Thanks for your response Derek, we are using a FIR filter. I am including the flowchart
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Today's Topics:
1. help: optimizing a fm broadcast flowchart. Getting multiple
stations in a rtlsdr (Luis Roca)
2. Re: help: optimizing a fm broadcast flowchart. Getting
multiple stations in a rtlsdr (Derek Kozel)
3. Re: [USRP-users] Segmentation fault commands to USRP with
gnuradio (samuel verdon)
4. Lock/unlock? (Albin Stig?)
----------------------------------------------------------------------
Message: 1
Date: Wed, 5 Dec 2018 20:54:52 -0400
From: Luis Roca <address@hidden>
To: address@hidden
Subject: [Discuss-gnuradio] help: optimizing a fm broadcast flowchart.
Getting multiple stations in a rtlsdr
Message-ID:
<CALNke=address@hidden>
Content-Type: text/plain; charset="utf-8"
Thanks for this great software. We are tinkering with a setup for listening
to radio and storing the streams as wavs. We have two challenges that we
haven't been able to tackle satisfactorily. Any help would be appreciated.
1. What do we need in order to tune into as many stations as an rtlsdr can
fit in its bandwidth and create wav files for each one. In our setup we use
each sdr for a single station but scaling is a challenge.
2. How can we optimize our existing flowchart ( included screenshot) for
broadcasting wavs from the computer thru a hackRF. We use this for testing
the sdr setup.
Thanks all,
Luis
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Message: 2
Date: Thu, 6 Dec 2018 13:50:09 +0000
From: Derek Kozel <address@hidden>
To: address@hidden
Subject: Re: [Discuss-gnuradio] help: optimizing a fm broadcast
flowchart. Getting multiple stations in a rtlsdr
Message-ID: <address@hidden>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Hi Luis,
At least on my end I can't see an attachment. Since FM broadcast
stations are regularly spaced the polyphase filterbank is a good choice
for separating out each of the individual channels. You can then use the
same demodulation set of blocks and file sink that you're (presumably)
using now to handle each channel.
Regards,
Derek
On 06/12/2018 00:54, Luis Roca wrote:
> Thanks for this great software. We are tinkering with a setup for
> listening to radio and storing the streams as wavs.? We have two
> challenges that we haven't been able to tackle satisfactorily.? Any
> help would be appreciated.
>
> 1. What do we need in order to tune into as many stations as an rtlsdr
> can fit in its bandwidth and create wav files for each one. In our
> setup we use each sdr for a single station but scaling is a challenge.
>
> 2. How can we optimize our existing flowchart ( included screenshot)
> for broadcasting wavs from the computer thru a hackRF.? We use this
> for testing the sdr setup.
>
> Thanks all,
> Luis
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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Message: 3
Date: Thu, 6 Dec 2018 16:48:52 +0100
From: samuel verdon <address@hidden>
To: Marcus M?ller <address@hidden>,
"address@hidden" <address@hidden>
Subject: Re: [Discuss-gnuradio] [USRP-users] Segmentation fault
commands to USRP with gnuradio
Message-ID: <address@hidden>
Content-Type: text/plain; charset="utf-8"
Hi Marcus and Martin,
Thank you for your help!
Do you now how I can follow the problem?
Or if is it already solved, how can I fix it?
Thanks a lot!
Samuel
De?: Marcus M?ller
Envoy? le?:Wednesday, December 5, 2018 13:50
??: address@hidden; samuel verdon
Cc?: Martin Braun
Objet?:Re: [USRP-users] Segmentation fault commands to USRP with gnuradio
<ugly expletive>
this looks like my fault. Not feeling well enough to fix now, but wait
a day and I'll have something to test.
On Wed, 2018-12-05 at 12:56 +0100, Marcus M?ller wrote:
> Hi Samuel,
>
> cool! That's really helpful :)
>
> I'm now cross-posting this to discuss-gr, because it's a GNU Radio-
> land
> issue. The maintainers of gr-uhd are active over there, too, so this
> seems the smarter place to continue discussion.
>
>
> so, in medias res:
>
> On Wed, 2018-12-05 at 12:43 +0100, samuel verdon wrote:
> > #3 0x00007f7f15906700 in pmt::dict_has_key (dict=..., key=...) at
> > /usr/local/src/gnuradio/gnuradio-runtime/lib/pmt/pmt.cc:937
>
> m?p m???p. Our favorite (only) variadic type library leads to
> segfaults.
>
> I'll look into that and be back in a while.
>
> Best regards,
> Marcus
>
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Message: 4
Date: Thu, 6 Dec 2018 17:51:39 +0100
From: Albin Stig? <address@hidden>
To: GNURadio Discussion List <address@hidden>
Subject: [Discuss-gnuradio] Lock/unlock?
Message-ID:
<address@hidden>
Content-Type: text/plain; charset="utf-8"
Does calling lock/unlock on a top block call the stop method on connected
blocks? And does it flush/empty buffers?
--Albin
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