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Old 7-May-2014, 4:33 PM   #28
Paul_Aris
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Join Date: Sep 2010
Posts: 15
Quote:
Originally Posted by ADTech View Post
Please go back and do an exact address plot. A zip-code level analysis is usually too prone to variations for it to be reliable.

RG6 and RG6QS coaxial cable typically exhibits 5.5-6 dB insertion loss at 700 MHZ which is the worst case for antenna signals. I usually use a factor of 1 dB per 17 feet and it's plenty close enough. You can pick 15 or 20 feet/db for off-the-cuff estimates and it will usually be close enough. Keep in mind that VHF attenuates much less per unit of cable length so, in the case of very long cable runs, the tilt of the signals (insertion loss of low frequencies vs insertion loss of high frequencies) can become skewed and might require some equalization.

Once more a more accurate analysis is available, estimate the length of your individual cable runs, identify the splitters (2 port, 4 port, etc), and then you can estimate whether any amplification will be required to improve noise margin and to overcome downstream distribution losses.
Still wondering what distribution amplifier I should try to improve WXMI 17. I per my findings one post above. I do get this channel on the closet tv on good days. It goes in and out.
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