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Old 12-Aug-2015, 11:54 PM   #5
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,753
Quote:
American (Real Channel): 32, 14, 33, 39, 33, 38, 49, 7
Two 33s?
Quote:
Canadian (Real Channel): 20, 19, 41, 44
I didn't see 20 until I clicked on Pending in the report.

There are ways to solve the problem, but they are complicated and expensive. Your friend might have to settle for what he can get. A CATV system uses single channel antennas, and a lot of filters like this:



It is possible to combine two antennas to put a null in the pattern in the direction of the strong signals. This is what hdtvprimer calls the two antenna trick:
Quote:
The towers for Sacramento and San Jose are only 15 degrees apart, but the San Jose towers are visible on the horizon. Pointing an amplified high-gain antenna in this direction will cause both preamp overload and adjacent channel interference. Putting San Jose in a null will permit the reception of Sacramento. Set the masts 40 inches apart. Reversing the polarity of one antenna will cause the null direction to not change with frequency, and all the San Jose stations can sit in the null.


The difference between GI and Toronto is 304 - 329 = 25 degrees.

And finally, there are custom bandstop filters made by Tin Lee that will tame the strong GI signals:
http://www.tinlee.com/MATV-Bandstops.php?active=3#CR7

Your friend has some very strong local FM signals that will interfere with TV reception. Insert an FM filter/trap or a HLSJ (high and common ports) in the coax line. I did an FMFOOL report based on his estimated location, which puts him about 5 blocks SW of Northtown Plaza Shopping Center. See attachment 3.
Attached Images
File Type: jpg CATVants2.jpg (58.0 KB, 8410 views)
File Type: gif Example 3 TATOut.gif (2.2 KB, 1704 views)
File Type: jpg nkreedTVF FM est.JPG (112.7 KB, 1331 views)
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Last edited by rabbit73; 13-Aug-2015 at 12:57 AM.
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