Hi All,
The missing blank after --cref in Makefile is corrected in
Makefile.in now so a proper Makefile will be produced by
the ./configure command. I have replaced the lir01-35.tbz
file with the corrected one. There is no change in the
code and the linrad executable becomes identical to what
it
Hi Roger,
> I used to derive my frequency data like this:
>
> /*
> freqpre=fg.passband_center;
> freqpre=freqpre*10E6;
> freq=(mix1_fq_mid[fftx_nx]);
> freq=freq*10;
> freq=freq+freqpre-48;
> freq=freq*100;
> */
> where fg.passband_center and mix1...are linrad variables. This now
> gives err
Hi All,
Linrad-01.35 may crash when run under Debian Etch and ALSA. This
happens if the soundcards are set up incorrectly so ALSA reads
zero for every single sample. It is the zero noiselevel that
causes the crashes. This is fixed in Linrad-01.36 so reading
zero will just cause a zero spectrum.
Hi All,
Linrad-02.04 is now uploaded. The multi-threaded version might still be
a bit unreliable, but I think it has reached a level where it could be
used on a regular basis.
This version can be compiled for X11 as well as for svgalib and
Windows. It also has support for the SDR-14 hardware unde
Hi All,
I have started to collect some examples of different ways to run Linrad
at this URL: http://www.sm5bsz.com/linuxdsp/usage/examples.htm
The first example is with a fast waterfall on which CW is readable and
filter choices for a very fast response. The delay from antenna to
loudspeaker can
Hi again,
Sometimes, when correcting a minor bug I introduce a
more serious one:-(
Do not use 01-36, linrad-01.37 is the latest, hopefully stable
version of (single-threaded) Linrad.
73
Leif / SM5BSZ
#
This message is sent to you be
Hi Arne and all,
> I'm not able to download wlr2-04,zip
> Sidan kan inte visas HI
Sorry, but the file is in place now:-)
I have already had two reports saying 02-04
does not work so maybe it is better to stay
with 02-03 for a while if you want to run under
Microsoft. I have presently no idea what
Hi All,
There have been many reports on problems during setup.
Some of them are probably due to insufficient ram memory
(Too large storage times selected.)
Under svgalib the user has the option to select whether
mlockall should be used to detect swapping to disk. This
works fine on older computer
Hi Roger,
> THis is just some 'user feedback' from 1.37 and 2.05 ;)
>
> Windows:
> Linrad-02.05 is working fine so far. I haven't made it fail under windows.
>
> Linux:
> LInrad 01.37 seems to work fine here at home. I haven't put it thru its
> paces at Hilltop yet.
> LInrad-02.05 works fine
Hi Ramiro,
> I have just downloaded Linrad-02.05 and I can go a little bit further
> but It crashes again. This is the sequence of commands
>
>
> I press "S"
> I choose "1" font size.
> I choose "N" to allow swapping.
>
> I press "A" for weak signal CW
> I choose device 63 /dev/dsp
> I ch
Hi Ramiro and Bob,
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 1145924528 (LWP 6020)]
> 0x080a7bb1 in rx_output ()
> (gdb) where
> #0 0x080a7bb1 in rx_output ()
> #1 0x in ?? ()
> (gdb) Quit
> (gdb)
--
Hi Pierre,
> In case xlinrad 02.06 is not yet out, could you have a look at the conversion
> logic of the X keycodes to ASCII codes?
Hmmm, I do not understand it.
It operates on strings. I have tried to compile it, but I can
not make it work.
I want key-presses to be sent to Linrad one by one so
Hi Bob,
> The first one cannot know whether or not a separate thread using a
> pointer or the variable has initialized the contents. In the second,
> typically the construct inside the
>
> if (A ==0) {
> }
>
> braces, requires that A be initialized to zero and that some action
> required b
Hi All,
Thanks to all the feedback and good suggestions
Linrad-02.06 should be significantly better than
the previous version(s) under X11.
For svgalib the differences are small but under
Windows as well as X11 Linrad now answers to
the numeric keyboard which was not the case before.
