I need to replace the cable splitter the cable company installed when they put in my cable and internet but I don't know what to buy. Do I need to get a powered one or will a ordany one work? The one in use now is not powered and I am having trouble with the signal volume will increase and decrease at random the internet just cuts off at times.

Okay. It would help if you told us what sort of cable it is. Im presuming an "internet" cable, but what type, a Broadband one or a modem one??? CHECK OUT MY MUSIC AT HTTP:\\ROAST.DMUSIC.COM 1040Mhz Pentium 3 OC'd at 1.2Ghz Aopen MX3WPRO-E mobo Intel 810 chipset 64MB Sapphire Radeon 7000 PCI

I am trying to split a coaxial cable. Between the set top box and the cable modem.

I would recommend powered. I had relentless internet problems with tv and internet on a non powered splitter, Comcast eventually installed a dedicated cable for each and now no problems.

Any passive (non-powered) splitter you can buy will work; make sure it is labeled "5-1000 MHz" so it'll pass the forward and return path signals. Also, check the cable connectors. Many problems like this are caused by loose or screw-on type connectors or those installed with a razor knife and pliers. Check that the cables are properly prepped. The shield (the braided or foil outer conductor) should not be in contact with the center conductor and the center conductor should not be nicked or corroded. If the connectors are poorly installed, either call your broadband provider for a service call or invest in some new connectors, and a (relatively) cheap cable prep tool and crimpers. Radio Shack and the big home improvemnt stores carry them. If your connections are good and the problem continues, definitely have your service provider come out to check signal levels in both directions. This could be 2 different problems. It's entirely possible that you have too much or not enough signal both ways, or too much one way and not enough the other.