QandAs » History » Version 9
Anonymous, 04/22/2017 04:04 PM
Add an answer to the "why isn't it responding?" question
1 | 1 | = Questions and Answers = |
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2 | |||
3 | == Do I need a USRP? == |
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4 | |||
5 | 4 | The USRP is not essential. You can use sample files collected by others or one of a number of alternative hardware approaches. If you already have a suitable radio receiver you can even interface to it to via your PC's soundcard. Check out the [HardwarePage hardware page] for a short write-up of approaches people are investigating. |
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6 | 1 | ||
7 | == How do I install OP25? == |
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8 | 4 | At present you can only install OP25 from source. Check the [BuildInstructionsPage build instructions] for details. |
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9 | 1 | ||
10 | 8 | == I have an error in libtool - what's going wrong? == |
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11 | I run the ./bootstrap and ./configure commands succesfuly but the make command failed with the following error: |
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12 | {{{ |
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13 | libtool:Version mismatch error. This is libtool 2.2.4, but the definition of this LT_INIT comes from an older release. You should recreate aclocal.m4 with macros from libtool 2.2.4 and run auto conf again. |
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14 | }}} |
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15 | The aclocal.m4 file is auto-generated as a result of running the 'bootstrap' script that comes with the tarball. It is safe to delete 'aclocal.m4' - bootstrap will re-create it. The usual routine is to run the following after un-tarring the tarball - |
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16 | {{{ |
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17 | 9 | ./bootstrap |
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18 | 8 | ./configure |
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19 | make |
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20 | make install |
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21 | }}} |
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22 | If you've made other changes in the middle of this process, such as installing new stuff, it might be best to always re-start at the first of these steps (bootstrap)... |
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23 | |||
24 | 5 | == The self-test doesn't work == |
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25 | |||
26 | When I try the python self-test programs I get something like this:- |
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27 | |||
28 | 6 | {{{ |
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29 | 5 | ./qa_fsk4.py |
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30 | Traceback (most recent call last): |
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31 | File "./qa_fsk4.py", line 24, in <module> |
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32 | import fsk4 |
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33 | 6 | ImportError: No module named fsk4 |
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34 | 5 | }}} |
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35 | 7 | ||
36 | 1 | This occurs because you aren't meant to run qa_fsk4.py or qa_op25.py directly. Instead you should run "make check" from the block's top-level directory. |
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37 | 9 | ||
38 | == When I run usrp_p25_rx.py the user interface is unresponsive == |
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39 | The receiver consumes a significant amount of CPU and I/O bandwidth. If you have a slow computer and are trying to receive/play a high bandwidth then there maybe little left to do anything else. Try using files with a lower sampling rate (or a higher decimation factor) to see how much bandwidth your computer can process. Also you can install the "System Monitor" applet into your task bar which gives a good visual indication of how heavily loaded your CPU is. You can use the GNURadio usrp_rx_cfile.py program to capture sample files at the command line if you really need such wideband captures on slower computers. |
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40 | 1 | ||
41 | == Why are you guys so s-l-o-w? == |
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42 | |||
43 | Well, we're a part-time hobby effort by a couple of enthusiasts. If you want to speed us up please feel free to help. |
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44 | |||
45 | == How can I help? == |
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46 | |||
47 | 8 | We're looking for help with coding, testing, providing advice, gathering sample data, writing documentation or providing hardware. Whatever you can volunteer is welcome. |