Note, be careful of the rf_gain settings.
And you need give the absolute path the file in the File block.
I have a tuned antenna and good cabling.
If there's an imbalance at the antenna for whatever reason, current will
flow down the outside the coaxial sheath.
I place a current choke on the coaxial cable at the antenna end.
The choke won't impact the currents flowing inside the coaxial cable.
The carrier frequency of 172.025 MHz is the same frequency which my
BeagleBone Black transmits when it's powered up.
I'm mot sure if it's a filter resonating or a bug.
I believe the 170 MHz band is reserved for government and wireless
microphones.
On 02/09/2016 07:29 PM, McDonald, J Douglas wrote:
> I managed to transmit FM radio, finally.
>
> Here's whta I really need:
>
> I have a file, arbitrary length, of 16 bit signed integers . This is assumed
> sampled at
> 20MHz, that is, bandwidth 0 to 10MHz. I could make it a mono wave file, but
> no header is easier.
>
> I want to read it into grc and change it (presumably by multiplying by a
> complex sine wave) to a stream of complex numbers sampled at 10 MHz,
> presumably from -5 to 5 MHz. This then gets fed to an Osmocom sink to
> HArckRF which transmits it centered on some high frequency.
>
> The only thing I don't know how to do is read in a plain (non-wav) file at 10
> MHZ and
> get it to a complex stream at half the sample rate centered at zero.
>
> How do I do these two things?
> _______________________________________________
> HackRF-dev mailing list
> [email protected]
> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
>
<?xml version='1.0' encoding='ASCII'?>
<?grc format='1' created='3.7.5'?>
<flow_graph>
<timestamp>Wed Feb 10 00:36:30 2016</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>NBFM TX</value>
</param>
<param>
<key>author</key>
<value></value>
</param>
<param>
<key>description</key>
<value></value>
</param>
<param>
<key>window_size</key>
<value>1280, 1024</value>
</param>
<param>
<key>generate_options</key>
<value>no_gui</value>
</param>
<param>
<key>category</key>
<value>Custom</value>
</param>
<param>
<key>run_options</key>
<value>run</value>
</param>
<param>
<key>run</key>
<value>True</value>
</param>
<param>
<key>max_nouts</key>
<value>0</value>
</param>
<param>
<key>realtime_scheduling</key>
<value></value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(8, 6)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable</key>
<param>
<key>id</key>
<value>carrier_frequency</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>value</key>
<value>172.025e6</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(200, 13)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable</key>
<param>
<key>id</key>
<value>if_gain</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>value</key>
<value>15</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(496, 13)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable</key>
<param>
<key>id</key>
<value>audio_rate</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>value</key>
<value>48000</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(568, 13)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable</key>
<param>
<key>id</key>
<value>rf_gain</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>value</key>
<value>15</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(424, 13)</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>1.75e6</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(328, 13)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>osmosdr_sink</key>
<param>
<key>id</key>
<value>osmosdr_sink_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>fc32</value>
</param>
<param>
<key>args</key>
<value>hackrf=2379538f</value>
</param>
<param>
<key>sync</key>
<value></value>
</param>
<param>
