Thanks Peter I think I've found that one now, now working through a few other issues.
Cheers, David On 28/01/17 22:13, Peter Reichelt wrote: > hi David > > I have noticed it on both 700c and 700b in the latest release of the GUI > (FreeDV 1.0 dev). It was not there on FreeDV 1.1 which I was previously > using. It is not apparent on 800AX or 1600. > > Cheers > > Peter VK5APR > > > ------ Original Message ------ > From: "David Rowe" <[email protected]> > To: [email protected] > Sent: Saturday, 28 Jan, 2017 At 9:38 PM > Subject: Re: [Freetel-codec2] FreeDV 700C early release > > Hi Ashkay, > > Not sure what the cause is, will look into it over the next few days. > It may be different to the noise you are experiencing as it is only on > 700C. > > Cheers, > > David > > On 28/01/17 19:42, Akshay Mishra wrote: >> Sorry to hijack thread, what is the cause of the /helicopter noise. /I >> observe this occasionally also in my implementation on the STM32 which >> is derived from the stm32 code. It has been interfaced with a IoT >> radio >> and I intend to make it available pretty soon however this helicopter >> noise is a source of irritant. Initially I thought the it is RFI but >> shielding also did not solve it completely. >> >> best, >> Akshay >> >> >> On 28 January 2017 at 09:57, David Rowe <[email protected] >> <mailto:[email protected]>> wrote: >> >> Just had a 30 minute QSO with a local Ham (vk5apr) on 7.177MHz >> using >> 700C. Peter has the Windows version, I have a Linux version of >> FreeDV, >> >> Few little issues I'll look into, like helicopter noises with 700C >> in >> analog mode, and providing a BER estimate. >> >> Our consensus was not as good at 1600, but still quite usable for >> a >> conversation. >> >> We pushed the power level right down until we hit 0dB SNR at which >> point >> the audio started to become unintelligible. At this level the >> modem >> tones were quite down in the noise when listening in analog mode. >> SSB at >> roughly the same level was a 100% copy but noisy. Although hard >> to >> compare power levels exactly. >> >> Next step - would like to try it on a channel with fading. >> >> Cheers, >> >> David >> >> On 28/01/17 07:57, Helmut wrote: >>> Thanks David, I'll check the test waves tomorrow. >>> >>> 73, Helmut >>> >>> -----Ursprüngliche Nachricht----- >>> Von: David Rowe [mailto:[email protected] <mailto:[email protected]>] >>> Gesendet: Freitag, 27. Januar 2017 20:46 >>> An: [email protected] >> <mailto:[email protected]> >>> Betreff: Re: [Freetel-codec2] FreeDV 700C early release >>> >>> Hi Helmut, >>> >>> Hmm, that's a mystery but maybe I have missed something. I can >> run 700c >>> between linux and windows machines here on the bench. I have a report >>> from others running the SVN release below OK. >>> >>> Do the 700c/800xa test wave (links below) files decode for you? >>> >>> Thanks, >>> >>> David >>> >>> On 28/01/17 05:26, Helmut wrote: >>>> Hi David, >>>> >>>> Together with my friend Alfred, HB9EPU, I started today a first >> trial with >>>> early freedv-windows-2996. Alfred used svn 2978 in his particular >>> Linux/SDR >>>> environment. As the test of mode 700C failed, I easily selected >> mode 700B >>>> while Alfred had to move over to 700B using now svn 2299. All >> worked fine >>> as >>>> experienced in the past. >>>> Double check back to 700C: same failure. >>>> >>>> Any ideas, why 700C didn't work? Was there any modification of >> the modem >>>> features? >>>> >>>> 73, Helmut, DC6NY >>>> >>>> >>>> -----Ursprüngliche Nachricht----- >>>> Von: David Rowe [mailto:[email protected] >>>> <mailto:[email protected]>] >>>> Gesendet: Donnerstag, 26. Januar 2017 06:45 >>>> An: [email protected] >> <mailto:[email protected]> >>>> Betreff: [Freetel-codec2] FreeDV 700C early release >>>> >>>> Over the past few months I've been working on a new 700C bit/s >>>> speech >>>> codec. The idea is to make it roughly the same quality as the >>>> FreeDV >>>> 1600 mode but at a lower bit rate so it can punch through HF >>>> channels >>>> better. >>>> >>>> I had a huge response to a recent blog post on the 700C codec: >>>> >>>> http://www.rowetel.com/?p=5373 >>>> >>>> We now have an early version of the FreeDV GUI program for Windows >>>> available, that