73
Leif
Hi Pierre and all,
> Many thanks for linrad 02.06
> The only 'programming' I had to do was to comment out line 1630 in lsetad.c
> to
> remove a trace entry :-)
Oooh! I forgot to check for them. There are some other ones as well
I have replaced 02-06 by 02-06a. A few arrays are cleared also
Hi All,
When running valgrind on the current xlinrad I get the
following report on lost memory:
==8510== IN SUMMARY: 17 errors from 10 contexts (suppressed: 19 from 1)
==8510==
==8510== malloc/free: in use at exit: 24,056 bytes in 319 blocks.
==8510== malloc/free: 691 allocs, 372 frees, 290,094,
Hello Richard,
> Lost memory is allocated when an object in C++ is created , but not
> released when the object is destroyed. This is usually performed by the
> destructor for the class if the class has been written properly.
???
I have seen similar text before, but it does not tell
Dear Joe,
> In valgrind's terminology, "lost memory" is synonymous with a "memory
> leak" - memory which has been malloc'ed but not free'ed. In general, the
> operating system will reclaim this memory when the program terminates -
> you do not necessarily need to wait until the next reboot.
Oooh
Hello Ramiro,
> xlinrad crashes under Debian Sarge and shows the following Segmentation
> Fault debbuged with gdb. I send it to you just in case it gives you some
> clues. Is the 890=0x37A port a parallel port register? What is it used
> for under Linrad?
Linrad uses the parallel port to contro
if / SM5BSZ
>
> No doubt there are more accomplished programmers who could advise..
>
> Richard
>
>
> Leif Asbrink wrote:
>
> >Hello Richard,
> >
> >
> >
> >>Lost memory is allocated when an object in C++ is created , but not
&g
Hi Richard,
> One of the principal ideas in C++ is to encapsulate the object and
> present a consistent interface
>
> If XCreateFontCursor is a class (it may not be)
> the class code will be often in a header file say "xCreateFontCursor.h"
> and a code file say "xCreateFontCursor.cpp" (However
Hi Pierre,
> If I enter Y ( DA STOP/START [1] in par_userint ) everything works fine.
> If I enter N ( DA STOP/START [0] in par_userint ) xlinrad issues an error
> message 23855 when a new signal is selected .
When something goes wrong with the device drivers (which was not
uncommon at all in t
Hi All,
Known bugs are now corrected:-)
The transfer to multi-thread is not yet complete
because all calls to the error handling routine
lirerr(int error_code) have to be followed by a
test for an error condition followed by a conditional
return to the calling routine. 370 such calls need
to b
Hi Ramiro,
> -- sgvalib linrad 02.07 works for some while and segfaults:
>
> svgalib: signal 4: Illegal instruction received
> svgalib: signal 11: Segmentation fault received
I have not been able to reproduce. I have tried Sarge
with the 2.6.8 kernel but it just runs fine. The 8-bit
A
Hi Bob and all,
> If we use PortAudio, we can have a SINGLE sound system API for all
> operating systems and be able to immediately extend your Xlinrad to at
> least Intel based OSX boxes (since Portaudio presents a single API for
> sound on Windows, Linux, and OSX) and run this code on Window
Hello Ramiro,
> I also have not been able to reproduce the bug on my desktop computer.
> The bug shows only on my laptop computer.
>
> I have been trying to run Linrad under gdb and valgrind but any of them
> allows it. I cant run Linrad within them.
This seems odd, I thought that an X11 install
Hello Ramiro,
> I have just compiled svgalib 1.9.24 and linrad works great using
> NO_HELPER mode! No crashes, it works just fine.
>
> Can we conclude it was a svgalib bug?
I think so. But one can never be 100% sure. There could be
a bug in Linrad that 1.9.24 is not bothered about.
On the othe
Hello Daniel,
> I find it somewhat difficult to grab the thin white border
> lines for changing window sizes
This is a compromise. Screen space is a limited resource and
many more things are planned to be present simultaneously.
