Thanks David, I've recompiled the Codec2 library with the latest on my "parrot" repeater.
(Fedora 30 armv7hl) (a Pi clone, Banana Pi M2 Berry) But error: /data/home/alanb/bin/parrot: undefined symbol: freedv_get_uncorrected_errors I'll look into that.... I've compiled the Ver 1.5 devel FreeDV GUI on Fedora 29 x86_64, my "main" box. We are having some good Sporadic E openings on 10m and 6m between here and New Zealand. Can we have some frequencies on the QSO.freedv.org website for bands 17m and up such that there is a "standard" on each band? Also, is there a possibility the SM1000 can run mode 700E? Alan VK2ZIW On Sun, 20 Dec 2020 13:50:33 +1030, David Rowe wrote > Thanks Walter and Mooneer. I'd be interested to know the RMSpower you can > develop with 700D/E with the clipper option. > - David > > On 20/12/20 10:30 am, Mooneer Salemwrote: > > Looks like it's working reasonably well, though the20 meter band fell out > shortly after we all got it installed.More testing tomorrow for sure. :) > > -Mooneer K6AQ > > On Sat, Dec 19, 2020 at 2:26PM <[email protected]> wrote: > Haveit loaded and running now. > > Working on a couple others as I type to get some end to endtesting. > > Many thanks David, and best of the holidays. > > Walter/K5WH > > -----Original Message----- > From: David Rowe <[email protected]> > Sent: Saturday, December 19, 2020 3:34 PM > To: [email protected] > Subject: [Freetel-codec2] FreeDV 1.5 - 700E and OFDMcompression > > I've been working on a new FreeDV 700E mode, and somecompression for FreeDV > 700D and 700E to increase the averagepower. A Christmas present for you to > play with > > 700E is designed to handle fast fading like 700C, but like700D has powerful > FEC. My bench tests indicate 700C & Eare equivalent on moderate fading > channels (2Hz dopdler/2msspread), but on very fast fading (4Hz/4ms) 700E does > better -700C & D fall over. 700D works better at lower SNRs onslow fading > channels. > > I've also been testing against compressed SSB, which as Helmutsuggests is > pretty hard to beat, as it's so robust to fading.However 700E is hanging on > quite well with fast fading, andbecomes noise free as the SNR increases. > > -/- > > The second innovation is compression of the 700C/D/Ewaveforms, to increase > average power significantly. > > Please be careful adjusting the Tx drive and especiallyenabling the Tool - > Options - Clipping. It can drive your PAquite hard. I have managed 40W RMS > out of my 75W PEPtransmitter. Make sure your transmitter can handle > longperiods of high average power. My IC7200 and > FT-817 seem OK. > > At the same equivalent peak power - 700D is doing well whencompressed SSB is > -5dB SNR and rather hard on the ears. > > -/- > > Peter VK3RV, Jose LU5DKI, and Barry VK3BRT tried 1.5.0 lastnight and report > it works on real HF channels. > The latest manual describes the new features: > > https://github.com/drowe67/freedv-gui/blob/118cb66ee4679518185db871ec0ae68071c406a4/USER_MANUAL.md > > You can download Windows 32 and 64 bit versions of FreeDV 1.5here: > > http://rowetel.com/downloads/freedv > > -/- > > I'd be interested in any feedback. If you have an interestingtest case (e.g. > a bug or comparing SSB to FreeDV), pls send meoff air recordings of signals > (FreeDV Tools-Record File fromRadio). That helps me make objective > comparisons. Recordingsare much more useful to me than anecdotes or > subjectivereports. > > Thanks, > David > > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > > _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2 --------------------------------------------------- Alan VK2ZIW Before the Big Bang, God, Sela. OpenWebMail 2.53, nothing in the cloud.
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