1-GHz or 2-GHz ?

[Crane]

I am going to be installing some coax cable, splitters, and possibly a signal amp in my house for cable TV. I started to do a little research about what is available and am confused about a basic requirement:

For the splitters and the signal amp - Do I need these to pass frequencies up to 2-GHz or is 1-GHz enough?

I believe that channel # 100 on my cable service (Comcast) is 651 MHz and that each channel is separated by 6 MHz. So then, channel # 254, the highest channel I will receive, should be 1.6 GHz. The highest possible channel available is like # 780 which would be approx. 4.7 GHz.

Do I understand this correctly, or is it more complicated than that?

Any other advice or recommendations about what equipment to buy would also be appreciated.

Thanks,
Larry

[socrplyr]

I don't think there is a cable system out there that uses even up to 1GHz for video yet. I'm not sure how likely they are to use up to 2GHz for video anyways as they would have to have people replace all their in house cabling and what not. Just to clarify something. The channel numbers that you see on digital cable are not their exact channel position. Each real channel is 6MHz as you mention, but that turns out to approx 2 HD channels or 6 SD digital channels or 1 analog channel. To be honest I doubt the cable systems will put video above 1GHz anytime soon, so I don't see a need to go w/ 2GHz cable.