<key>num_mboards</key>
<value>1</value>
</param>
<param>
<key>clock_source0</key>
<value></value>
</param>
<param>
<key>time_source0</key>
<value></value>
</param>
<param>
<key>clock_source1</key>
<value></value>
</param>
<param>
<key>time_source1</key>
<value></value>
</param>
<param>
<key>clock_source2</key>
<value></value>
</param>
<param>
<key>time_source2</key>
<value></value>
</param>
<param>
<key>clock_source3</key>
<value></value>
</param>
<param>
<key>time_source3</key>
<value></value>
</param>
<param>
<key>clock_source4</key>
<value></value>
</param>
<param>
<key>time_source4</key>
<value></value>
</param>
<param>
<key>clock_source5</key>
<value></value>
</param>
<param>
<key>time_source5</key>
<value></value>
</param>
<param>
<key>clock_source6</key>
<value></value>
</param>
<param>
<key>time_source6</key>
<value></value>
</param>
<param>
<key>clock_source7</key>
<value></value>
</param>
<param>
<key>time_source7</key>
<value></value>
</param>
<param>
<key>nchan</key>
<value>1</value>
</param>
<param>
<key>sample_rate</key>
<value>samp_rate</value>
</param>
<param>
<key>freq0</key>
<value>carrier_frequency</value>
</param>
<param>
<key>corr0</key>
<value>0</value>
</param>
<param>
<key>gain0</key>
<value>rf_gain</value>
</param>
<param>
<key>if_gain0</key>
<value>if_gain</value>
</param>
<param>
<key>bb_gain0</key>
<value>0</value>
</param>
<param>
<key>ant0</key>
<value></value>
</param>
<param>
<key>bw0</key>
<value>0</value>
</param>
<param>
<key>freq1</key>
<value>100e6</value>
</param>
<param>
<key>corr1</key>
<value>0</value>
</param>
<param>
<key>gain1</key>
<value>10</value>
</param>
<param>
<key>if_gain1</key>
<value>20</value>
</param>
<param>
<key>bb_gain1</key>
<value>20</value>
</param>
<param>
<key>ant1</key>
<value></value>
</param>
<param>
<key>bw1</key>
<value>0</value>
</param>
<param>
<key>freq2</key>
<value>100e6</value>
</param>
<param>
<key>corr2</key>
<value>0</value>
</param>
<param>
<key>gain2</key>
<value>10</value>
</param>
<param>
<key>if_gain2</key>
<value>20</value>
</param>
<param>
<key>bb_gain2</key>
<value>20</value>
</param>
<param>
<key>ant2</key>
<value></value>
</param>
<param>
<key>bw2</key>
<value>0</value>
</param>
<param>
<key>freq3</key>
<value>100e6</value>
</param>
<param>
<key>corr3</key>
<value>0</value>
</param>
<param>
<key>gain3</key>
<value>10</value>
</param>
<param>
<key>if_gain3</key>
<value>20</value>
</param>
<param>
<key>bb_gain3</key>
<value>20</value>
</param>
<param>
<key>ant3</key>
<value></value>
</param>
<param>
<key>bw3</key>
<value>0</value>
</param>
<param>
<key>freq4</key>
<value>100e6</value>
</param>
<param>
<key>corr4</key>
<value>0</value>
</param>
<param>
<key>gain4</key>
<value>10</value>
</param>
<param>
<key>if_gain4</key>
<value>20</value>
</param>
<param>
<key>bb_gain4</key>
<value>20</value>
</param>
<param>
<key>ant4</key>
<value></value>
</param>
<param>
<key>bw4</key>
<value>0</value>
</param>
<param>
<key>freq5</key>
<value>100e6</value>
</param>
<param>
<key>corr5</key>
<value>0</value>
</param>
<param>
<key>gain5</key>
<value>10</value>
</param>
<param>
<key>if_gain5</key>
<value>20</value>
</param>
<param>
<key>bb_gain5</key>
<value>20</value>
</param>
<param>
<key>ant5</key>
<value></value>
</param>
<param>
<key>bw5</key>
<value>0</value>
</param>
<param>
<key>freq6</key>
<value>100e6</value>
</param>
<param>
<key>corr6</key>
<value>0</value>
</param>
<param>
<key>gain6</key>
<value>10</value>
</param>
<param>
<key>if_gain6</key>
<value>20</value>
</param>
<param>
<key>bb_gain6</key>
<value>20</value>
</param>
<param>
<key>ant6</key>
<value></value>
</param>
<param>
<key>bw6</key>
<value>0</value>
</param>
<param>
<key>freq7</key>
<value>100e6</value>
</param>
<param>
<key>corr7</key>
<value>0</value>
</param>
<param>
<key>gain7</key>