The idea is that you will find your favourite layout and leave
it
Hi All,
Linrad-02.08 is now uploaded. With this version I
hope the multi-threaded structure is stable.
The Microsoft Windows version is still incomplete,
it does not have any srive routines for hardware yet.
The X11 version should now have all the functions
that are available with svgalib. If yo
Hi All,
I forgot to verify that Linrad runs under 16 and
24 bit colors after finally succeeding to get
the 8 bit color palette working. Debian has no
simple tool to change the color depth, one has to
find out (again) what file to edit.
Linrad 02-08 works ONLY with 256 colours!
Thanks to Roge
Linrad-02.08 only works when you have selected
256 colours for your X server. I do not understand
the error messages you report but presumably you
did not observe my posting about this.
Other importand bugs in 02-08 :
Screen does not refresh often enough if fft2 is
enabled. Affects Win and X11
Hi All,
If you have detected bugs in Linrad-02.08 and
not seen any reference to your problem on this list,
please send a bug report now.
I am testing Linrad-02.09 on various systems
and 02.08 bugs reported within the next 24 hours
will (hopefully) be corrected in 02-09.
73
Leif / SM5BSZ
#
Hi All,
Linrad-02.09 can use the parallel port thanks to the
inpout32.dll that Roger pointed me to.
After having found out how to access a dll file I
also added support for the SDR-14 hardware in the
Windows version.
To make the port of Linrad to Microsoft complete I
need help with the followi
Hi Zaba,
Please save all par files first so there is no risk that
you can not reproduce this bug. Then copy the par_wcw
or whatever mode causing the problem from an earlier
version that was ok. For par_userint, use a text editor
to make the 09 parameters equal to the ones previously
used.
In cas
The bug reported by Zaba (pixels outside screen)
is present regardless of operating system.
Linrad-02.09 does not allow an expanded X-scale in
the baseband graph. As a work-around, edit your
file(s) par_xxx_bg and set pixels/point to 1.
73
Leif / SM5BSZ
###
Hi All,
The bug in 02-09 that does not allow expanded
X-scales in the baseband graph is corrected.
I made a silly mistake when putting back yellow
dots that were cleared when the BFO was moved
across the filter curve. (And forgot to test
this "improvement" in an expanded X scale...)
Before up
Hi All,
Linrad-02.10 is now uploaded.
The time to announce "Linrad for Windows" to a wider
audience is approaching. I am not planning any changes
other than those motivated by bug reports until after
a stable linrad-02.xx is established.
Bug reports are particularly welcome!
73
Leif / SM5BSZ
Hi Zaba,
> While I forgot it running in the background,
> I noticed a new error (maybe an oldie to you):
>
> [1224]Overrun error. Is Linrad swapped to disk??
Linrad allocates buffers for the input thread
that span 0.3 seconds. In "normal usage" for CW
and SSB one wants a delay from antenna to lo
Hi All,
The X11 screen update "mystery" is solved. It was
a stupid mistake of mine and not a problem with
the X11 server;-)
As it turns out, the SDR-14 device driver for Windows
does not like writes to happen while reads take place
which causes problems with frequency and gain control
with the mo
Hi Zaba,
> Version wlr 2.11 works fine (even in parallel with a
> DVB-application; small screen digi-tv on top of Linrad).
Good:-)
> The only aberration I see in comparison with former versions
> is the switch-over from the lower left corner Delay time info
> (T) back to the Amplitude margins (A
Hi Ermanno,
> Version 2.11 works fine with svgalib and
> in X11 windows (Mandriva 2006).
Fine:-)
> If is present users_hwaredriver I must have
> moved the definition of the variable "int
> sdr14_att_counter" and "int sdr14_nco_counter"
> before the includes "users_hwaredriver.c" in
> the mo
Hi All,
This time the changes are not so small as compared to
the previous version. I think all the bugs and problems
that have been reported are solved, but I may have
introduced new problems at other places since the way
how threads control the operation of each-other has
been changed.
