Hi Just some other ideas:
*NIX-type systems: "write" or "mail" the local user Windows: balloon tip Android: push notification The most flexible way might be to just have the user put in something in a textbox(es) that gets executed by system() or execve(). Like "/bin/bash /home/username/mynotificationscript.sh". socat could then be used to send UDP packets. Or you put in a call to write. Or something else. /Tomas ons 2018-05-16 klockan 08:35 +0930 skrev David Rowe: > Hello Alan (and list), > > I'm working on a simple way to alert me when someone is calling on > 7.177MHz on 700D, but I am away from the radio. > > As a first step I'll make FreeDV send a message to a UDP socket on > localhost when it detects sync, I can then write a Linux script to > msg > me somehow. > > Cheers, > > David > > On 15/05/18 17:17, Alan Beard wrote: > > Hi all, > > > > I've been listening and transmitting on 7177KHz LSB but hear > > nobody. > > 14150 and 14153 both have interference here so I've occasionally > > tried > > on 14236KHz but again nothing. > > > > I've "asked" on VKLOGGER and AHRDF. It seems there's all but nobody > > willing to compile the sourcecode and run it except Mark VK5QI and > > me. > > http://ahrdf.net/ and http://www.vklogger.com/ > > > > Does this show, just how few hams have Linux expertise? > > > > I have not switched on a Windoze box for months, no need. > > > > Anyway, I'm looking forward to some on-air tests. > > > > No 73 valves here, nearest here a 6BK4. > > > > Alan VK2ZIW > > > > On Mon, 7 May 2018 13:50:17 +0200, Helmut Oeller wrote > > > Hi Glen, > > > > > > very interesting paper! Thanks for sharing the link. Yes, I agree > > > that a realible 'simulator' providing the real world of a HF > > > channel > > > would be very helpful to compare communication modes. Man-made > > > noise > > > caused by PLC or SMPS etc. is another challenge especially on HF > > > bands. Before I'll stop my laudation for the 'old' SSB another > > > example what advanced DSP algorithms can effect in bad man-made > > > noise enviroment: > > > > > > https://www.dropbox.com/s/wt32pepaurnbvbq/W5WC_NB%2CSNB%2CNR2_OFF > > > .mp3?dl=0 > > > > https://www.dropbox.com/s/tubqmidw4bor265/W5WC_NB%2CSNB%2CNR2_ON.mp > > 3?dl=0 > > > > > > Hopefully nobody feels offended by my lanky posts, but after more > > > than 50 years with activity on the commercial side of > > > communications > > > I think that I earned a ticket for my point of view. > > > > > > 73, Helmut, DC6NY > > > > > > -----Ursprüngliche Nachricht----- > > > Von: glen english <g...@cortexrf.com.au> > > > Gesendet: Montag, 7. Mai 2018 01:42 > > > An: freetel-codec2@lists.sourceforge.net > > > Betreff: Re: [Freetel-codec2] 700D vs SSB Comparison > > > > > > Hi David > > > > > > fair enough > > > > > > here is some good and reasonable recent work by one of your > > > own..... > > > > > > > > > > http://search.ror.unisa.edu.au/record/UNISA_ALMA11140739050001831/m > > edia/digita > > l/open/9916110811201831/12140739040001831/13140739030001831/pdf > > > > > > Maybe build into freeDV some sort of recording to disk and FTP > > > upload to codec2 server.... > > > > > > On 7/05/2018 9:02 AM, David Rowe wrote: > > > > The 700D waveform is designed for subset of those paths. As > > > > part of > > > > the testing I'd like to crowd source some samples of where it > > > > works > > > > and were it doesn't. > > > > > > > > Long term - if the average SNR is there, a waveform can be > > > > designed to > > > > pass DV over it. Eventually. > > > > > > > > DV over HF is a tough problem, and every development consumes > > > > 1000's > > > > of volunteer man-hours (mainly mine). So I'm taking a > > > > tractable path > > > > through the problem. > > > > > > > > Currently the focus is on low SNR HF channels. I'll make > > > > incremental > > > > improvements from there, e.g. rarer HF paths, higher speech > > > > quality at > > > > higher SNRs etc. > > > > > > > > - David > > > > > > > > On 07/05/18 07:45, glen english wrote: > > > > > SSB sometimes wins because the brain picks up the slack. like > > > > > with a > > > > > 0.5 second fade. > > > > > > > > > > In my opinion, for HF paths, to be broadly useful , voice DV > > > > > modes > > > > > need to pass an HF fading simulator, targeted at vertical > > > > > incidence > > > > > work, and bear in mind, that the channel profiles are quite > > > > > different > > > > > for Equatorial, Mid latitude and high latitude locations. And > > > > > they > > > > > must have minimal conversational delay, , < 0.25 seconds. > > > > > > > > > > take a look at > > > > > > > > > > https://www.itu.int/dms_pubrec/itu-r/rec/f/R-REC-F.1487-0-200 > > > > > 005-I!!PDF- > > > > E.pdf > > > > > > > > > > > > > > > several languages : > > > > > > > > > > https://www.itu.int/rec/R-REC-F.1487-0-200005-I/en > > > > > > > > > > > > > > > > > > > > This article, is useful for its 127 excellent references, > > > > > https://link.springer.com/article/10.1007/s11235-017-0287-2#C > > > > > R38 > > > > > > > > > > and has some excellent channel profile references . > > > > > > > > > > > > > > > From the DRM spec, Annex B Definition of channel profiles > > > > > Channel 6, path 4 > > > > > delta delay : 6mS, path gain RMS = 0.0625, dopplershift : > > > > > 3.6Hz, > > > > > dopper spread 7.2Hz > > > > > > > > > > Some paths are worse than that .. especially vertical > > > > > incidence paths > > > > > what have values almost triple the above numbers.... > > > > > > > > > > > > > > > ----------------------------------------------------------- > > > > > -------------- > > > > ----- > > > > > > > > > > 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 > > > > > Freetel-codec2@lists.sourceforge.net > > > > > 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 > > > > Freetel-codec2@lists.sourceforge.net > > > > 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 > > > Freetel-codec2@lists.sourceforge.net > > > 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 > > > Freetel-codec2@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > > > > > Alan > > > > Evil flourishes when good men do nothing. > > Consider the Christmas child. > > ----------------------------------------------------------------- > > ---------- > > Alan Beard Unix Support Technician from 1984 to today > > 70 Wedmore Rd. Sun Solaris, AIX, HP/UX, Linux, SCO, MIPS > > Emu Heights N.S.W. 2750 Routers, terminal servers, printers, > > terminals etc.. > > +61 2 47353013 (h) Support Programming, shell scripting, "C", > > assembler > > 0414 353013 (mobile) After uni, electronics tech > > > > > > ----------------------------------------------------------------- > > ------------- > > 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 > > Freetel-codec2@lists.sourceforge.net > > 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 > Freetel-codec2@lists.sourceforge.net > 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 Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
