I need to relocate my Comcast/Xfinity modem to another part of the house. Can I simply just purchase a 50' section of coax, and an inline male to male connector or is it a little more involved than that? Is there a certain coax spec I need to pay atention to?
Make sure you get RG-6 (not RG-59) coax. Try to use as short of a cable as possible, and as few splitters as possible. Put the cable modem 'before' as many splitters as possible.
Modem/router in bridge mode and run to another router or just go wireless. I think the power running through the coax needs to stay in a certain range. Extending the coax and adding equipment to it is the quickest way to take that current out of range.
http://answers.yahoo.com/question/in...1071706AAUxIfsRG-6 has an attenuation at 700 MHz (pretty standard upper limit of the cable spectrum these days) of 5.6 dB per 100 ft. The signal at the tap of a cable TV plant is about 15 dBm. So, at 150 feet of RG6 from the tap, the signal level is about 6.6 dBm (15 dBm - 8.4 dB of attenuation). But, if you throw a splitter in there (to feed 2 TVs), that's another 3.5 dB of attenuation, or 3.1 dBm.
The answer is 5 years old, but I don't think the physics has changed much since then. The distance limit is around 200m for RG6, if I recall
relo'd mine awhile back - i'd say over 50ft - no issues.
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