Quote:
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Unfortunately the spectrum analyzer cannot resolve the region of the digital data very well (as far as I can tell), so I don't see how to pursue this further.
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The SA display does show amplitude vs frequency. The pilot carrier at the low end doesn't seem very prominent in your display as it is in the displays by Chris and Pete. A good pilot carrier is needed for tuner lock.
You and Chris have your noise floor at -50, but Pete has moved his window down to see weaker signals.
RTL2832U + R820T DVB-T USB Tuner Card Hints & Kinks
Adjusting where the Noise Floor displays
http://www.highdefforum.com/1353614-post9.html
It is possible to have a good looking flat display of the channel on the SA without being able to receive the signal. A flat display implies no multipath, but multipath reflections can fill in the dips, as Trip in Va found out when he was living in Chattanooga:
Chattanooga: Trouble getting OTA Signal
http://www.avsforum.com/forum/25-hdt...l#post22156611 Post 25
http://www.avsforum.com/forum/25-hdt...l#post22172949 Post 26
My post 26 above gives a quote by Dr. Bendov, et al, that explains why the display can be misleading about multipath and implied SNR.
The only way Trip could receive the locals was to put an antenna in a trash can:
http://www.avsforum.com/forum/25-hdt...l#post21358820
It worked because it narrowed the acceptance angle to reject reflections.
another example:
Bill Naivar's Anti-ghosting Antennas Revisited
http://forum.tvfool.com/showpost.php...27&postcount=7