Reports
Hi All,
The Linrad versions are named linrad-xx.yy according
to the Linux naming conventions. By mistake, the
latest version unpacks as linrad-02-12. This is
now corrected and the new lir02-12.tbz will
unpack to linrad-02.12 but there are no changes
whatsoever in the code so there is no reason
to
Hello Zaba and all,
> Each wlr-version seems to show a marked improvement,
> and undoubtedly that is the case on the Linux side too.
Yes:-)
> On a 1024 x 768 TFT WinXP_laptop the lower part of the
> window cuts out the "Floor" indication (A) and the "Tot"
> time summary (T). On Win2k systems thos
Hi Shawn,
> I am new to Linrad, but not so to Linux, been fiddling with it for 5 years
> or so. Is there a FAQ available? I am having trouble with the build
> 2.12 with Kernel 2.6.14, kernel version error. My C is basically
> non-existent and the edit for the kernel.c file is kind of cryptic.
>
Hello Rob,
> screen.c: In function `screen':
> screen.c:1706: `thread_flag' is hier niet gedeclareerd (eerste gebruik in
> deze functie)
> screen.c:1706: (Elke niet-gedeclareerde naam wordt slechts één
> screen.c:1706: keer vermeld voor elke functie waarin hij staat.)
> make: *** [screen.ol] Fout
Hi Chris and all,
> > kernver.c is a stupid fix to a trivial problem. I am sure there
> > is a proper way to do it, but I have not been able to figure
> > out how to determine the version number for the kernel to
> > have it available at compile time.
>
> Would something like this in a bash scrip
Hi Chris,
> case "$kernver" in
> "Linux 2.2")
> ...
> ... ;;
> "Linux 2.4")
> ...
> ... ;;
> *)
> echo "Unknown kernel $kernver";;
> esac
>
> See http://www.tldp.org/LDP/abs/html/testbranch.html for the full
> gory details.
This "programming language" is really difficult.
I can not make
Hi All,
A new version is uploaded. All known bugs
are corrected and two new parameters in
par_userint allow X11 and Windows users to
set the size of the window.
(Under Windows the window is actually always the
same size, but Linrad believes it is of the
size defined by the parameters so one can
Hi Chris,
Linrad-02.14 will have something similar:-)
Thanks and 73
Leif 7 SM5BSZ
> I have tested the following shell script for various values of v; the
> variable _is_ substituted within the cases:
>
> #!/bin/sh
> v="Linux 2.4"
> case "$v" in
> "Linux 2.2")
> echo "2.2 found (v=$v)"
> ;;
Hi All,
My Debian Etch has been completely stable and I have
not rebooted it for months. Recently I tried to
change back to ALSA after a sucessful install of OSS
while OSS was running. That failed but seemingly did no
harm. After stopping ALSA I tried to remove and then
reinstall ALSA with apt-get
Hi All,
Linrad-02.14 is now available at the usual locations:
http://www.sm5bsz.com/linuxdsp/linrad.htm
http://nitehawk.com/sm5bsz/linuxdsp/linrad.htm
http://g7rau.demon.co.uk/sm5bsz/linuxdsp/linrad.htm
The g7rau site does not work with Firefox but it
is ok for Internet Explorer.
Linrad-02.14 co
Hi Zaba and all,
> As radio DX-peditions to rare spots very often hit environments
> with a poor electricity network and a lot of interference sources,
> it would be nice to have some ready dedicated hardware packages
> to allow these expeditions to enjoy optimum reception during
> difficult p
Hi All,
This is only for those of you who run Debian Etch.
Running "apt-get upgrade" may make your system
impossible to boot. For a while I thought my
hard disk was corrupted because the last thing I had
done before rebooting was to try the SDR-14 which
did not work (2.14 under X11/Debian)
Now
Hi Roger and All,
> This is another post regarding problems I am
> seeing with the Presonus Firebox. I am hoping
> for one of the I/Q gurus to help me figure out
> what is going on. My questions are basically:
>
> 1. What is happening?
> 2. Is it a hardware or software problem?
