Great news there Gerhard.
Sounds like some real progress on the 2020 mode. All the best, Walter/K5WH From: [email protected] <[email protected]> Sent: Tuesday, May 14, 2019 7:38 AM To: Freetel Codec2 <[email protected]> Subject: Re: [Freetel-codec2] FreeDV 2020 Hi David, Big success! Freedv-gui-brad-2020 is running on Ubunti 18.04 on my new I5-8xxx. I am having SNR 20 in mode 2020 in closed loop and on 20m to the websdr in PA and G above S7 I got full decoding. Just QSB below S7 is kind of a problem. Also tuning is not as easy as in the other modes. So I first had to tune to mode 1600 and than switch to 2020. The audio was connected by simple cables between the Linux and the PC running HPSDR. Made also a first try for satellite work: First I was using a LimeSDR-USB for transmitting on 2,4 GHz using SDR-Console. I recognized a problem in the transmission chain as there were interuptions in the audio in both modes 1600 and 2020. Never had that before, but changed recently to the new Version 3.0.9 of SDR-Console. Have to check again with earlier version. I than changed to DATV-Express hardware and software for SSB. No dropouts, good decoding on 2,4 GHz in mode 1600, but very difficult to get the right tuning in mode 2020. But got SNR 16 in closed RF-loop within the shack. I think at that frequencies the signal jitter and thermal drift is quite serious. Will go on with TX to the satellite and receive by WEBSDR with GPSDO control. First part of tests over satellite no finished. DATV-Express-Card is drifting to much and with LimeSDR I burned my preamplifier. So I fired up my 70cm to 13cm converters. First one was from DX-patrol. This one is also drifting too much and would need a change in hardware with external reference. The other one is from SG-Labs. His one is quite stable, just some jitter is to hear in CW. This one is having the possiblility for having an external reference. Will now hook up the audio from freedv to the FT-897 and go on with my tests. I think it would be helpfull to have pilot tones in mode 2020, same as in mode 1600, to scope with those unstabilities on microwave. A few Hertz more in bandwith would not be any problem at this frequencies. Audio quality was PERFECT!! Thank you for your work. If I can help with further test, please let me know. I am ready for skeds on shortwave now. Regards Gerhard OE3GBB Am 12.05.2019 13:10, schrieb David Rowe: Hi Gerhard, Those sorts of messages to the Linux console are quite normal, just some debug stuff the sound card library prints out. Cheers, David On 12/05/19 18:06, [email protected] <mailto:[email protected]> wrote: Hi David, After installing freedv-gui-brad-2020 I wanted to configure a second sound card. But I get following message: oe3gbb@oe3gbb:~/freedv-gui-brad-2020$ ./build_linux/src/freedv Server listening at 0.0.0.0:45116 pos 1 1 EXCHANGE_DATA_IN: g_nSoundCards: 2 g_soundCard1InDeviceName: HDA Intel PCH: ALC892 Analog (hw:0,0) g_soundCard1OutDeviceName: HDA Intel PCH: ALC892 Analog (hw:0,0) g_soundCard1SampleRate: 44100 g_soundCard2InDeviceName: Logitech USB Headset: Audio (hw:1,0) g_soundCard2OutDeviceName: Logitech USB Headset: Audio (hw:1,0) g_soundCard2SampleRate: 44100 rxInAudioDeviceName: HDA Intel PCH: ALC892 Analog (hw:0,0) rxOutAudioDeviceName: Logitech USB Headset: Audio (hw:1,0) txInAudioDeviceName: Logitech USB Headset: Audio (hw:1,0) txOutAudioDeviceName: HDA Intel PCH: ALC892 Analog (hw:0,0) freedv_get_n_speech_samples(g_pfreedv): 2880 freedv_get_speech_sample_rate(g_pfreedv): 16000 ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side ALSA lib pcm_route.c:867:(find_matching_chmap) Found no matching channel map ALSA lib pcm_route.c:867:(find_matching_chmap) Found no matching channel map ALSA lib pcm_route.c:867:(find_matching_chmap) Found no matching channel map ALSA lib pcm_route.c:867:(find_matching_chmap) Found no matching channel map fifoSize_ms: 440 infifo1/outfilo1: 19404 infifo2/outfilo2: 19404 rxFifoSizeSamples: 3290 I tried with two different USB headsets, result both the same. These are relatively old. Could that be the reason? Regards Gerhard OE3GBB Am 12.05.2019 08:08, schrieb David Rowe: Hello, There's been steady progress on FreeDV 2020 lately: http://www.rowetel.com/?p=6747 This weekend, a few of us around Adelaide had 2020 QSOs to get a feel for the "user factors". There are a few bugs with sync and the Windows build left to work through. Speech quality is very good. In other news, a team of Hams have been working on the software engineering on Codec 2, in particular FreeDV 2020 and stm32: http://www.rowetel.com/?p=6725 Cheers, David _______________________________________________ Freetel-codec2 mailing list [email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[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] <mailto:[email protected]> https://lists.sourceforge.net/lists/listinfo/freetel-codec2
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