David, quick question. Is 1.5.0/1.5.1 supposed to be backwards compatible with 1.4.3? At least a couple of people have reported that received signals were garbled. (I recorded myself via a WebSDR earlier today and was able to decode myself with 1.5.1, FWIW.)
-Mooneer K6AQ On Sun, Dec 20, 2020 at 2:37 AM David Rowe <[email protected]> wrote: > Hi Al, > > I don't run the QSO.freedv.org website - you'll need to talk to the > maintainer. > > SM1000 support for 700E is possible (it's about the same CPU as 700D), if > some one wants to work on it .... however it would be nice to get the band > pass filter running on the SM1000 to support the clipper/compression. To > date we've left the BPF out of the SM1000 due to CPU, so some optimisation > work required there. > > - David > On 20/12/20 3:34 pm, Al Beard via Freetel-codec2 wrote: > > *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 > <http://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 RMS power you > can develop with 700D/E with the clipper option. > > - David > > > > On 20/12/20 10:30 am, Mooneer Salem wrote: > > > > > > Looks like it's working reasonably well, though the 20 meter band fell > out shortly after we all got it installed. More testing tomorrow for sure. > :) > > > > -Mooneer K6AQ > > > > On Sat, Dec 19, 2020 at 2:26 PM <[email protected]> wrote: > > >> >> Have it loaded and running now. >> > >> > Working on a couple others as I type to get some end to end testing. >> > >> > 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 OFDM compression >> > >> > I've been working on a new FreeDV 700E mode, and some compression for >> FreeDV 700D and 700E to increase the average power. A Christmas present >> for you to play with >> > >> > 700E is designed to handle fast fading like 700C, but like 700D has >> powerful FEC. My bench tests indicate 700C & E are equivalent on moderate >> fading channels (2Hz dopdler/2ms spread), but on very fast fading (4Hz/4ms) >> 700E does better - 700C & D fall over. 700D works better at lower SNRs on >> slow fading channels. >> > >> > I've also been testing against compressed SSB, which as Helmut suggests >> is pretty hard to beat, as it's so robust to fading. However 700E is >> hanging on quite well with fast fading, and becomes noise free as the SNR >> increases. >> > >> > -/- >> > >> > The second innovation is compression of the 700C/D/E waveforms, to >> increase average power significantly. >> > >> > Please be careful adjusting the Tx drive and especially enabling the >> Tool - Options - Clipping. It can drive your PA quite hard. I have managed >> 40W RMS out of my 75W PEP transmitter. Make sure your transmitter can >> handle long periods of high average power. My IC7200 and >> > FT-817 seem OK. >> > >> > At the same equivalent peak power - 700D is doing well when compressed >> SSB is -5dB SNR and rather hard on the ears. >> > >> > -/- >> > >> > Peter VK3RV, Jose LU5DKI, and Barry VK3BRT tried 1.5.0 last night 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 1.5 here: >> > >> > http://rowetel.com/downloads/freedv >> > >> > -/- >> > >> > I'd be interested in any feedback. If you have an interesting test >> case (e.g. a bug or comparing SSB to FreeDV), pls send me off air >> recordings of signals (FreeDV Tools-Record File from Radio). That helps me >> make objective comparisons. Recordings are much more useful to me than >> anecdotes or subjective reports. >> > >> > 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 > [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. > > > > _______________________________________________ > Freetel-codec2 mailing > [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