> 3. Is thi
Hi All,
I have happily been using FTP to move files between
computers although I have only been able to get it
running on a few systems. (Red Hat 9 and Debian Etch)
After upgrading Debian I can no longer FTP.
This is the message:
500 OOPS: cannot locate user entry:ftpsecure
The file /etc/vsftp
Hi Zaba,
To run xlinrad you must be logged in as root to
have the permission to use parallel ports. If you
select not to use any, then it should be ok to go
as a normal user.
(Personally I am always root, I can not comment
to normal user problems because of ignorance...)
> Now after executing 'm
Hi Roger and all,
> Around 2000 or so when I built my simple EME receiver to use with Linrad,
> it looked like the AD797s had the best noise specs and so this is what I
> used.
>
> Now it seems that some of the cognoscenti tout the LT1128A and don't even
> mention the AD797.
>
> The typica
Hi Zaba,
> It seems that the hash table is no show-stopper at present, according
> to Leif's recent observations. Lasse/OH5XP advised me to use additional
> commands like xhost +localhost as Knoppix does not allow direct root
> logins like in the old pre-version4 days. In between I ran 'alsaconf
Hi Jan and all,
The frequency control box is removed from the screen when
there is no hardware to send data to. You may add your
own users_hwaredriver.c by renaming users.c
This way you can tell Linrad how you want the frequency
control box to behave.
Change the routine users_open_devices(void)
Hi All,
Linrad-02.15 is now uploaded. Besides a few bug fixes
the main difference is that data files generated by
Linrad go into dedicated directories. These data
files are defined in a new header file: options.h
This file also contains other compile time options
(debug tools) that previously wer
Hello all,
With Linrad-02.15, the coherent graph adjusts its
size better for different font sizes. While doing
these changes I forgot to remove a provocation
to put the graph at its default position always.
To make Linrad-02.15 remember the position for
the coherent graph, change lines 428 and 4
If you want to add your own things into Linrad
using extra.c from version 02-15 you have to
correct the first line which reads:
#incluse
The correct line should be:
#include
73
Leif / SM5BSZ
#
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Hi all,
Linrad-02-15 had a fix to avoid segfaults under
Free BSD that were related to the timing between
how the different threads start executing. Now
the dsp threads wait for the screen thread to
enter its idel state before producing data and that
guarantees that memory is properly initiaded.
(a
Hi All,
This bug report from Daniel, DL3IAE is of interest to
everyone trying Linrad on a Windows machine.
> in wlr2-16 (older versions too!) the usage of the
> different filter options above the line "reserved
> for blanker" are causing crashes of linrad or muting
> of the sound output. (exce
Hi Roger,
I am sendin this via the mailing list since my mail bounces
reason: 550 [PERMFAIL] comcast.net requires valid sender domain
> I want to add a 'mute' control to Linrad so that one can
> mute the audio output.
> Then when one clicks on the next signal I want the audio output to be
>
Hi Roger and all,
I can still not send any E-mail to comcast.com so I reply
via the mailing list.
> It turned out that it was a bit of a problem having 4 instances of Linrad
> running, with 3 of them muted, and trying to figure out which one was NOT
> muted.
;-)
> Running with the standard
Hello All,
There are still problems with Linrad under Windows.
The most frustrating one is that I can not find out
how to close the output device and then open it
again.
Currently the code (wsetad.c) is like this:
mmrs=waveOutReset(hwav_rxdaout);
if(mmrs != MMSYSERR_NOERROR)lirerr(25344);
for(i=
Sorry, the previous mail was a mistake.
I just had to remove the pause statement:-)
Linrad seems to work fine under Windows now
and it will be possible to change no of channels
and 8/16 bits for the output in the next version.
73
Leif
On Thu, 3 Aug 2006 01:35:01 +0200
Leif Asbrink <[EM
Hi All,
All known bugs (to me) are corrected in this new version.
Please report bugs and unexpected behaviour to the list.
73
Leif
#
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the mailing list .
