If you have CATV and OOL you may need to split your main CATV line that drops from the pole or underground. Although a “direct drop” (dedicated CATV line for OOL) is best for OOL, it is not always possible or cost effective.
Your OOL connection to your cable MODEM is best achieved by splitting the signal at the first splitter. You will need a good quality splitter rated at 5 to 1000Mz. with an input impedance of 75 ohms. It should have two splits of no more than - 3.5dB each (insertion loss). The other factor is the tolerance limits on the -3.5dB split. A splitter with a tolerance of + - 3.0dB is not as good as one with a tolerance of + - 1dB. In no case buy a splitter with more than - 4dB loss.
One side of the splitter will be used exclusively for your cable MODEM connection. Do not add any additional splitters after the first split. While the other split is used for your CATVs. This line can be further split for additional TVs.
If you have multiple TVs, a 3 way splitter can be used in the first split. The specs are the same as for the 2 way splitter, except you will have a – 3.5dB split (for the cable MODEM) and two – 7dB splits for the TVs.
Unused splits should be terminated with a 75 ohm terminator.
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by Irish Shark  edited by Lex Luthor
last modified: 2002-08-12 09:49:07 |