<value>10</value>
</param>
<param>
<key>if_gain7</key>
<value>20</value>
</param>
<param>
<key>bb_gain7</key>
<value>20</value>
</param>
<param>
<key>ant7</key>
<value></value>
</param>
<param>
<key>bw7</key>
<value>0</value>
</param>
<param>
<key>freq8</key>
<value>100e6</value>
</param>
<param>
<key>corr8</key>
<value>0</value>
</param>
<param>
<key>gain8</key>
<value>10</value>
</param>
<param>
<key>if_gain8</key>
<value>20</value>
</param>
<param>
<key>bb_gain8</key>
<value>20</value>
</param>
<param>
<key>ant8</key>
<value></value>
</param>
<param>
<key>bw8</key>
<value>0</value>
</param>
<param>
<key>freq9</key>
<value>100e6</value>
</param>
<param>
<key>corr9</key>
<value>0</value>
</param>
<param>
<key>gain9</key>
<value>10</value>
</param>
<param>
<key>if_gain9</key>
<value>20</value>
</param>
<param>
<key>bb_gain9</key>
<value>20</value>
</param>
<param>
<key>ant9</key>
<value></value>
</param>
<param>
<key>bw9</key>
<value>0</value>
</param>
<param>
<key>freq10</key>
<value>100e6</value>
</param>
<param>
<key>corr10</key>
<value>0</value>
</param>
<param>
<key>gain10</key>
<value>10</value>
</param>
<param>
<key>if_gain10</key>
<value>20</value>
</param>
<param>
<key>bb_gain10</key>
<value>20</value>
</param>
<param>
<key>ant10</key>
<value></value>
</param>
<param>
<key>bw10</key>
<value>0</value>
</param>
<param>
<key>freq11</key>
<value>100e6</value>
</param>
<param>
<key>corr11</key>
<value>0</value>
</param>
<param>
<key>gain11</key>
<value>10</value>
</param>
<param>
<key>if_gain11</key>
<value>20</value>
</param>
<param>
<key>bb_gain11</key>
<value>20</value>
</param>
<param>
<key>ant11</key>
<value></value>
</param>
<param>
<key>bw11</key>
<value>0</value>
</param>
<param>
<key>freq12</key>
<value>100e6</value>
</param>
<param>
<key>corr12</key>
<value>0</value>
</param>
<param>
<key>gain12</key>
<value>10</value>
</param>
<param>
<key>if_gain12</key>
<value>20</value>
</param>
<param>
<key>bb_gain12</key>
<value>20</value>
</param>
<param>
<key>ant12</key>
<value></value>
</param>
<param>
<key>bw12</key>
<value>0</value>
</param>
<param>
<key>freq13</key>
<value>100e6</value>
</param>
<param>
<key>corr13</key>
<value>0</value>
</param>
<param>
<key>gain13</key>
<value>10</value>
</param>
<param>
<key>if_gain13</key>
<value>20</value>
</param>
<param>
<key>bb_gain13</key>
<value>20</value>
</param>
<param>
<key>ant13</key>
<value></value>
</param>
<param>
<key>bw13</key>
<value>0</value>
</param>
<param>
<key>freq14</key>
<value>100e6</value>
</param>
<param>
<key>corr14</key>
<value>0</value>
</param>
<param>
<key>gain14</key>
<value>10</value>
</param>
<param>
<key>if_gain14</key>
<value>20</value>
</param>
<param>
<key>bb_gain14</key>
<value>20</value>
</param>
<param>
<key>ant14</key>
<value></value>
</param>
<param>
<key>bw14</key>
<value>0</value>
</param>
<param>
<key>freq15</key>
<value>100e6</value>
</param>
<param>
<key>corr15</key>
<value>0</value>
</param>
<param>
<key>gain15</key>
<value>10</value>
</param>
<param>
<key>if_gain15</key>
<value>20</value>
</param>
<param>
<key>bb_gain15</key>
<value>20</value>
</param>
<param>
<key>ant15</key>
<value></value>
</param>
<param>
<key>bw15</key>
<value>0</value>
</param>
<param>
<key>freq16</key>
<value>100e6</value>
</param>
<param>
<key>corr16</key>
<value>0</value>
</param>
<param>
<key>gain16</key>
<value>10</value>
</param>
<param>
<key>if_gain16</key>
<value>20</value>
</param>
<param>
<key>bb_gain16</key>
<value>20</value>
</param>
<param>
<key>ant16</key>
<value></value>
</param>
<param>
<key>bw16</key>
<value>0</value>
</param>
<param>
<key>freq17</key>
<value>100e6</value>
</param>
<param>
<key>corr17</key>
<value>0</value>
</param>
<param>
<key>gain17</key>
<value>10</value>
</param>
<param>
<key>if_gain17</key>
<value>20</value>
</param>
<param>
