PSN-L Email List Message

Subject: Re: WinSDR question
From: Brett Nordgren brett3nt@.............
Date: Mon, 17 Aug 2009 21:23:22 -0400

Hi Chris,

At 09:01 PM 8/17/2009 -0400, you wrote:
>In a message dated 17/08/2009, brett3nt@............. writes:
>>BTW I am getting frequent short data dropouts in the output display.  I
>>have tracked that down to the possibility that I don't have enough RAM
>>(512MB) and am planning to add some more to see if that makes things better.
>Hi Brett,
>     This is most likely to be due to timing problems or to data rate 
> settings near critical values. You can also get it if the processor tries 
> to switch RAM. Check the free RAM and check that the data rates are 
> within specification. The AS-1s have these problems due to a PZT timing 
> ''crystal'' on the processor board in place of quartz.

I didn't mention that I am running as a Client to Dave's machine.  He 
usually doesn't have the dropouts at his end.  Also in a 24x1hour display, 
the currently drawing line doesn't have a problem, but when it gets to the 
end of the line and the screen redraws to make room for the next one, the 
line which was just completed now has had a ~1 minute 'dropout' inserted 
near its beginning.  The reason the gaps are not at the beginning of the 
hour in the gif's is because my screen display is rarely synchronized to 
the start of the hour.

I was just considering how much data it takes to display 24 hours at 200 
samples per second.  A bunch.

Thanks for the suggestions,

Watch our wiggles

or watch some very very good wiggles


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