry").toByteArray())
	60	+
	61	+ ##################################################
	62	+ # Variables
	63	+ ##################################################
	64	+ self.samp_rate = samp_rate = 48e3
	65	+ self.freq = freq = 98.7e6
	66	+ self.decim = decim = 4
	67	+
	68	+ ##################################################
	69	+ # Blocks
	70	+ ##################################################
	71	+ self._freq_range = Range(55e6, 200e6, 0.1e6, 98.7e6, 200)
	72	+ self._freq_win = RangeWidget(self._freq_range, self.set_freq, "freq", "counter_slider", float)
	73	+ self.top_grid_layout.addWidget(self._freq_win, 0,0)
	74	+ self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + '' )
	75	+ self.rtlsdr_source_0.set_sample_rate(samp_rate104)
	76	+ self.rtlsdr_source_0.set_center_freq(freq, 0)
	77	+ self.rtlsdr_source_0.set_freq_corr(0, 0)
	78	+ self.rtlsdr_source_0.set_dc_offset_mode(0, 0)
	79	+ self.rtlsdr_source_0.set_iq_balance_mode(0, 0)
	80	+ self.rtlsdr_source_0.set_gain_mode(False, 0)
	81	+ self.rtlsdr_source_0.set_gain(20, 0)
	82	+ self.rtlsdr_source_0.set_if_gain(20, 0)
	83	+ self.rtlsdr_source_0.set_bb_gain(20, 0)
	84	+ self.rtlsdr_source_0.set_antenna('', 0)
	85	+ self.rtlsdr_source_0.set_bandwidth(0, 0)
	86	+
	87	+ self.rational_resampler_xxx_0_0 = filter.rational_resampler_ccc(
	88	+ interpolation=1,
	89	+ decimation=4,
	90	+ taps=None,
	91	+ fractional_bw=None,
	92	+ )
	93	+ self.rational_resampler_xxx_0 = filter.rational_resampler_fff(
	94	+ interpolation=1,
	95	+ decimation=10,
	96	+ taps=None,
	97	+ fractional_bw=None,
	98	+ )
	99	+ self.qtgui_sink_x_1 = qtgui.sink_f(
	100	+ 1024, #fftsize
	101	+ firdes.WIN_BLACKMAN_hARRIS, #wintype
	102	+ 0, #fc
	103	+ samp_rate/decim, #bw
	104	+ "", #name
	105	+ True, #plotfreq
	106	+ True, #plotwaterfall
	107	+ True, #plottime
	108	+ True, #plotconst
	109	+ )
	110	+ self.qtgui_sink_x_1.set_update_time(1.0/10)
	111	+ self._qtgui_sink_x_1_win = sip.wrapinstance(self.qtgui_sink_x_1.pyqwidget(), Qt.QWidget)
	112	+ self.top_grid_layout.addWidget(self._qtgui_sink_x_1_win, 10,0)
	113	+
	114	+ self.qtgui_sink_x_1.enable_rf_freq(False)
	115	+
	116	+
	117	+
	118	+ self.audio_sink_0 = audio.sink(int(samp_rate), '', True)
	119	+ self.analog_wfm_rcv_0 = analog.wfm_rcv(
	120	+ quad_rate=samp_rate*10,
	121	+ audio_decimation=1,
	122	+ )
	123	+
	124	+ ##################################################
	125	+ # Connections
	126	+ ##################################################
	127	+ self.connect((self.analog_wfm_rcv_0, 0), (self.qtgui_sink_x_1, 0))
	128	+ self.connect((self.analog_wfm_rcv_0, 0), (self.rational_resampler_xxx_0, 0))
	129	+ self.connect((self.rational_resampler_xxx_0, 0), (self.audio_sink_0, 0))
	130	+ self.connect((self.rational_resampler_xxx_0_0, 0), (self.analog_wfm_rcv_0, 0))
	131	+ self.connect((self.rtlsdr_source_0, 0), (self.rational_resampler_xxx_0_0, 0))
	132	+
	133	+ def closeEvent(self, event):
	134	+ self.settings = Qt.QSettings("GNU Radio", "top_block")
	135	+ self.settings.setValue("geometry", self.saveGeometry())
	136	+ event.accept()
	137	+
	138	+ def get_samp_rate(self):
	139	+ return self.samp_rate
	140	+
	141	+ def set_samp_rate(self, samp_rate):
	142	+ self.samp_rate = samp_rate
	143	+ self.rtlsdr_source_0.set_sample_rate(self.samp_rate104)
	144	+ self.qtgui_sink_x_1.set_frequency_range(0, self.samp_rate/self.decim)
	145	+
	146	+ def get_freq(self):
	147	+ return self.freq
	148	+
	149	+ def set_freq(self, freq):
	150	+ self.freq = freq
	151	+ self.rtlsdr_source_0.set_center_freq(self.freq, 0)
	152	+
	153	+ def get_decim(self):
	154	+ return self.decim
	155	+
	156	+ def set_decim(self, decim):
	157	+ self.decim = decim
	158	+ self.qtgui_sink_x_1.set_frequency_range(0, self.samp_rate/self.decim)
	159	+
	160	+
	161	+def main(top_block_cls=top_block, options=None):
	162	+
	163	+ from distutils.version import StrictVersion
	164	+ if StrictVersion(Qt.qVersion()) >= StrictVersion("4.5.0"):
	165	+ style = gr.prefs().get_string('qtgui', 'style', 'raster')
	166	+ Qt.QApplication.setGraphicsSystem(style)
	167	+ qapp = Qt.QApplication(sys.argv)
	168	+
	169	+ tb = top_block_cls()
	170	+ tb.start()
	171	+ tb.show()
	172	+
	173	+ def quitting():
	174	+ tb.stop()
	175	+ tb.wait()
	176	+ qapp.connect(qapp, Qt.SIGNAL("aboutToQuit()"), quitting)
	177	+ qapp.exec_()
	178	+
	179	+
	180	+if __name__ == '__main__':
	181	+ main()