<key>bb_gain17</key>
<value>20</value>
</param>
<param>
<key>ant17</key>
<value></value>
</param>
<param>
<key>bw17</key>
<value>0</value>
</param>
<param>
<key>freq18</key>
<value>100e6</value>
</param>
<param>
<key>corr18</key>
<value>0</value>
</param>
<param>
<key>gain18</key>
<value>10</value>
</param>
<param>
<key>if_gain18</key>
<value>20</value>
</param>
<param>
<key>bb_gain18</key>
<value>20</value>
</param>
<param>
<key>ant18</key>
<value></value>
</param>
<param>
<key>bw18</key>
<value>0</value>
</param>
<param>
<key>freq19</key>
<value>100e6</value>
</param>
<param>
<key>corr19</key>
<value>0</value>
</param>
<param>
<key>gain19</key>
<value>10</value>
</param>
<param>
<key>if_gain19</key>
<value>20</value>
</param>
<param>
<key>bb_gain19</key>
<value>20</value>
</param>
<param>
<key>ant19</key>
<value></value>
</param>
<param>
<key>bw19</key>
<value>0</value>
</param>
<param>
<key>freq20</key>
<value>100e6</value>
</param>
<param>
<key>corr20</key>
<value>0</value>
</param>
<param>
<key>gain20</key>
<value>10</value>
</param>
<param>
<key>if_gain20</key>
<value>20</value>
</param>
<param>
<key>bb_gain20</key>
<value>20</value>
</param>
<param>
<key>ant20</key>
<value></value>
</param>
<param>
<key>bw20</key>
<value>0</value>
</param>
<param>
<key>freq21</key>
<value>100e6</value>
</param>
<param>
<key>corr21</key>
<value>0</value>
</param>
<param>
<key>gain21</key>
<value>10</value>
</param>
<param>
<key>if_gain21</key>
<value>20</value>
</param>
<param>
<key>bb_gain21</key>
<value>20</value>
</param>
<param>
<key>ant21</key>
<value></value>
</param>
<param>
<key>bw21</key>
<value>0</value>
</param>
<param>
<key>freq22</key>
<value>100e6</value>
</param>
<param>
<key>corr22</key>
<value>0</value>
</param>
<param>
<key>gain22</key>
<value>10</value>
</param>
<param>
<key>if_gain22</key>
<value>20</value>
</param>
<param>
<key>bb_gain22</key>
<value>20</value>
</param>
<param>
<key>ant22</key>
<value></value>
</param>
<param>
<key>bw22</key>
<value>0</value>
</param>
<param>
<key>freq23</key>
<value>100e6</value>
</param>
<param>
<key>corr23</key>
<value>0</value>
</param>
<param>
<key>gain23</key>
<value>10</value>
</param>
<param>
<key>if_gain23</key>
<value>20</value>
</param>
<param>
<key>bb_gain23</key>
<value>20</value>
</param>
<param>
<key>ant23</key>
<value></value>
</param>
<param>
<key>bw23</key>
<value>0</value>
</param>
<param>
<key>freq24</key>
<value>100e6</value>
</param>
<param>
<key>corr24</key>
<value>0</value>
</param>
<param>
<key>gain24</key>
<value>10</value>
</param>
<param>
<key>if_gain24</key>
<value>20</value>
</param>
<param>
<key>bb_gain24</key>
<value>20</value>
</param>
<param>
<key>ant24</key>
<value></value>
</param>
<param>
<key>bw24</key>
<value>0</value>
</param>
<param>
<key>freq25</key>
<value>100e6</value>
</param>
<param>
<key>corr25</key>
<value>0</value>
</param>
<param>
<key>gain25</key>
<value>10</value>
</param>
<param>
<key>if_gain25</key>
<value>20</value>
</param>
<param>
<key>bb_gain25</key>
<value>20</value>
</param>
<param>
<key>ant25</key>
<value></value>
</param>
<param>
<key>bw25</key>
<value>0</value>
</param>
<param>
<key>freq26</key>
<value>100e6</value>
</param>
<param>
<key>corr26</key>
<value>0</value>
</param>
<param>
<key>gain26</key>
<value>10</value>
</param>
<param>
<key>if_gain26</key>
<value>20</value>
</param>
<param>
<key>bb_gain26</key>
<value>20</value>
</param>
<param>
<key>ant26</key>
<value></value>
</param>
<param>
<key>bw26</key>
<value>0</value>
</param>
<param>
<key>freq27</key>
<value>100e6</value>
</param>
<param>
<key>corr27</key>
<value>0</value>
</param>
<param>
<key>gain27</key>
<value>10</value>
</param>
<param>
<key>if_gain27</key>
<value>20</value>
</param>
<param>
<key>bb_gain27</key>
<value>20</value>
</param>
<param>
<key>ant27</key>