runs "FreeDV 700C": >>>> >>>> http://rowetel.com/downloads/freedv-windows-svn-2996.tar.gz >> <http://rowetel.com/downloads/freedv-windows-svn-2996.tar.gz> >>>> >>>> Richard is also working on a version with a proper installer, but >> in the >>>> meantime I'd welcome any feedback on 700C/800XA. >>>> >>>> I can't guarantee the bit stream will be stable (hence the early >> release >>>> tag), but I'll let people know if it changes. >>>> >>>> As a bonus it also supports the "800XA" mode developed by Brady - >> which >>>> is the 700C codec with a FSK modem. FSK lets you push a bit more >> power >>>> through your PA than the normal PSK modem used for FreeDV 700C. It >>>> might also let the smoke out of your SSB PA so pls be careful. >>>> >>>> Here are some wave file you can use to test 1600/700C/800XA: >>>> >>>> http://rowetel.com/downloads/codec2/ve9qrp_1600.wav >> <http://rowetel.com/downloads/codec2/ve9qrp_1600.wav> >>>> http://rowetel.com/downloads/codec2/ve9qrp_700c.wav >> <http://rowetel.com/downloads/codec2/ve9qrp_700c.wav> >>>> http://rowetel.com/downloads/codec2/ve9qrp_800xa.wav >> <http://rowetel.com/downloads/codec2/ve9qrp_800xa.wav> >>>> >>>> Play them into FreeDV using the "Tools-Start/Stop Play File from >> Radio" >>>> option. >>>> >>>> Thanks, >>>> >>>> David >>>> >>>> >>> >> >> ---------------------------------------------------------------------------- >>>> -- >>>> Check out the vibrant tech community on one of the world's most >>>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>>> _______________________________________________ >>>> Freetel-codec2 mailing list >>>> [email protected] >> <mailto:[email protected]> >>>> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >> <https://lists.sourceforge.net/lists/listinfo/freetel-codec2> >>>> >>>> >>>> --- >>>> Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. >>>> https://www.avast.com/antivirus <https://www.avast.com/antivirus> >>>> >>>> >>>> >>> >> >> ---------------------------------------------------------------------------- >>> -- >>>> Check out the vibrant tech community on one of the world's most >>>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>>> _______________________________________________ >>>> Freetel-codec2 mailing list >>>> [email protected] >> <mailto:[email protected]> >>>> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >> <https://lists.sourceforge.net/lists/listinfo/freetel-codec2> >>>> >>> >>> >> >> ---------------------------------------------------------------------------- >>> -- >>> Check out the vibrant tech community on one of the world's most >>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>> _______________________________________________ >>> Freetel-codec2 mailing list >>> [email protected] >> <mailto:[email protected]> >>> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >> <https://lists.sourceforge.net/lists/listinfo/freetel-codec2> >>> >>> >>> --- >>> Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. >>> https://www.avast.com/antivirus <https://www.avast.com/antivirus> >>> >>> >>> >> >> ------------------------------------------------------------------------------ >>> Check out the vibrant tech community on one of the world's most >>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >>> _______________________________________________ >>> Freetel-codec2 mailing list >>> [email protected] >> <mailto:[email protected]> >>> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >> <https://lists.sourceforge.net/lists/listinfo/freetel-codec2> >>> >> >> >> ------------------------------------------------------------------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >> _______________________________________________ >> Freetel-codec2 mailing list >> [email protected] >> <mailto:[email protected]> >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >> <https://lists.sourceforge.net/lists/listinfo/freetel-codec2> >> >> >> >> >> >> ------------------------------------------------------------------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >> >> >> >> _______________________________________________ >> Freetel-codec2 mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >> > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
