[NLRS] Is there published data on tree foliage ...

Chris Elmquist chrise at pobox.com
Fri Jul 11 12:11:36 EDT 2014


On Friday (07/11/2014 at 10:33AM -0500), Doug Reed wrote:
> 
> <http://www.digitalproceiver.com/modsci/public/images/whitePapers/televisionproducts/msi4400a/measuring%208vsb.pdf>
> This PDF is a good description of ATSC broadcasting and reception and
> about slide 15 it has pictures and discussion of how to decode and
> display the data, then evaluate it. It may answer some questions.

So, I guess what you want to do is receive this stuff to I+Q and then
look at the eye diagram.  Smearing of the constellation means you have
a lot of nastiness going on.  Same as any other complex modulation.

Guess it's just down to a software problem then with an app for use with
one of those FunCube dongles (or equiv)  ;-)

Looks like the "MSI 4400 8VSB Analyzer" shown in the presentation is a
software package they are selling that pretty much does this analysis.

Chris N0JCF
-- 
Chris Elmquist



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