<value></value>
</param>
<param>
<key>bw27</key>
<value>0</value>
</param>
<param>
<key>freq28</key>
<value>100e6</value>
</param>
<param>
<key>corr28</key>
<value>0</value>
</param>
<param>
<key>gain28</key>
<value>10</value>
</param>
<param>
<key>if_gain28</key>
<value>20</value>
</param>
<param>
<key>bb_gain28</key>
<value>20</value>
</param>
<param>
<key>ant28</key>
<value></value>
</param>
<param>
<key>bw28</key>
<value>0</value>
</param>
<param>
<key>freq29</key>
<value>100e6</value>
</param>
<param>
<key>corr29</key>
<value>0</value>
</param>
<param>
<key>gain29</key>
<value>10</value>
</param>
<param>
<key>if_gain29</key>
<value>20</value>
</param>
<param>
<key>bb_gain29</key>
<value>20</value>
</param>
<param>
<key>ant29</key>
<value></value>
</param>
<param>
<key>bw29</key>
<value>0</value>
</param>
<param>
<key>freq30</key>
<value>100e6</value>
</param>
<param>
<key>corr30</key>
<value>0</value>
</param>
<param>
<key>gain30</key>
<value>10</value>
</param>
<param>
<key>if_gain30</key>
<value>20</value>
</param>
<param>
<key>bb_gain30</key>
<value>20</value>
</param>
<param>
<key>ant30</key>
<value></value>
</param>
<param>
<key>bw30</key>
<value>0</value>
</param>
<param>
<key>freq31</key>
<value>100e6</value>
</param>
<param>
<key>corr31</key>
<value>0</value>
</param>
<param>
<key>gain31</key>
<value>10</value>
</param>
<param>
<key>if_gain31</key>
<value>20</value>
</param>
<param>
<key>bb_gain31</key>
<value>20</value>
</param>
<param>
<key>ant31</key>
<value></value>
</param>
<param>
<key>bw31</key>
<value>0</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(504, 266)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>blocks_file_source</key>
<param>
<key>id</key>
<value>blocks_file_source_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>file</key>
<value></value>
</param>
<param>
<key>type</key>
<value>int</value>
</param>
<param>
<key>repeat</key>
<value>True</value>
</param>
<param>
<key>vlen</key>
<value>1</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(32, 149)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>blocks_throttle</key>
<param>
<key>id</key>
<value>blocks_throttle_0_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>ignoretag</key>
<value>True</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(168, 156)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>analog_nbfm_tx</key>
<param>
<key>id</key>
<value>analog_nbfm_tx_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>audio_rate</key>
<value>audio_rate</value>
</param>
<param>
<key>quad_rate</key>
<value>audio_rate * 4</value>
</param>
<param>
<key>tau</key>
<value>50e-6</value>
</param>
<param>
<key>max_dev</key>
<value>4e3</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(344, 135)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>rational_resampler_xxx</key>
<param>
<key>id</key>
<value>rational_resampler_xxx_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>ccc</value>
</param>
<param>
<key>interp</key>
<value>4</value>
</param>
<param>
<key>decim</key>
<value>1</value>
</param>
<param>
<key>taps</key>
<value></value>
</param>
<param>
<key>fbw</key>
<value>0</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(552, 135)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<connection>
<source_block_id>rational_resampler_xxx_0</source_block_id>
<sink_block_id>osmosdr_sink_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>analog_nbfm_tx_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>blocks_file_source_0</source_block_id>
<sink_block_id>blocks_throttle_0_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>blocks_throttle_0_0</source_block_id>
<sink_block_id>analog_nbfm_tx_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
</flow_graph>
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