To unsubscribe, E-mai
Hi Daniel,
> I use several switchable crystals in my DC receiver.
> They are all surplus and some of the have rather "odd"
> frequencies. I would like to be able to change the
> frequency scale above the main waterfall and so adapt
> it to the actual frequency.
There are two files users.c an
Hi Roger, Daniel and all,
> Perhaps there is a reason why this shouldn't work, but...
Hmm, yes
> When I started using 4 simultaneous instances of Linrad for contests,
> using a slightly different center frequency for each instance [for various
> reasons not germane to this discussion] I
Hello Ermanno,
> I have installed Ubuntu 6.06 and Linrad 01.37 and 02.17.
> The version 01.37 with svga and alsa works correctly.
>
> The new version with svga and Xlinrad works fine but often crash when I try
> to move a window:
> " [1224]Attempt to pause a thread that was already paused "
>
Hi All,
How does one know what the correct bfo frequency
is when listening to SSB? With a waterfall graph it is pretty
obvious what frequency to select to make the signal fit the
baseband filter - but that does not give any hint on how far
outside the filter one should place the BFO.
For Linrad-
Hi Bill, Roger, Lasse and all,
Bill wrote:
> Speaking as an old physicist I note that there is nothing in
> the world of physics to establish the frequency of a biological
> voice. I think you have reached a dead end. Perhaps someone
> else can demonstrate that without transmitting a known audio
Hi Joe,
This sounds interesting:
> The methods presented here use a double complex
> correlation of the complex speech spectrum to
> recover the carrier offset. This process provides
> significantly better resolution than more
> conventional correlation processes based on the
> speech power-
Hi Joe and all,
Thanks for making this paper available:
> Pitch-based methods for speech detection and automatic
> frequency recovery
>
> Douglas J. Nelson and Joseph Pencak
> Dept. of Defense (USA)
.
.
> A by-product of the pitch-based detection process is a
> method for automatic r
Hi Roger and all,
Comcast blocks my mail (thinking I am a spammer)
Perhaps others on the list have an interest in the below
so I happily send it via the list:-)
> I got around to installing a truly 64 bit form of Ubuntu this weekend.
> It turns out that the change to 64 bits [with a change in co
Hello Joe,
> I give up. How do I make Linrad's "EME Window" appear once again at
> full size? Somehow I reduced it to a small boxed "X", and I can't seem
> to restore it no normal. I'm running xlinrad 02.17.
To toggle between the small box and the full size EME window,
click on the X.
The EM
Hi All,
There is a bug in the X11 version of Linrad-02.18 that
causes the screen to freeze if the F1 key is pressed.
Linrad-02.18 (and several earlier versions) make an
exit with error 1015 "Routine to open audio output
is called but audio_flag says output is already open."
both under X11 and in
Hi Joe and all,
> I think Roger solved the "problem" with his email to the Linrad
> reflector, copied at the very bottom of this message.
>
> He has found no significant difference in JT65 *decoding ability* with
> Linrad and with a conventional receiver. What he does see is different
> *S/N
Hello Joe and all,
> My attempts to get Linrad to lock onto a JT65 sync signal
> have not been encouraging, so far. My impression is that it sometimes
> gets confused by some data tones, which may be no more than a few Hz
> from the sync tone, or by the gaps in the sync tone -- which can be up
Hi Christophe,
> As for the calibration of flat response I use an HP 8012A pulse
> generator. This works perfectly for the Softrock. However for
> the Time Machine it seems like no matter how well I ground and
> shield there is always LF noise getting into the system...
> (the Softrock seems to
Hi Joe and all,
> > With these parameters Linrad is very sensitive in the main waterfall
> > provided that the waterfall is made very slow. No more than
> > 10 lines per second. The reason is that S/N may be lost in the process
> > of converting the 16384 spectrum to a waterfall of about 100 pixel
Hi Daniel,
> I am getting major crashes of OSS when playing back .raw files with xlinrad.
