[linrad] Re: linrad setup error

["leif@xxxxxxxxxx" <leif@xxxxxxxxxx>]

Hi Alex,

> after a Sunday afternoon passed in download ISO's and check them I was able
> to make a good CD_live of W3SZ version of Linrad and now my PC load all OK.
> The new problem I found is that when I am in the S mode and the program ask
> the parameters, I tried the suggested or to change, but always I receive
> this message: "Speed far too slow. Try less demanding FFT! Press any key.
This means that the first fft runs too slowly.
This is because you have selected a too narrow bandwidth that causes
a too large size for the fft - but since you have a PIII this should not
happen easily. My guess is that you ask for too much memory which
causes swapping to the hard disk. Execution then becomes really slow.....

There is a parameter "Use mlockall to prevent swapping?" in the general
parameters setup. (You can change it in par_userint with a text editor)

To minimize memory requirements, deselect second fft and AFC.
Set minimum fft1 storage time and minimum baseband storage time.
Once Linrad starts you will get a message on screen that shows how
large data areas you allocate. 256MB should be plenty, but maybe
some other process is running that uses up memory or cpu time?
I do not know anything about the Knoppix live CD. Maybe it uses
a RAM disk?

73

Leif / SM5BSZ


> Accept...." I made a lot of test but I've always the same answer: I see the
> PC making calculations but at the end I have always this answer. Do I make
> any error? Or not?
> I read all the mailing list message but I did not find any similar question,
> and moreover I didn't find any error message list in order to understand
> what can I do to solve this?
> May I have any help from someone that had the same?
> 
> I remember my PC is PIII 870 MHz CPU, 256 RAM, video Matrox 4000 16 Mb.
> 
> Thanks in advance from a newbie/Elmer on this side....
> 
> Alex I0SKK
> 

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