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<div dir="auto">Thanks for the good update, Tom. Very nice. </div>
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<div dir="auto">73 Nathaniel W2NAF </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> TangerineSDR <tangerinesdr-bounces@lists.tapr.org> on behalf of Bob Stricklin via TangerineSDR <tangerinesdr@lists.tapr.org><br>
<b>Sent:</b> Saturday, August 26, 2023 2:58:41 PM<br>
<b>To:</b> TAPR TangerineSDR Modular Software Defined Radio <tangerinesdr@lists.tapr.org><br>
<b>Cc:</b> Bob Stricklin <bstrick@n5brg.com><br>
<b>Subject:</b> Re: [TangerineSDR] Good progress with KA9Q and Gnuradio</font>
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<div class="PlainText">This is good news. Nice job to all involved.<br>
<br>
Bob N5BRG<br>
<br>
> On Aug 26, 2023, at 9:58 AM, Tom McDermott via TangerineSDR <tangerinesdr@lists.tapr.org> wrote:<br>
> <br>
> I would like to say thank you to Franco, K4VZ and Phil, KA9Q for lots of great help this last week.<br>
> <br>
> I have been successful in getting a Raspberry PI 3B+ with an RTLSDR dongle working to send IQ data to Gnuradio<br>
> on a separate Linux host using the updated version of ka9q-radio.<br>
> <br>
> 1. When the host is run on a different computer than the radio is on (i.e. over a network) then<br>
> one needs to add ttl = 1 to the .conf file (ttl means time-to-live for the packet) Without the ttl parameter<br>
> it defaults to ttl = 0 such that the Raspberry Pi never sends multicast data or multicast control over the<br>
> network connection (just to the RPi's loopback address). My network has IGMP snooping turned on so<br>
> that multicast packets are only sent on network ports with active subscribers). The multicast names<br>
> are properly resolving to IPv4 across the network.<br>
> <br>
> 2. There were some buffer problems that resulted in long runs of zero-valued samples interspersed within<br>
> the IQ data. I had them all the time with my setup, Franco had them intermittently with his. This is working now on<br>
> my setup after pulling the Aug 24 update from the ka9q-radio github.<br>
> <br>
> 3. Franco's Gnuradio module seems to be working great without issues on my setup (Ubuntu 22.04 / gnuradio 3.10).<br>
> It receives the IQ stream from the RTLSDR over the network and can tune the output and demodule<br>
> NWS weather stations within gnuradio producing audio output. It shuts down properly.<br>
> <br>
> 4. Phil's control program is now working (due to fix #1 above).<br>
> <br>
> 5. This has been tested so far at 48000 samples/sec so far. The Raspberry Pi 3B+ is running about 30% load<br>
> when sending this one multicast stream.<br>
> <br>
> 6. There are further tests planned (sample rate, RX888, etc.).<br>
> <br>
> <br>
> Again many thanks to Franco and Phil ! I know they spent a lot of time on this over the week.<br>
> <br>
> -- Tom, N5EG<br>
> <br>
> <br>
> -- <br>
> TangerineSDR mailing list<br>
> TangerineSDR@lists.tapr.org<br>
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