Brett,

> Hi All,
> 
> I have been trying to provide calibration data for our 24-hour displays, by 
> going to Settings > Channel Control > DC Offset, putting in a number, then 
> watching how far the trace moves up/down.  Knowing the instrument 
> sensitivity per count, I can translate that into velocity units per 
> line.  I had been assuming that the number I was entering for the DC Offset 
> is always representing counts, but now I am not so sure.
> 
> Does anyone know how that works?

Looking at the code the offset is applied to the A/D count and then divided by a
number to get the trace to show up in the right Y location depending on the Y Scale.
Here's the code:

yLoc = lineOffset + -( ( adcData + dcOffset ) / divScale );

> 
> 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.
> 

Adding more memory may help, but you might be trying to displaying too many data
points. As WinSDR draws the screen it is not reading the TCP/IP packets for the
network stack so you will loose data if it takes to long to draw the screen.

Regards,
Larry Cochrane
Redwood City, PSN




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