[linrad] Re: Linrad for Windows

[comcast.net; w3sz@xxxxxxxxxxxxxxxx>]

Hi, Sergio,

Thanks for the note!

I think you are exactly right.  I thought about but did not get rid of the path to the diversity antenna.  Clearly I should have ;)

Let me know if I can help in any way!

73,

Roger
W3SZ


 -------------- Original message ----------------------
From: Sergio <ik2mmb@xxxxxxxx>
> Hello Roger,
> 
> nice piece of information from your side (as usual). We're looking to 
> remote some stuff here so it is very valuable to get these heads up. I 
> will try to check TeamSpeak out and see if I can come up with something, 
>   if is not too much of a hussle for you I hope you don't mind if I'd 
> drop you a couple of lines with some question.
> 
> Regarding Dlinks I've personally used some 900AP+ (the 22MB ones - old) 
> for a long time with no problem at all, but on a short path. Two 
> identical units, one as an AP and one as an AC.   Lately Dario (IW2FZR 
> you might have seen him on moon-net) expressed his desire to remote his 
> station which is about 20 miles from his home. As I don't use them 
> anymore, I modified these old units removing the diversity switch and 
> routing the rf out to a standard SMA connector.  Well those things have 
> changed face, one shall know how bad are those diversity switches.  The 
> isolation between the ports is as bad as 4-5dB! That means that even if 
> one is switched on the outer antenna is anyhow dissipating almost 50% of 
> the power on the other antenna... and on the rx side...
> One unit has doubled the power out and begun definitely 'long heared'. 
> The second unit went from measured 9mW out to 70mW out! That switch was 
> horful!  I did a third one of a friend of mine, same stuff almost 8 
> times the power out and a super rx now...  I also noticed that on long 
> paths it is necessary to shorten the AP beacon very much to avoid to 
> have 'black holes' in the coverage.   Well with the two units and two 1m 
> dish Dario and I did the 20 miles with incredile signals... That is not 
> bad.
> 
> Sorry for long tale, thanks for your info,
> 
> Regards
> 
> Sergio IK2MMB
> 
> 
> 
> 
> 
> w3sz wrote:
> > Hello, All,
> > 
> > Those of you with a long memory will recall that several years ago 
> > [late  2002 or early 2003] I wanted to use Linrad [Linux version, of 
> > course]  remotely but was stymied by its use of svgalib for graphics.  
> > Svgalib is a  local graphics solution, and so that meant that while one 
> > could run Linrad  remotely, one couldn't see the screen at the remote 
> > location.  A network  workaround was found and made a part of Linrad by 
> > Leif, but it was less  than ideal to use in practice.  This was 
> > definitely NOT Leif's fault, but  just a consequence of the environment 
> > surrounding Linrad in Linux. The  problem was basically that if anything 
> > failed at the remote end or in the  link, since you couldn't see the 
> > remote Linrad screen on your monitor, you  had to know the exact 
> > sequence of keystrokes that you needed to input to  blindly re-establish 
> > the Linrad network link and get Linrad running in  whatever mode you 
> > chose after restarting Linrad remotely with RealVNC.   And not all of 
> > the functions were available remotely.  So it was usable,  but not an 
> > ideal solution when the remote site was several miles away.   There is 
> > nothing like driving 4 miles [times two] to do something that  just 
> > takes a few seconds to do when one can see the screen ;)
> > 
> > A moment's thought would indicate that the Windows version of Linrad,  
> > which does not use svgalib, should work remotely with no problem as 
> > long  as the link has enough bandwidth, and this is in fact the case.  I 
> > played  yesterday with running Linrad for Windows remotely over a 4 mile 
> > Wi-Fi  link and it worked fine.  RealVNC did a good job of running 
> > Linrad for  Windows remotely, and I used TeamSpeak to send the audio 
> > across the link.   I let things run for several hours and there were no 
> > hangups or problems.   Even resizing Linrad screen objects remotely was 
> > no problem.  There was no  indication of any more audio latency over the 
> > wireless link with TeamSpeak  than I experienced on the wired network at 
> > home, even though I also had  two video channels running across the link 
> > at the same time [constant  ipcamera monitoring for security].
> > 
> > So if you want to run Linrad remotely, Linrad for Windows makes it easy!
> > 
> > I also tried Speak Freely for the remote audio channel over the network 
> > at  home, and it worked OK.  But I didn't use it over the 4 mile link, 
> > and so  I can't comment on that.  There may be better network audio 
> > solutions than  the ones I tried, but TeamSpeak worked fine for me, and 
> > both TeamSpeak and  Speak Freely were simple to install and get running.
> > 
> > The link is an 802.11b link using a Senao wireless bridge at each end.  
> > It  has been running for about 14 months; before that I used some 
> > D-Link  hardware that was TERRIBLE and gave lousy link performance.
> > 
> > 73,
> > 
> > Roger
> > W3SZ
> > 
> 
> 		
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