Quote:
Originally Posted by rabbit73
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
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The Megalithia site, is that yours?? Brilliant. I just got lost in it and damned myself for losing all of my morning free time by reading it.
PS also a fan of Lord Kelvin. Great stuff. I'm impressed. I'm saving your website to my bookmarks (for the readers, it's the hyperlink at the bottom of rabbit73's posts) I wish I had your electrical know-how!! I was a dork of a child- taking apart old radios and fiddling with the insides, turning the "pots" so I could receive aircraft radio transmissions (for what it's worth, i had no idea this was a 'thing' nor had anyone told me of the possibility, i was just an extremely curious child) electricity, radio, and telephone science has fascinated me since childhood. If you guessed I was not a popular child in public school you guessed correctly. PPS I also had the thick glasses and once my father had to glue and tape the middle together when they broke, which was often, because the glass was SO thick, and the bridge over the nose so thin, it could not handle the weight of the lenses. It was not until 13 years of age I was allowed contact lenses, but by then my psyche had already been permanently crushed by years of mockery. Such is life!
Thanks Rabbit73- do you have any recommendations of links to websites with fun stuff to read similar to yours? even simple ones are fine- I am always on the lookout for more- thanks - apologies to the OP I do not mean to circumvent your post on reception- just piping in a bit ok?