op25-dev

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309 discussions

GRC error
by hotfire00 09 Apr '12

09 Apr '12

Hi everyone, New to GNUradio and OP25. I have the OP25 block installed in GNU Radio Companion and can build a flow graph with no problem. When I try to execute the flow graph I get this error: Traceback (most recent call last): File "/home/aaknitt/Documents/top_block.py", line 53, in <module> tb = top_block() File "/home/aaknitt/Documents/top_block.py", line 34, in __init__ self.op25_decoder_0.create() File "/usr/local/lib/python2.7/dist-packages/baz/op25.py", line 65, in create self.p25_decoder = op25.decoder_ff(self.op25_msgq) AttributeError: 'module' object has no attribute 'decoder_ff' I'm guessing this is because I don't have something installed properly, but I can't put my finger on how to remedy the problem. Any advice or suggestions would be appreciated. Regards, Andy

4 4

GRC Flowcharts
by allanjs1986 08 Apr '12

08 Apr '12

Yes me again haha :-) I thought it might be a good idea for the less advanced in the group (like me) and others, for members to save there flow chart files in the files section. Like a P25 decode flowchart, using the gr-baz project. FM Demodulation and any other that may be useful.

2 7

./scope.py import error
by allanjs1986 07 Apr '12

07 Apr '12

Hi yes its me again lol. When i try the scope command i get the following. Does this indicate that gnuradio is not installed correctly. ./scope.py -a -v 10 -g 50 Traceback (most recent call last): File "./scope.py", line 40, in <module> from gnuradio import audio, eng_notation, fsk4, gr, gru, repeater ImportError: cannot import name fsk4 I would just like to thank everyone for your support

2 2

New Illinois P25 / DMR Group
by Mark Thompson 05 Apr '12

05 Apr '12

A new group has been created for those interested in the amateur radio use of the commercial digital voice technologies of P25 & DMR in Illinois. You can join the group at: http://groups.yahoo.com/group/IllinoisP25-DMR/ Look forward to your participation in the group.

1 0

Newbie Error question <error: libpcap library not found>
by allanjs1986 05 Apr '12

05 Apr '12

Hi gang i have installed gnu radio and when i get to the ./configure command i get the following error checking for pcap_open_live, pcap_open_dead, pcap_close, pcap_next, pcap_next_ex, pcap_datalink, pcap_inject, pcap_dump, pcap_geterr in -lpcap... no configure: error: libpcap library not found. Thanks for your support Allan

4 7

Post-processing P25 data
by ahenney 30 Mar '12

30 Mar '12

If I record a few seconds of data from an encrypted P25 trunked system, can somebody tell me what type of encryption it is and perhaps the key/logical ID assigned? Thanks, Alan N3LGE

1 0

Another New Member
by ryanharm 26 Mar '12

26 Mar '12

Hi All Im a newbie attempting to install op25 under Cygwin. Will let you all know how that goes. I am slowing working through all the error messages and installing all the missing packages. I work for a large radio equipment manufacturer with an emerging interesting in P25. I can't wait to get op25 installed and see how well it works :) Regards Ryan

1 0

difference between op25.decoder_bf and op25.decoder_ff
by bdapriv01 23 Mar '12

23 Mar '12

Hi Whats the difference between these 2? I'm new to Gnuradio & python to be honest; I'm writing my own ap25 listener for the funcube... So far, I've got my software tuning, FM decoding, and then sending data into the FSK4 decoder; I can see it fine tuning.. but I don't get anything out of the decoder_bf function. Is there any easy way, to debug what its doing?? Digging around in code there doesn't seem to be much debugging. I did create some network sinks, and forward the output of the FM demod to a a scope inside gnuradio companion.. the signal looks like FSK4 with the funky phase changes. Sean

3 3

New member
by op25-dev-owner＠yahoogroups.com 12 Mar '12

12 Mar '12

Hi All, I would like to welcome Harald Welte to the mailing list. Harald is very graciously providing the web hosting for OP25, so here is a big thankyou and welcome :) Cheers, Matt

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