Re: [Discuss-gnuradio] Getting time each time power squelch is on

[Luis Colunga]

Hi, sreeraj,

I figured out what you meant by the math manipulations. Thanks

I based on the example of the uhd energy detector.py for modifying the
output of the power squelch to use it as a trigger on burst tagger.

I see that if I put on audacity 32bit float it's  going to interpret
the file created by the tagged file sink right.

Thanks all of you :)



2015-01-04 16:03 GMT-07:00 Luis Colunga <address@hidden>:
> Hello sreeraj,
>
> I am checking those examples, thanks. Can you elaborate with what you
> mean with math manipulations?? Even if I am using tagged_file_sink can
> I interpret what is generated as if they were audio wav files?
>
> Thank you.
>
> 2015-01-04 4:43 GMT-07:00 sreeraj r <address@hidden>:
>> On Sat, Jan 3, 2015 at 8:39 PM, Luis Colunga <address@hidden> wrote:
>>>
>>> Hi Dan,
>>>
>>> Thanks for the response, but it seems like burst tagger would not work
>>> in this case because I am working with audio. What I want is when
>>> power squelch is triggered demod a NFM signal and then save it to a
>>> wav file with the time power squelch was triggered.
>>
>>
>> You can try keeping power squelch's gate to false (so that you will get zero
>> samples) and then use it as a trigger for "burst_tagger" after doing some
>> math manipulations. This along with a "tagged_file_sink" should work.
>>
>> Please look into "gnuradio/examples/tags" for examples.
>>
>> Sreeraj
>>
>>>
>>>
>>> Thanks
>>>
>>> 2015-01-02 16:12 GMT-07:00 Dan CaJacob <address@hidden>:
>>> > Hi Luis,
>>> >
>>> > I am pretty certain there is a block in mainline GR to do this with
>>> > tagging.
>>> > Burst tagger maybe?  The tags define the burst boundaries and a
>>> > timestamp is
>>> > recorded as well.
>>> >
>>> > On Jan 2, 2015 5:46 PM, "Luis Colunga" <address@hidden> wrote:
>>> >>
>>> >> Hello,
>>> >>
>>> >> I have a Python handcoded block in which I want every time that power
>>> >> squelch is triggered, grab the actual time and then use that filename
>>> >> to write a wav file with a decoded stream.
>>> >>
>>> >> What would be a good approach? I tried using variables but I see they
>>> >> don't update at runtime and I am not sure if you are able to change
>>> >> the wav sink name on runtime and just expect it to work or if it
>>> >> neccesary to do something else there.
>>> >>
>>> >> Thanks.
>>> >>
>>> >> _______________________________________________
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>>>
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>>
>>
>>
>>
>> --
>> Regards
>> Sreeraj Rajendran
>> http://radioninja.in/