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Thank you for this post. I spent quite a bit of time on google searching for that exact information...
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Glad that I was able to give you more useful information. In the Fall of 2015, I decided I needed to learn more about Noise Margin; that's when I did my research and drew the diagram.
If you want to learn more, my original inspiration came from a post about Noise Margin by Andy Lee, who created the TVFool website:
http://www.avsforum.com/forum/25-hdt...l#post15700679
post #397 of 654
I have reproduced his original two diagrams in Attachments #3 and 5. My revisions are in Attachments #4 and 6.
The last time I checked, the HDB91X was on sale:
http://www.solidsignal.com/pview.asp?p=hdb91x
This is what the HDB91X and the MCM 30-2476 look like up in the air:
Bobsgarage lives north of Chicago, and has two antenna systems on two separate masts; one UHF/VHF system facing north to Milwaukee, and one facing south to Chicago. (In the photo, they are both aimed in about the same direction.) He wanted so many channels, he found it impossible to combine them without losing some. He is using separate tuners.