[linrad] Re: multiple instances of Linrad

["Bodo Heyl" <gmx.de; bodoheyl@xxxxxxxxxxxxxxxx>]

----- Original Message ----- 
From: "w3sz" <w3sz@xxxxxxxxxxx>
To: "Linrad mailinglist" <linrad@xxxxxxxxxxxxxxxxxxxxx>
Sent: Saturday, April 22, 2006 2:45 AM
Subject: [linrad] multiple instances of Linrad


> Hi, All,
>
> The SoftRock v7s are so cheap I am starting to come up with all sorts of 
> uses for them in conjunction with Linrad.
>
> One thing I had mentioned to Leif in the past was running multiple 
> instances of Linrad so that one could watch simultaneously the 
> 'bandscopes' of each of the lower VHF bands at all times during a 
> contest.  Now that X Windows and MSWindows versions of Linrad are 
> available, it is easy to display two or more Linrad windows on the screen 
> at the same time.
>
> With a Soft Rock dedicated to each of 50, 144, 222, and 432 MHz one would 
> have things covered pretty well in terms of constant monitoring of the 
> lower bands during a contest [or just looking for openings on each of the 
> bands simultaneously at other non-contest times].
>
> My thought is to have one computer and monitor dedictated to being this 
> 'full time monitor' using 2 delta44's as inputs [each Delta44 could handle 
> 2 SoftRock cards and therefore 2 bands], and the onboard sound for output, 
> and constant simultaneous displays of the Linrad bandscopes for each of 
> these 4 bands on the screen.
>
> With the appropriate selection of parameters [and the fact that for 
> MONITORING you don't even need to be clicked on a signal most of the time] 
> one should be able to run 4 instances of Linrad and not overtax the cpu.
>
> As I type this I am running two instances of Linrad with the Delta44 
> sending a different [I/Q] input to each and thus I am monitoring two 
> different receive chains displayed in two different 
> Linrad-for-Windows-Windows.  Even when listening to both signals with 
> 96000 Hz sampling the CPU is happy and I am not getting glitches [Windows 
> XP, P4, 3.2 GHz, Linrad-02.6a].
>
> So running 4 instances of Linrad at once with parameters chosen to 
> minimize cpu overhead should be no problem.
>
> I put a screen grab of the two copies of Linrad running at the same time, 
> much as they would be displayed in this application, for your amusement 
> at:
>
> http://www.nitehawk.com/w3sz/twolinradsatonce.gif
>
> The only glitch that I forsee would be if two Delta44 cards installed at 
> the same time are not handled properly by the OS.  But mAudio's site says 
> you can have up to 4 installed at the same time.  If that is true, and if 
> you had the cpu power...I will leave the math to you ;)
>
> I can't wait to get those SoftRocks!  Its almost like free radio ;)
>
> Maybe I had too much caffeine today at work.  Have a great weekend all, 
> and
>
> 73,
>
> Roger Rehr
> W3SZ
>
> --
> Roger Rehr
> W3SZ
> http://www.nitehawk.com/w3sz/
>
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