[gossamer]

Originally Posted by ADTech

WCBS is near the TOP of the list, position # 6. WFSB is near the bottom, 4th from the end of the list. Both stations operate on UHF channel 33, hence the co-channel warning to the left of the WFSB entry which would indicate it would be completely eclipsed by the much more powerful WCBS.

Even though multiple signals may originate from the exact same antenna as is done on the ESB, each signal may may travel a slightly different path by the time it arrives at your location. Because of the varying wavelengths of the signals, only a certain frequency or small range of frequencies may bounce off some physical object (building, structure, tree, hill, etc) near the signal path such that the reflection arrives out of phase with the original signal. Such reflected signals will add or subtract from the primary signal so that the resultant signal might be anywhere from twice as large (completely additive) to zero (cancels completely). because the ATSC sinal is more than 5 MHz wide, it doesn't take a great deal of reflected energy to cause a hole in the received signal and the data is corrupted. The tuner has to figure out if it can equalize the difference and, if it is unsuccessful, will loose the ability to decode the digital information in the signal. This will cause the dreaded "Weak or no signal message" regardless of the actual signal power at the tuner input.

In the absence of a spectrum analyzer, about all you can do is to move the antenna and try again.

I understand what you wrote completely. Thanks so much for the explanation.

Thanks,
Dave