So the spectrum looks correct. To get the x-axis to display a center frequency of 22050, you need to check the box "display RF frequencies".
I think that "display RF frequencies" should be the default behavior, but I will leave that decision to Tom. -Josh On 04/30/2011 07:47 AM, Stefan Gofferje wrote: > On 04/30/2011 05:38 PM, Marcus D. Leech wrote: >> The bandwidth is used to determine both the axis labels, and the correct >> decimation parameters >> to use to produce the desired display rate. The center frequency is >> purely used set axis labels. > >> I'd still recommend posting your .GRC file here. > > <?xml version='1.0' encoding='ASCII'?> > <flow_graph> > <timestamp>Sat Apr 30 17:25:44 2011</timestamp> > <block> > <key>options</key> > <param> > <key>id</key> > <value>top_block</value> > </param> > <param> > <key>_enabled</key> > <value>True</value> > </param> > <param> > <key>title</key> > <value></value> > </param> > <param> > <key>author</key> > <value></value> > </param> > <param> > <key>description</key> > <value></value> > </param> > <param> > <key>window_size</key> > <value>1200,600</value> > </param> > <param> > <key>generate_options</key> > <value>qt_gui</value> > </param> > <param> > <key>category</key> > <value>Custom</value> > </param> > <param> > <key>run_options</key> > <value>prompt</value> > </param> > <param> > <key>run</key> > <value>True</value> > </param> > <param> > <key>realtime_scheduling</key> > <value></value> > </param> > <param> > <key>_coordinate</key> > <value>(10, 10)</value> > </param> > <param> > <key>_rotation</key> > <value>0</value> > </param> > </block> > <block> > <key>variable</key> > <param> > <key>id</key> > <value>samp_rate</value> > </param> > <param> > <key>_enabled</key> > <value>True</value> > </param> > <param> > <key>value</key> > <value>44100</value> > </param> > <param> > <key>_coordinate</key> > <value>(10, 170)</value> > </param> > <param> > <key>_rotation</key> > <value>0</value> > </param> > </block> > <block> > <key>gr_add_xx</key> > <param> > <key>id</key> > <value>gr_add_xx_0</value> > </param> > <param> > <key>_enabled</key> > <value>True</value> > </param> > <param> > <key>type</key> > <value>float</value> > </param> > <param> > <key>num_inputs</key> > <value>2</value> > </param> > <param> > <key>vlen</key> > <value>1</value> > </param> > <param> > <key>_coordinate</key> > <value>(579, 223)</value> > </param> > <param> > <key>_rotation</key> > <value>0</value> > </param> > </block> > <block> > <key>gr_throttle</key> > <param> > <key>id</key> > <value>gr_throttle_0</value> > </param> > <param> > <key>_enabled</key> > <value>True</value> > </param> > <param> > <key>type</key> > <value>float</value> > </param> > <param> > <key>samples_per_second</key> > <value>samp_rate</value> > </param> > <param> > <key>vlen</key> > <value>1</value> > </param> > <param> > <key>_coordinate</key> > <value>(716, 235)</value> > </param> > <param> > <key>_rotation</key> > <value>0</value> > </param> > </block> > <block> > <key>qtgui_sink_x</key> > <param> > <key>id</key> > <value>qtgui_sink_x_0</value> > </param> > <param> > <key>_enabled</key> > <value>True</value> > </param> > <param> > <key>type</key> > <value>float</value> > </param> > <param> > <key>name</key> > <value>QT GUI Plot</value> > </param> > <param> > <key>fftsize</key> > <value>1024</value> > </param> > <param> > <key>wintype</key> > <value>firdes.WIN_BLACKMAN_hARRIS</value> > </param> > <param> > <key>fc</key> > <value>22050</value> > </param> > <param> > <key>bw</key> > <value>44100</value> > </param> > <param> > <key>plotfreq</key> > <value>True</value> > </param> > <param> > <key>plotwaterfall</key> > <value>True</value> > </param> > <param> > <key>plottime</key> > <value>True</value> > </param> > <param> > <key>plotconst</key> > <value>False</value> > </param> > <param> > <key>gui_hint</key> > <value>:0,0,1,1</value> > </param> > <param> > <key>_coordinate</key> > <value>(913, 212)</value> > </param> > <param> > <key>_rotation</key> > <value>0</value> > </param> > </block> > <block> > <key>gr_sig_source_x</key> > <param> > <key>id</key> > <value>gr_sig_source_x_0</value> > </param> > <param> > <key>_enabled</key> > <value>True</value> > </param> > <param> > <key>type</key> > <value>float</value> > </param> > <param> > <key>samp_rate</key> > <value>samp_rate</value> > </param> > <param> > <key>waveform</key> > <value>gr.GR_SIN_WAVE</value> > </param> > <param> > <key>freq</key> > <value>1000</value> > </param> > <param> > <key>amp</key> > <value>1</value> > </param> > <param> > <key>offset</key> > <value>0</value> > </param> > <param> > <key>_coordinate</key> > <value>(364, 137)</value> > </param> > <param> > <key>_rotation</key> > <value>0</value> > </param> > </block> > <block> > <key>gr_sig_source_x</key> > <param> > <key>id</key> > <value>gr_sig_source_x_1</value> > </param> > <param> > <key>_enabled</key> > <value>True</value> > </param> > <param> > <key>type</key> > <value>float</value> > </param> > <param> > <key>samp_rate</key> > <value>samp_rate</value> > </param> > <param> > <key>waveform</key> > <value>gr.GR_SIN_WAVE</value> > </param> > <param> > <key>freq</key> > <value>5000</value> > </param> > <param> > <key>amp</key> > <value>1</value> > </param> > <param> > <key>offset</key> > <value>0</value> > </param> > <param> > <key>_coordinate</key> > <value>(361, 282)</value> > </param> > <param> > <key>_rotation</key> > <value>0</value> > </param> > </block> > <connection> > <source_block_id>gr_sig_source_x_0</source_block_id> > <sink_block_id>gr_add_xx_0</sink_block_id> > <source_key>0</source_key> > <sink_key>0</sink_key> > </connection> > <connection> > <source_block_id>gr_sig_source_x_1</source_block_id> > <sink_block_id>gr_add_xx_0</sink_block_id> > <source_key>0</source_key> > <sink_key>1</sink_key> > </connection> > <connection> > <source_block_id>gr_add_xx_0</source_block_id> > <sink_block_id>gr_throttle_0</sink_block_id> > <source_key>0</source_key> > <sink_key>0</sink_key> > </connection> > <connection> > <source_block_id>gr_throttle_0</source_block_id> > <sink_block_id>qtgui_sink_x_0</sink_block_id> > <source_key>0</source_key> > <sink_key>0</sink_key> > </connection> > </flow_graph> _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list 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