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The gold standard for use with digital cable systems - but NOT satellite systems
on January 15, 2015
This splitter is the gold standard for use with digital cable systems. It is used by many cable companies and also is provided in many manufacturer's cable modem installation kits.
This product allows splitting an incoming digital cable signal between a cable box for television and a cable modem for Internet. It can also be used for splitting the incoming signal between two cable TV boxes. While I've never seen such, there is no reason that it couldn't be used to split the incoming signal between two cable modems.
The version of this splitter that is rated 5-1002 MHz is MoCA compatible - I'm not certain about the older 5-1000 MHz version. This splitter does not provide point of entry MoCA filtering - you will have to install a MoCA point of entry filter on your incoming cable line before feeding the line to this splitter.
IMPORTANT NOTE: This splitter is not adequate for satellite systems that need 2 or 3 GHz bandwidth, since it only has slightly over 1 GHz bandwidth. On the other hand, splitters for satellite systems, while having higher bandwidth, often won't work properly on a home digital cable system since they are lacking EMI isolation between the two outputs.
If you have both television and internet, the first splitter off of the main cable line should be a two-way splitter such as this one. One output should go directly to the cable modem and the other should be used for television.
If you have more than one cable box, the television output from the two-way splitter should go to another splitter that has enough outputs to supply all of your cable boxes without additional splitting.
Having more than the two splitters described above (i.e.: splitting the television signal multiple times in separate splitters) can potentially leave your cable boxes with inadequate signal.
If you do have several cable television boxes, you MAY need to use a powered distribution amplifier (also known as a signal booster or a powered amplifier/splitter) instead of a plain splitter for the television signal coming out of the first splitter. There is no simple rule for when you need a powered distribution amplifier instead of a splitter. The best advice if you have more than a few cable television boxes is to have someone from the cable company come out and test the signal strength at each connection.
If you have a cable modem, you should NOT use a powered distribution amplifier in place of the first two-way splitter that feeds the cable modem - unless your cable company tells you to do so (they shouldn't!) because of your house receiving a weak signal from the street (in which case the cable company should really be the ones to fix the problem outside of your home, but that's another story).
Having an amplifier between the cable modem and the main cable line can potentially slow down your internet or make it unreliable.
On the other hand, if you do not have *and do not plan* on getting cable internet and you do have several cable boxes, you can skip using an initial two-way splitter and use a powered distribution center as the one and only splitter in your house.
One final point: if installed outdoors it is critical for safety that this splitter be connected to ground using the provided grounding screw connection.