> 2.19 and 2.17 seem to do the same. After a few minutes of playback there is a
> short beep and sound disapears. "Soundoff" and re-"soundon" does not help,
> although OSS sends no failure message at re-st
Hi All,
There is now a new version available for download.
There are also new links here:
http://www.sm5bsz.com/linuxdsp/usage/examples.htm
73
Leif / SM5BSZ
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Hello Joe ans all,
> 1. The Network capability does not seem to exist in recent Linrad
> versions. Is this correct, or am I missing something about starting it up?
Yes. I have not put the network back after the multi-thread change.
The network was not particularly clever, rather than putting it
Hello Joe and all,
> Is there an easy way to eliminate the new S-meter graph from the screen?
> I do not find it useful, and would prefer to have its screen area
> available for other things.
Yes. I consider this graph very valuable - but only at special
occasions so I normally remove it mys
Hi xtof and all,
> May I suggest using multicast IP for this purpose so that
> the datagrams just get placed on the network and can be subscribed
> to by any station that wants to participate in the multicast
> group. This will scale very well, potentially beyond the
> local network if the infrast
On Thu, 9 Nov 2006 00:45:04 +0100
"J.D. Bakker" <[EMAIL PROTECTED]> wrote:
Thanks. The immediate problem that pops up is here:
In order to play with multicast,
your GNU/Linux box needs special configuration.
Recompiling the kernel is no longer an easy thing.
Nowadays it is even difficult to com
Hi Chris and all,
> > Nowadays it is even difficult to compile kernel modules
> > since modern distributions do not contain the necessary files.
> > One can sometimes download the source code from the Internet,
>
> It is a REQUIREMENT of the GPL that the source code is made
> available.
Sure -
Hi All,
> I fail to see the point of the discussion. For now, I haven t
> seen anybody stepping up to say Multicast is NOT in the version
> of Linux that is running on his or her desktop.
The background is that the first site I looked at where
multicasting was described explicitly stated that the
Hi Roger and all,
> http://www.rfspace.com/sdriq.html
>
> check the 'future options' on this page as well as the specs.
It seems to me that this is "just" a low cost version of the SDR-14.
Presumably it will give 230 kHz with Linrad as does the SDR-14.
To use it or SDR-14 on 144 MHz, just add a
Hi Joe and All,
> During the ARRL EME contest this past weekend, I saved what
> I thought was going to be a nice screen dump showing dozens
> of JT65 EME signals. Unfortunately, I don't know how to
> view the resulting GIF file with the appropriate color
> palette. Bringing up the file in GI
Hi Roger and All,
> I find here that linrad-02.14 makes nice gif files. With 02.19 I get
> NO gifs either from linrad or xlinrad. I installed just 2.20 and I
> also get no gif files with it, whether I run it from commandline mode
> or from within xwindows, whether I use linrad or xlinrad [lat
Hi All,
Most probably I will not comment to anything on this
list for the next two weeks. I will be in the
Dominican Republic, probably without Internet access.
73
Leif / SM5BSZ
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Hello Ramiro,
The problem is soloved. I have checked several modern
and not so modern kernels and they all have multicasting
enabled:-)
(The site where I found that the first step was to
recompile the kernel must have been pretty old)
ON4IY has kindly sent prototype routines. It looks
rea
Hi All,
Multicasting seems straightforward. The simple routines
kindly sent by ON4IY work well inside Linrad for sending
small amounts of test data. Data can be received (simultaneously)
on any computer on the network running Linrad including
a second instance of Linrad running on the same compute
Hi xtof and all,
> For the rulebook on address assigment, see
> http://www.iana.org/assignments/multicast-addresses.
Hmmm,
"Addresses within the 232.0.1.0-232.255.255.255 are dynamically
allocated by hosts when needed [RFC4607]"
Does this mean that 232.144.144.X
with X=0 to 255 could be a good c
Hi All,
Linrad-02.21 is now uploaded. This version is tested under
a large number of distributions and the code for the ft245
kernel module that is needed for the SDR-14 is supplied
in several versions. The configure script generates a Makefile
that selects the correct version of ft245.c
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