[linrad] Re: Linrad-02.39

["Joe Barger" <aero.org; barger@xxxxxxxxxxxxxxxx>]

Hi Leif,

> The problem (to me) is that low banders record their data on un-calibrated
> systems and that may cause the problem to look more difficult than it
> really is....

Another problem is the files are probably low bandwidth, 3-4 KHz audio 
files.  And almost certainly uncalibrated.

> With four softrocks you would need 8 analog inputs so a Delta44 would be
> inadequate. There is the Delta 8?, an 8-channel version.
> The hardware we should look for is something using a good VHF-sampling
> A/D like the LTC

I believe it is possible to sync two D44s together, but I haven't looked 
into it.  The HPSDR Mercury board should be interesting when it becomes 
available (http://hpsdr.org/wiki/index.php?title=MERCURY) .

> To start with, you might use a Delta 44 and two softrocks with the
> current Linrad software. You may use the manual polarization setting to
> cancel undesired signals, but you could also allow Linrad to optimize
> the signal level for the interference while you listen in the orthogonal
> channel where the interference would be minimized.

Sounds interesting.  I'll give it a try when I get a chance.

73

joe n6kk 



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